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  • 1.
    Bakitian, Fahad
    et al.
    Malmö universitet, Odontologiska fakulteten (OD). Department of Restorative Dentistry, Faculty of Dentistry, Umm Al-Qura University, Makkah, Saudi Arabia.
    Papia, Evaggelia
    Malmö universitet, Odontologiska fakulteten (OD).
    Larsson, Christel
    Malmö universitet, Odontologiska fakulteten (OD).
    Vult von Steyern, Per
    Malmö universitet, Odontologiska fakulteten (OD).
    Evaluation of Stress Distribution in Tooth-Supported Fixed Dental Prostheses Made of Translucent Zirconia with Variations in Framework Designs: A Three-Dimensional Finite Element Analysis2020Inngår i: Journal of Prosthodontics, ISSN 1059-941X, E-ISSN 1532-849X, Vol. 29, nr 4, s. 315-322Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Purpose To evaluate the influence of the framework designs on the stress distribution within tooth-supported partially veneered fixed dental prostheses (FDPs) made of translucent zirconia under simulated loads using a three-dimensional finite element analysis (3D-FEA). Material and Methods For a linear 3D-FEA, simplified 3D solid models of prepared abutment teeth (first premolar and first molar) with different 3-unit FDPs were created. The models with different FDP designs-monolithic zirconia (control); semi-monolithic zirconia with 0.3 mm veneer thickness (SM0.3); semi-monolithic zirconia with 0.5 mm veneer thickness (SM0.5); semi-monolithic zirconia with 0.5 mm veneer thickness supported with cap design (SMC), and semi-monolithic zirconia with 0.5 mm veneer thickness supported with wave design (SMW)-were analyzed using 3D-FEA. The elastic properties of the components (bone, dentine, cement, translucent zirconia, and veneering porcelain) were obtained from the published data for FEA. Simulated static loading forces (300 N) were applied at 10 degrees oblique direction over six points in the occlusal surfaces of the FDPs. Maximum principal stress, shear stress, and safety factor were calculated and analyzed among the different models. Results Semi-monolithic with cap design showed the smallest maximum principal stress levels in the veneering porcelain compared to all other models (SM0.3, SM0.5, SMW). The SM0.3 had lower maximum principal stress levels in the veneering porcelain compared to SM0.5. Regarding stresses in the zirconia framework, all models had comparable results in maximum principal tensile stresses, except SMW had a lower value. Maximum principal stress levels were located in the veneer component of SM0.3, SM0.5, and SMW, whereas, such levels were observed in the cervical areas of the zirconia frameworks of SMC and control. The SM0.3 had the highest maximum shear stress levels at the zirconia-veneer interface, while SMW had the lowest shear values. The 3D-FEA models with different FDP designs showed different minimum safety factor levels. Conclusions Framework and veneer designs play a significant role in the stress distribution of the partially veneered zirconia FDPs under loading. The FDPs with zirconia frameworks with cap design minimize the maximum principal tensile stress in the veneering porcelain. The FDPs with 0.3-mm-veneering porcelain show low maximum principal tensile stress in the veneering porcelain, but highest maximum shear stress at the zirconia-veneer interface. The FDPs with wave design of zirconia frameworks minimize the maximum shear stress considerably.

  • 2.
    Bakitian, Fahad
    et al.
    Malmö universitet, Odontologiska fakulteten (OD). Department of Restorative Dentistry, Faculty of Dentistry, Umm Al-Qura University, Makkah, Saudi Arabia.
    Seweryniak, Przemek
    Commercial Dental Laboratory, Malmö, Sweden.
    Papia, Evaggelia
    Malmö universitet, Odontologiska fakulteten (OD).
    Larsson, Christel
    Malmö universitet, Odontologiska fakulteten (OD).
    Vult von Steyern, Per
    Malmö universitet, Odontologiska fakulteten (OD).
    Effect of different semimonolithic designs on fracture resistance and fracture mode of translucent and high-translucent zirconia crowns2018Inngår i: Clinical, Cosmetic and Investigational Dentistry, E-ISSN 1179-1357, Vol. 10, s. 51-60Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Purpose: The aim of this study was to describe different designs of semimonolithic crowns made of translucent and high-translucent zirconia materials and to evaluate the effect on fracture resistance and fracture mode. Methods: One hundred crowns with different designs were produced and divided into five groups (n=20): monolithic (M), partially veneered monolithic (semimonolithic) with 0.3 mm buccal veneer (SM0.3), semimonolithic with 0.5 mm buccal veneer (SM0.5), semimonolithic with 0.5 mm buccal veneer supported by wave design (SMW), and semimonolithic with 0.5 mm buccal veneer supported by occlusal cap design (SMC). Each group was divided into two subgroups (n=10) according to the materials used, translucent and high-translucent zirconia. All crowns underwent artificial aging before loading until fracture. Fracture mode analysis was performed. Fracture loads and fracture modes were analyzed using two-way ANOVA and Fisher’s exact probability tests (P≤0.05). Results: SM0.3 design showed highest fracture loads with no significant difference compared to M and SMW designs (P>0.05). SM0.5 design showed lower fracture loads compared to SMW and SWC designs. Crowns made of translucent zirconia showed higher fracture loads compared to those made of high-translucent zirconia. M, SM0.3, and all but one of the SMC crowns showed complete fractures with significant differences in fracture mode compared to SMW and SM0.5 crowns with cohesive veneer fractures (P≤0.05). Conclusion: Translucent and high-translucent zirconia crowns might be used in combination with 0.3 mm microcoating porcelain layer with semimonolithic design to enhance the esthetic properties of restorations without significantly decreasing fracture resistance of the crowns. If 0.5 mm porcelain layer is needed for a semimonolithic crown, wave design or cap design might be used to increase fracture resistance. In both cases, fracture resistance gained is likely to be clinically sufficient as the registered fracture loads were high in relation to expected loads under clinical use.

    Fulltekst (pdf)
    FULLTEXT01
  • 3.
    Bakitian, Fahad
    et al.
    Malmö högskola, Odontologiska fakulteten (OD).
    Seweryniak, Przemek
    Papia, Evaggelia
    Malmö högskola, Odontologiska fakulteten (OD).
    Larsson, Christel
    Malmö högskola, Odontologiska fakulteten (OD).
    Vult von Steyern, Per
    Malmö högskola, Odontologiska fakulteten (OD).
    Fracture strength of veneered translucent zirconium dioxide crowns with different porcelain thicknesses.2017Inngår i: Acta Biomaterialia Odontologica Scandinavica, E-ISSN 2333-7931, Vol. 3, nr 1, s. 74-83Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Abstract Objective: To evaluate fracture strength of veneered translucent zirconium dioxide crowns designed with different porcelain layer thicknesses. Materials and Methods: Sixty crowns, divided into six groups of 10, were used in this study. Groups were divided according to different thicknesses of porcelain veneer on translucent zirconium dioxide cores of equal thickness (0.5 mm). Porcelain thicknesses were 2.5, 2.0, 1.0, 0.8, 0.5 and 0.3 mm. Crowns were artificially aged before loaded to fracture. Determination of fracture mode was performed using light microscope. Results: Group 1.0 mm showed significantly (p ≤ .05) highest fracture loads (mean 1540 N) in comparison with groups 2.5, 2.0 and 0.3 mm (mean 851, 910 and 1202 N). There was no significant difference (p>.05) in fracture loads among groups 1.0, 0.8 and 0.5 mm (mean 1540, 1313 and 1286 N). There were significantly (p ≤ .05) more complete fractures in group 0.3 mm compared to all other groups which presented mainly cohesive fractures. Conclusions: Translucent zirconium dioxide crowns can be veneered with minimal thickness layer of 0.5 mm porcelain without showing significantly reduced fracture strength compared to traditionally veneered (1.0–2.0 mm) crowns. Fracture strength of micro-veneered crowns with a layer of porcelain (0.3 mm) is lower than that of traditionally veneered crowns but still within range of what may be considered clinically sufficient. Porcelain layers of 2.0 mm or thicker should be used where expected loads are low only.

    Fulltekst (pdf)
    FULLTEXT01
  • 4.
    Bakitian, Fahad
    et al.
    Malmö universitet, Odontologiska fakulteten (OD). Department of Restorative Dentistry, Faculty of Dentistry, Umm Al-Qura University, Makkah, Saudi Arabia.
    Seweryniak, Przemek
    Commercial Dental Laboratory, Malmö, Sweden.
    Papia, Evaggelia
    Malmö universitet, Odontologiska fakulteten (OD).
    Larsson, Christel
    Malmö universitet, Odontologiska fakulteten (OD).
    Vult von Steyern, Per
    Malmö universitet, Odontologiska fakulteten (OD).
    Load-Bearing Capacity of Monolithic Zirconia Fixed Dental Prostheses Fabricated with Different Connector Designs and Embrasure Shaping Methods2019Inngår i: Journal of Prosthodontics, ISSN 1059-941X, E-ISSN 1532-849X, Vol. 28, nr 1, s. 64-70Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Aim> To investigate the load-bearing capacity and failure mode of monolithic zirconia fixed dental prostheses (FDPs) fabricated with different connector designs and embrasure shaping methods. Materials and methods> Seventy 4-unit zirconia FDPs (with 2 premolar pontics) were fabricated and divided into 7 groups (n = 10) according to the different connector designs gained by using different embrasure shaping methods. The groups were as follows: monolithic FDPs fabricated with sharp embrasures, monolithic FDPs fabricated with blunt embrasures, monolithic FDPs fabricated with blunt embrasures and no occlusal embrasures, 2 groups of monolithic FDPs fabricated with blunt embrasures and interproximal separations made with diamond discs at the soft stage and at the fully sintered stage, and monolithic FDPs fabricated with blunt embrasures and interproximal separation accentuated by localized porcelain build-up. A final group of fully veneered traditional zirconia FDPs to be used as a control group were fabricated with default milling settings. The FDPs were artificially aged and loaded to fracture. Load to fracture and failure modes were analyzed by 1-way ANOVA, Tukey post-hoc test, and Fisher exact test (α = 0.05). Results> The FDPs fabricated with interproximal porcelain separation showed significantly the highest load to fracture (1038 N ± 82) of all groups (p < 0.001), with no significant difference compared to the FDPs with no occlusal embrasures (934 N ± 175) (p ˃ 0.29). The FDPs fabricated with blunt embrasures showed significantly higher load to fracture (873 N ± 115) compared to the FDPs in control group (689 N ± 75) and the FDPs with sharp embrasures (417 N ± 87) (p < 0.001). There were no significant differences between the FDPs with sharp embrasures (417 N ± 87) and the FDPs with interproximal discs separations (467 N ± 94; p ˃ 0.23). Failure mode of the FDPs fabricated with sharp embrasures and interproximal discs separations differed significantly compared to the FDPs in the other groups (p < 0.001). Conclusions> Sharp embrasures and interproximal separations made with diamond discs significantly decrease the load-bearing capacity of monolithic zirconia FDPs compared to FDPs made with blunt embrasures. Blunt embrasures in combination with localized porcelain build-up produce FDPs with high load-bearing capacity in relation to loads that might be expected under clinical use. This article is protected by copyright. All rights reserved.

  • 5. Benetti, Ana Raquel
    et al.
    Papia, Evaggelia
    Malmö universitet, Odontologiska fakulteten (OD).
    Matinlinna, Jukka
    Adhesiv cementering av dentala keramer2019Inngår i: Tandläkartidningen, ISSN 0039-6982, Vol. 110, nr 2, s. 46-52Artikkel i tidsskrift (Fagfellevurdert)
  • 6. Benetti, Ana Raquel
    et al.
    Papia, Evaggelia
    Malmö universitet, Odontologiska fakulteten (OD).
    Matinlinna, Jukka
    Bonding ceramic restorations2019Inngår i: Den norske tannlegeforenings tidende, ISSN 0029-2303, E-ISSN 1894-180X, Vol. 129, nr 1, s. 30-36Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Porcelain and glass ceramics need to be bonded to teeth for the reinforcement of restorations: according to studies, the best results are achieved by pretreating and etching the ceramic surface with hydrofluoric acid, then applying a silane coupling agent or a ceramic primer, and luting with a light- or dual-cured adhesive cement, depending on the restoration thickness. Zirconia may be cemented after gentle roughening by airborne abrasion (grit-blasting) using an adhesive resin composite cement. In addition, tribochemical silica coating combined with silane application is an alternative that might provide enhanced adhesion. The best durable bonding to zirconia is achieved by applying a dual-cured adhesive resin composite cement that contains phosphate ester groups. Among the clinically relevant parameters involved in choosing an adhesive cement system to bond ceramic restorations to the dental hard tissues, the aesthetic properties, colour stability, ease of handling, and appropriate working times of the cement are to be considered.

  • 7. Benetti, Ana Raquel
    et al.
    Papia, Evaggelia
    Malmö universitet, Odontologiska fakulteten (OD).
    Matinlinna, Jukka
    Bonding ceramic restorations2019Inngår i: Tandlægebladet, ISSN 0039-9353, Vol. 123, s. 36-42Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [da]

    Restaureringer af porcelæn og glaskeramik forstærkes ved binding til tænderne: I følge litteraturen opnås de bedste resultater ved forbehandling af disse keramikkers overflade med flussyre efterfulgt af applicering af silan eller keramisk primer, og derefter cementering med en lyshærdende eller kemisk hærdende plastcement. Plastcementtypen er afhængig af restaureringens tykkelse. For restaureringer fremstillet af zirkoniumdioxid anbefales det, at overfladen gøres ru ved gritblæsning med korund partikler før cementering med en adhæsiv plastcement. En alternativ forbehandling af zirkoniumdioxidrestaureringer er silikatisering, efterfulgt af applicering af silan, som har til formål at øge vedhæftningen af plastcementen til keramikken. Den bedste og mest holdbare binding af zirkoniumdioxidrestaureringer opnås ved at anvende en dualhærdende, adhæsiv plastcement, som indeholder fosfatestergrupper. Blandt de klinisk relevante parametre, der er involveret i valg af et adhæsivt cementsystem til binding af keramiske restaureringer til tandens hårde væv, skal æstetik, farvestabilitet, brugervenlighed og arbejdstid nævnes. 

  • 8. Benetti, Ana Raquel
    et al.
    Papia, Evaggelia
    Malmö universitet, Odontologiska fakulteten (OD).
    Matinlinna, Jukka
    Keraamisten rakenteiden adhesiivinen sidostaminen (Bonding ceramic restorations)2019Inngår i: Suomen hammaslaakarilehti, ISSN 0355-4090, Vol. 1, s. 42-48Artikkel i tidsskrift (Fagfellevurdert)
  • 9.
    Dorthé, Lotti
    et al.
    Malmö högskola, Bibliotek och IT (BIT).
    Papia, Evaggelia
    Malmö högskola, Odontologiska fakulteten (OD).
    du Toit, Madeleine
    Malmö högskola, Bibliotek och IT (BIT).
    Fallet "Such a MeSH": Problembaserat lärande för informationskompetens2011Inngår i: Dansk biblioteksForskning : tidsskrift for informations- og kulturformidling, ISSN 1604-7869, E-ISSN 1901-1040, Vol. 7, nr 2/3, s. 45-53Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [sv]

    Hur når vi målen som rör informationskompetens i vår undervisning? Frågan ställdes av en lärare och en bibliotekarie vid Odontologiska fakulteten på Malmö högskola. Den ledde till ett samarbete där bibliotekariens undervisning integrerades helt i fallstudierna på tandteknikerutbildningen. Artikeln beskriver upplägg och genomförande av en modell där informationskompetens och problembaserat lärande kombineras (här kallat IK&PBL-modellen). Bibliotekariens pedagogiska förhållningssätt, i form av problembaserat lärande, är karaktäristisk för den övriga utbildningen på tandvårdshögskolan. Tentamensresultat och kursutvärderingar visar att IK&PBL-modellen bidrar till att utveckla studenternas förmåga att söka information och granska källkritiskt samt ger upphov till diskussioner omkring begreppet vetenskaplighet. Bibliotekarien får en inblick i studenternas utbildning, ökad ämneskunskap och förståelse för inlärningsprocessen medan läraren får insyn i studenternas problem med informationssökning och källkritik.

    Fulltekst (pdf)
    FULLTEXT01
  • 10. du Toit, Madeleine
    et al.
    Papia, Evaggelia
    Malmö högskola, Odontologiska fakulteten (OD).
    Fallet ”Such a MeSH". Problembaserat lärande för informationskompetens på Odontologiska fakulteten. Ett exempel på interprofessionellt samarbete mellan utbildning och bibliotek samt på integration av ämne och informationssökning2011Inngår i: Erfarenhet vs. Forskning: hur utvecklas vi som högskolelärare?, Malmö högskola, Akademiskt Lärarskap (AKL) , 2011, s. 50-53Konferansepaper (Annet vitenskapelig)
  • 11.
    Gaile, Mara
    et al.
    Riga Stradins Univ, Fac Dent, Dept Prosthet Dent, LV-1007 Riga, Latvia..
    Papia, Evaggelia
    Malmö universitet, Odontologiska fakulteten (OD).
    Zalite, Vita
    Riga Tech Univ, Fac Mat Sci & Appl Chem, Rudolfs Cimdins Riga Biomat Innovat & Dev Ctr, Inst Gen Chem Engn, LV-1007 Riga, Latvia..
    Locs, Janis
    Riga Tech Univ, Fac Mat Sci & Appl Chem, Rudolfs Cimdins Riga Biomat Innovat & Dev Ctr, Inst Gen Chem Engn, LV-1007 Riga, Latvia..
    Soboleva, Una
    Riga Stradins Univ, Fac Dent, Dept Prosthet Dent, LV-1007 Riga, Latvia..
    Resin Cement Residue Removal Techniques: In Vitro Analysis of Marginal Defects and Discoloration Intensity Using Micro-CT and Stereomicroscopy2022Inngår i: DENTISTRY JOURNAL, ISSN 2304-6767, Vol. 10, nr 4, artikkel-id 55Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The objective was to compare marginal defects and evaluate discoloration for adhesively cemented veneers in vitro when using two cement removal techniques. Twenty premolars were prepared with chamfer and borders in enamel. IPS e.max CAD veneers were cemented using Panavia V5 and divided in two groups (n = 10): cement excess removed with a probe after tack-curing for 3-5 s, or cement excess removed with a brush, then completely polymerized. All teeth were stored in alginate gel until micro-CT examination. Scanning was performed twice: directly after cementation and after thermocycling (5000 cycles, between 5 and 55 degrees C). To analyze discoloration, teeth were colored using 0.5% basic fuchsine and examined under a stereomicroscope. Depth of dye infiltration was scored 0 (no discoloration) to 5 (discoloration along the entire margin). Statistically significant differences of cement defects before thermocycling were reported, where brushing showed more defects than probing (p = 0.0161). After thermocycling, the defects increased for both groups. Extensive discoloration was the most common (55.56%) when removing excess by probing; by brushing, 90% of the specimens exhibited slight discoloration (p = 0.008). Regression analysis showed no relationship between type of defect and degree of discoloration. Removing cement with a brush causes more marginal defects, however less discoloration after thermocycling.

    Fulltekst (pdf)
    fulltext
  • 12.
    Grinberga, Sanita
    et al.
    Riga Stradins Univ, Fac Dent, Dept Prosthet Dent, LV-1007 Riga, Latvia..
    Papia, Evaggelia
    Malmö universitet, Odontologiska fakulteten (OD).
    Aleksejuniene, Jolanta
    Univ British Columbia, Fac Dent, 2199 Wesbrook Mall, Vancouver, BC V6T 1Z3, Canada..
    Zalite, Vita
    Riga Tech Univ, Inst Gen Chem Engn, Fac Mat Sci & Appl Chem, Rudolfs Cimdins Riga Biomat Innovat & Dev Ctr, LV-1007 Riga, Latvia..
    Locs, Janis
    Riga Tech Univ, Inst Gen Chem Engn, Fac Mat Sci & Appl Chem, Rudolfs Cimdins Riga Biomat Innovat & Dev Ctr, LV-1007 Riga, Latvia..
    Soboleva, Una
    Riga Stradins Univ, Fac Dent, Dept Prosthet Dent, LV-1007 Riga, Latvia..
    Effect of Temporary Cement, Surface Pretreatment and Tooth Area on the Bond Strength of Adhesively Cemented Ceramic Overlays-An In Vitro Study2023Inngår i: DENTISTRY JOURNAL, ISSN 2304-6767, Vol. 11, nr 1, artikkel-id 19Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Several viewpoints have been reported regarding the effect of temporary cements, different surface pretreatment protocols before adhesive cementation, and predictive factors. This in vitro study tested if temporary cement, pretreatment of the tooth surface, the size of enamel or dentine influence adhesive cementation to zirconia ceramics. Twenty premolars were prepared for determination of enamel and dentin area, bond strength test and failure analysis. The samples were divided into two groups: untreated prior adhesive cementation (n = 10) and with temporary cementation done, pretreated prior adhesive cementation (n = 10). Zirconia overlays (Katana Zirconia STML) were cemented on the grounded flat teeth surfaces using Panavia V5. An additional six premolars underwent dentine tubule analysis with SEM to detect temporary cement residues after temporary cementation on an untreated tooth surface (n = 3) and on a pretreated surface (n = 3). The independent sample t-test was used to compare the two groups and the means of the total tooth, dentin or enamel areas did not differ significantly between the untreated and pretreated specimens. The mean tensile bond strength was significantly (p = 0.005) higher in the pretreated specimens (337N) than in the untreated ones (204N). The overall multivariable linear regression model with three predictors (surface pre-treatment, enamel area and dentine area) was significant (p = 0.003), among which the size of enamel was the strongest predictor (beta = 0.506; p = 0.049), followed by the pretreatment effect (beta = 0.478; p = 0.001) and the size of dentin area (beta = -0.105; p = 0.022).

    Fulltekst (pdf)
    fulltext
  • 13.
    Gul, Abdulaziz
    et al.
    Malmö universitet, Odontologiska fakulteten (OD). Department of Oral and Maxillofacial Surgery, Faculty of Dental Medicine, Umm Al-Qura University, Makkah, Saudi Arabia.
    Papia, Evaggelia
    Malmö universitet, Odontologiska fakulteten (OD).
    Naimi-Akbar, Aron
    Malmö universitet, Odontologiska fakulteten (OD).
    Ruud, Amund
    Nordic Institute of Dental Materials, NIOM, Oslo, Norway.
    Vult von Steyern, Per
    Malmö universitet, Odontologiska fakulteten (OD). Nordic Institute of Dental Materials, NIOM, Oslo, Norway.
    Zirconia dental implants; the relationship between design and clinical outcome: A systematic review2024Inngår i: Journal of Dentistry, ISSN 0300-5712, E-ISSN 1879-176X, Vol. 143, s. 104903-, artikkel-id 104903Artikkel, forskningsoversikt (Fagfellevurdert)
    Abstract [en]

    OBJECTIVE: To evaluate the clinical outcome of different designs of zirconia dental implants.

    DATA: This systematic review adhered to the PRISMA checklist and followed the PICO framework. The protocol is registered in PROSPERO (CRD42022337228).

    SOURCES: The search was conducted in March 2023 through four databases (PubMed, Web of Science, Cochrane Library, and Google Scholar) along with a search of references in the related reviews. Three authors reviewed on title, and abstract level and analysed the risk of bias, and all authors reviewed on a full-text level.

    STUDY SELECTION: Clinical studies excluding case reports for patients treated with different designs of zirconia dental implants were included. From a total of 2728 titles, 71 full-text studies were screened, and 27 studies were included to assess the risk of bias (ROBINS-I tool) and data extraction. After quality assessment, four studies were included, and the remaining 23 excluded studies were narratively described.

    RESULT: The included prospective studies with moderate risk of bias reported success and survival rates of one-piece implants that ranged between 95 and 98.4 % with no difference between different lengths and diameters. The acid-etched roughened surface showed higher clinical outcomes compared to other surface roughness designs.

    CONCLUSION: Promising 5-year clinical outcomes were found for one-piece zirconia implants with no difference between different diameters and lengths. Concerning surface roughness, better outcomes were found when using the acid-etched implant surface. However, due to the limited available studies, further high-quality clinical studies comparing zirconia one-piece and two-piece implants with different diameters, lengths, and surface roughness are needed.

    CLINICAL SIGNIFICANCE: Based on this systematic review, under suitable clinical situations, the one-piece zirconia implants with diameters of 4.0 mm, 4.5 mm, or 5.5 mm and lengths of 8 mm, 10 mm, 12 mm, or 14 mm have similar promising clinical outcomes. Additionally, the acid-etched roughened implant surface may be preferable.

    Fulltekst (pdf)
    fulltext
  • 14.
    Jinno, Yohei
    et al.
    Malmö universitet, Odontologiska fakulteten (OD). Section of Implant and Rehabilitative Dentistry, Division of Oral Rehabilitation, Faculty of Dentistry, Kyushu University, Fukuoka, Japan.
    Stocchero, Michele
    Malmö universitet, Odontologiska fakulteten (OD).
    Toia, Marco
    Malmö universitet, Odontologiska fakulteten (OD).
    Papia, Evaggelia
    Malmö universitet, Odontologiska fakulteten (OD).
    Ahmad, Marianne
    Malmö universitet, Odontologiska fakulteten (OD).
    Becktor, Jonas P
    Malmö universitet, Odontologiska fakulteten (OD).
    Impact of salivary contamination during implant placement with different surface characteristics in native and augmented bone: An in vivo study in sheep calvaria model2023Inngår i: Clinical Oral Implants Research, ISSN 0905-7161, E-ISSN 1600-0501, Vol. 34, nr 3, s. 254-262Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    OBJECTIVES: The aim of this study was to evaluate whether salivary contamination during placement of implants with different surface characteristics affects osseointegration in native and in augmented bone areas.

    MATERIALS AND METHODS: Forty eight implants with machined surface (MS) and 48 implants with moderately rough surface (RS) were tested in the calvaria of 12 sheep. At the first surgery, 64 bony critical defects were randomly created and were subsequently augmented with two materials (autogenous or bovine bone). After 5 weeks of graft healing, 8 implants were placed per sheep, in native bone and in the centre of the augmented defects. Forty eight implants were soaked with saliva before placement (contaminated group [CG]), while 48 implants were not (non-contaminated group [NCG]). Five weeks after implant placement, bone-to-implant contact (BIC) and bone material area fraction occupancy (BMAFO) were calculated histomorphometrically.

    RESULTS: Saliva contamination showed a significant negative effect (p = .000) on BIC, especially in augmented areas. RS showed significant positive effect on BIC, compared to MS (p = .000), while there were no significant differences for different bone conditions (p = .103). For BMAFO, the contamination showed a significantly negative affect (p = .000), while there were no significant differences for surface characteristics (p = .322) and for bone condition (p = .538).

    CONCLUSION: Saliva contamination during dental implant placement has a negative effect on osseointegration in augmented areas. Moderately rough surface has a possible advantage in the aspect of initial bone to implant contact. However, it seems to be advisable to avoid saliva contamination especially for implants placed in augmented bone areas.

    Fulltekst (pdf)
    fulltext
  • 15.
    Johansson, Camilla
    et al.
    Malmö universitet, Odontologiska fakulteten (OD).
    Dibes, Jasmin
    Malmö universitet, Odontologiska fakulteten (OD).
    Rodriguez, Luis Emilio López
    Malmö universitet, Odontologiska fakulteten (OD).
    Papia, Evaggelia
    Malmö universitet, Odontologiska fakulteten (OD).
    Accuracy of 3D printed polymers intended for models and surgical guides printed with two different 3D printers.2021Inngår i: Dental materials journal, ISSN 1881-1361, Vol. 40, nr 2, s. 339-347Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    , NextDent™ Model, NextDent™ SG, and two designs; models A and B (n=5), were manufactured (DDDP, EvoDent). Trueness was evaluated by comparing values for 26 parameters with the CAD models' reference values and precision through standard deviation. The trueness and precision were higher for linear than for angle parameters. X- and Y-axes showed higher trueness than Z-axis and model B higher trueness than model A. The conclusions are; the accuracy is dependent on the design of the object. The linear precision appears to be high. The highest trueness was observed for a surgical guide polymer (NextDent™ SG). The definition of clinically relevant accuracy and acceptable production tolerance should be evaluated in future studies.

    Fulltekst (pdf)
    fulltext
  • 16.
    Johansson, Camilla
    et al.
    Malmö universitet, Odontologiska fakulteten (OD).
    Franco Tabares, Sebastian
    Dental Public Service, Gothenburg, Sweden.
    Larsson, Christel
    Malmö universitet, Odontologiska fakulteten (OD).
    Papia, Evaggelia
    Malmö universitet, Odontologiska fakulteten (OD).
    Laboratory, Clinical-Related Processing and Time-Related Factors’ Effect on Properties of High Translucent Zirconium Dioxide Ceramics Intended for Monolithic Restorations A Systematic Review2023Inngår i: Ceramics, E-ISSN 2571-6131, Vol. 6, nr 1, s. 734-797Artikkel, forskningsoversikt (Fagfellevurdert)
    Abstract [en]

    Because new zirconia materials are constantly being developed, the aim was to identify and qualitatively synthesize research on how processing and time-related factors affect the properties of high translucent (HT) zirconia intended for monolithic restorations. Cochrane Library, PubMed, Scopus, Web of Science, and reference lists were searched for in vitro and clinical studies. Eligibility and risk of bias were assessed. A synthesis of 142 publications was performed. HT 3Y-TZP was the most common, followed by 5YSZ, 4YSZ, and multilayer. In the laboratory, HT 3Y-TZP should be sintered according to the manufacturer’s recommendation and polished before glazing to favour strength, roughness, and wear behaviour. In the clinic, polishing is necessary after grinding to favour roughness and aging resistance. Over time, when using hydrothermal aging, tm phase transformation and reduced translucency are expected, without affecting the strength and roughness. The strength of 4YSZ and 5YSZ is unaffected. However, the time-related methods are of questionable clinical significance. The evidence of all other factors’ effects on the properties of HT zirconia is lacking or limited; thus, these factors are of relevance for future research. There is a high heterogeneity of study designs and methods, and the results are brand-dependent.

    Fulltekst (pdf)
    fulltext
  • 17.
    Johansson, Camilla
    et al.
    Malmö universitet, Odontologiska fakulteten (OD).
    Håkansson, Aleksandra
    Malmö universitet, Odontologiska fakulteten (OD).
    Papia, Evaggelia
    Malmö universitet, Odontologiska fakulteten (OD).
    Bond strength between titanium and polymer-based materials adhesively cemented2021Inngår i: Biomaterial Investigations in Dentistry, E-ISSN 2641-5275, Vol. 8, nr 1, s. 79-86Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The aim was to evaluate the bond strength between titanium and polymer-based materials for prosthetic restorations, cemented with different adhesive cement systems. Eight groups with 13 specimens in each group were included. Each specimen consisted of two parts: a cylinder of titanium resembling a titanium base, and a cylinder of one of two polymer-based materials Micro Filled Hybrid (MFH) or Telio CAD and cemented with one of four adhesive cement systems, namely Multilink Hybrid Abutment, Panavia V5, RelyX Ultimate and G-Cem LinkAce. The titanium was sandblasted with 50 µm Al2O3 and treated according to each cement manufacturer's recommendations. The polymer-based materials were pre-treated according to the manufacturer's instructions including sandblasting for MFH. After cementation, the groups were water stored for one day before thermocycling: 5000 cycles in 5–55 °C. A shear bond strength test was performed (crosshead speed 0.5 mm/min) and data was analysed with one-way ANOVA, Tukey's test. Telio CAD cemented with Panavia V5 and G-Cem LinkAce showed significantly lower bond strength compared to all other groups, due to spontaneous debonding. The highest numerical bond strength was found in the group of MFH cemented with RelyX Ultimate or with G-Cem LinkAce. Generally, the Telio CAD groups showed lower bond strength values than the MFH groups. The conclusions are that pre-treatment methods and choice of cement system are of importance for polymer-based materials for prosthetic restorations. The bond strength is adequate for provisional cementation irrespective of cement system when pre-treating by sandblasting, but cement dependent without sandblasting.

    Fulltekst (pdf)
    fulltext
  • 18.
    Le, Minh
    et al.
    Malmö universitet, Odontologiska fakulteten (OD).
    Dirawi, Wissam
    Malmö universitet, Odontologiska fakulteten (OD).
    Papia, Evaggelia
    Malmö universitet, Odontologiska fakulteten (OD).
    Larsson, Christel
    Malmö universitet, Odontologiska fakulteten (OD).
    Clinical outcome of three different types of posterior all-ceramic crowns: a 3-year follow-up of a multicenter, randomized, controlled clinical trial2023Inngår i: International Journal of Prosthodontics, ISSN 0893-2174, E-ISSN 1139-9791, Vol. 36, nr 5Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Purpose: To assess and compare the clinical outcomes of three different types of all-ceramic posterior monolithic tooth-supported crowns. Materials and Methods: A total of 71 patients received 90 all-ceramic crowns randomized to be either high-translucency zirconia (ZC), high-translucency zirconia with a partial buccal veneer (ZC-V), or lithium disilicate glass-ceramic (LDS). All treatments were performed by four general dentists. Choice of material was blinded. Baseline and subsequent annual evaluation were based on modified California Dental Association (CDA) criteria. A questionnaire was used to include patient-reported outcomes and to compare them to the crown quality rating performed by dentists. Results: A total of 66 patients with 84 crowns were examined after 3 years. The survival rate was 98.8%. No crowns fractured during the observation period. One ZC-V crown failed due to loss of retention, and three complications were noted: loss of retention occurred in one ZC crown, and two ZC crowns needed to be endodontically treated. There was no significant difference between the different crowns regarding marginal integrity, surface, or anatomical form. Both patients and examining dentists rated the crowns favorably regarding esthetics, patients more than dentists. Conclusion: Posterior lithium disilicate glass-ceramic crowns and translucent zirconia crowns with or without a partial buccal veneer show excellent and promising clinical outcomes from a short-term perspective. Patients and dentists rate the restorations favorably concerning esthetics and function.

  • 19.
    Le, Minh
    et al.
    Malmö universitet, Odontologiska fakulteten (OD).
    Larsson, Christel
    Malmö universitet, Odontologiska fakulteten (OD).
    Papia, Evaggelia
    Malmö universitet, Odontologiska fakulteten (OD).
    Bond strength between MDP-based cement and translucent zirconia2019Inngår i: Dental materials journal, ISSN 1881-1361, Vol. 38, nr 3, s. 480-489Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The purpose was to evaluate the bond strength between adhesive cement and translucent zirconia in comparison to conventional zirconia. Four brands of translucent zirconia (BruxZir HT, Lava™ Plus, Prettau Anterior, and Prettau Zirconia) and one conventional zirconia (Kavo Everest ZS) were evaluated. Specimens were divided into groups depending on the pretreatment of the cementation surface of the zirconia: as-produced, hydrofluoric acid treatment, or sandblasted. The groups underwent three different procedures of artificial aging: water storage (24 h), 5,000 thermocycles, or long-term aging, (water storage 150 days including 37,500 thermocycles) before shear bond strength testing. Sandblasting treatment increased the bond strength significantly for all the brands of zirconia, irrespective of artificial aging procedures, in comparison to the control group. Bond strength between adhesive cement to translucent zirconia is equivalent to conventional zirconia. Sandblasting creates a cementation surface that is more durable than as-produced or hydrofluoric-acid-treated, irrespective of type of zirconia.

  • 20.
    Le, Minh
    et al.
    Malmö högskola, Odontologiska fakulteten (OD).
    Papia, Evaggelia
    Malmö högskola, Odontologiska fakulteten (OD).
    Larsson, Christel
    Malmö högskola, Odontologiska fakulteten (OD).
    The clinical success of tooth- and implant-supported zirconia-based fixed dental prostheses: a systematic review2015Inngår i: Journal of Oral Rehabilitation, E-ISSN 1365-2842, Vol. 42, nr 6, s. 467-480Artikkel, forskningsoversikt (Fagfellevurdert)
    Abstract [en]

    The aim was to make an inventory of the current literature on the clinical performance of tooth- or implant-supported zirconia-based FDPs and analyse and discuss any complications. Electronic databases, PubMed.gov, Cochrane Library, and Science Direct, were searched for original studies reporting on the clinical performance of tooth- or implant-supported zirconia-based FDPs. The electronic search was complemented by manual searches of the bibliographies of all retrieved full-text articles and reviews, as well as a hand search of the following journals: International Journal of Prosthodontics, Journal of Oral Rehabilitation, International Journal of Oral & Maxillofacial Implants, and Clinical Oral Implants Research. The search yielded 4,253 titles. Sixty-eight potentially relevant full-text articles were retrieved. After applying pre-established criteria 27 studies were included. Twenty-three studies reported on tooth-supported and 4 on implant-supported FDPs. Five of the studies were randomized; comparing Y-TZP based restorations with metal-ceramic or other all-ceramic restorations. Most tooth-supported FDPs were FDPs of 3-5units, whereas most implant-supported FDPs were full-arch. The majority of the studies reported on 3-5 year follow-up. Life table analysis revealed cumulative 5-year survival rates of 93.5% for tooth-supported and 100% for implant-supported FDPs. For tooth-supported FDPs the most common reasons for failure were; veneering material fractures, framework fractures and caries. Cumulative 5-year complication rates were 27.6% and 30.5% for tooth- and implant-supported FDPs respectively. The most common complications were veneering material fractures for tooth- as well as implant-supported FDPs. Loss of retention occurred more frequently in FDPs luted with zinc-phosphate or glass ionomer cement compared to those luted with resin cements. The results suggest that the 5-year survival rate is excellent for implant-supported zirconia-based FDPs, despite the incidence of complications, and acceptable for tooth- supported zirconia-based FDPs. These results are, however, based on a relatively small number of studies, especially for the implant-supported FDPs. The vast majority of the studies are not controlled clinical trials and have limited follow-up. Thus interpretation of the results should be made with caution. Well-designed studies with large patient groups and long follow-up times are needed before general recommendations for the use of zirconia-based restorations can be provided.

    Fulltekst (pdf)
    fulltext
  • 21.
    Le, Minh
    et al.
    Malmö universitet, Odontologiska fakulteten (OD).
    Papia, Evaggelia
    Malmö universitet, Odontologiska fakulteten (OD).
    Larsson, Christel
    Malmö universitet, Odontologiska fakulteten (OD).
    The effect of combining primers and cements from different cement systems on the bond strength between zirconia and dentin2024Inngår i: BDJ Open, E-ISSN 2056-807X, Vol. 10, nr 1, artikkel-id 44Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    OBJECTIVE: The aim of this study was to evaluate the influence of combining primers and cements from two different resin cement systems on the microtensile bond strength (muTBS) between zirconia and human dentin.

    MATERIALS AND METHODS: A total of 120 specimens of zirconia cemented to dentin were allocated into eight groups based on cement type (RelyX Ultimate or Panavia V5) and primers (Tooth Primer, Clearfil Ceramic Primer and Scotchbond Universal Adhesive) combinations, applied to dentin or ceramic surfaces. Following artificial aging with 5000 thermocycles, muTBS tests were conducted. Statistical analysis was performed using One-way ANOVA and Tukey's post hoc tests (p </= 0.05), and failure modes were assessed.

    RESULTS: The Panavia V5 cement system demonstrated the highest bond strength (19.4 +/- 4.4 MPa), significantly higher than the other groups except when RelyX cement was used with Panavia primers (16.9 +/- 3.7 MPa). Cohesive fractures within the cement layer were the predominant failure mode.

    CONCLUSIONS: The combination of primers from different adhesive cement system brands may significantly affect the bonding effectiveness. Therefore, using products from a single product line of the same adhesive cement system, and following the manufacturer's recommendations for indications and use, is crucial for a more predictable clinical outcome.

    Fulltekst (pdf)
    fulltext
  • 22.
    Leisnert, Leif
    et al.
    Malmö högskola, Odontologiska fakulteten (OD).
    Redmo Emanuelsson, Ing Mari
    Folktandvården Skåne, Malmö, Sweden.
    Papia, Evaggelia
    Malmö högskola, Odontologiska fakulteten (OD).
    Ericson, Dan
    Malmö högskola, Odontologiska fakulteten (OD).
    Evaluation of an outreach education model over five years: Perception of dental students and their outreach clinical mentors2017Inngår i: European journal of dental education, ISSN 1396-5883, E-ISSN 1600-0579, Vol. 21, nr 2, s. 113-120Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    INTRODUCTION: The objective was to investigate changes in students' and clinical mentors' perceptions of a model for outreach education over a 5-year period, 2006-2010. MATERIAL AND METHOD: Two cohorts of last-year students of a dental problem-based curriculum and their clinical mentors in the Public Dental Service (PDS) were invited to respond to a questionnaire. In 2006, 85% of 54 students and 72% of their 54 mentors responded; 98% of 40 students and 88% of 41 of the mentors did so in 2010. Participants scored their level of agreement with different statements on a numeric rating scale and gave comments. RESULTS: Dental students and their clinical mentors reported that they shared a consistent and favourable perception of this outreach education model over 5 years. The students reported increased professional confidence and self-reliance. Clinical mentors expressed a transfer of knowledge to their clinics. Differences in scoring were seen between students and mentors for two statements in 2006 and two statements in 2010 (P < 0.05). CONCLUSIONS: The current model for outreach education received favourable and stable ratings over the 5-year period. This model resulted in that students perceived that they became self-reliant, which may facilitate their transition from being a student to becoming a professional. The current model supports exchange and professional development for students, faculty and outreach clinics. This leads us to look at outreach education as an opportunity to form a mutual learning community comprised of the outreach clinics and the dental school.

  • 23.
    Lundberg, Karin
    et al.
    Malmö högskola, Odontologiska fakulteten (OD).
    Wu, Lindsey
    Malmö högskola, Odontologiska fakulteten (OD).
    Papia, Evaggelia
    Malmö högskola, Odontologiska fakulteten (OD).
    The effect of grinding and/or airborne-particle abrasion on the bond strength between zirconia and veneering porcelain: a systematic review2017Inngår i: Acta Biomaterialia Odontologica Scandinavica, E-ISSN 2333-7931, Vol. 3, nr 1, s. 8-20Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Objective: The aim of the study was to make an inventory of current literature on the bond strength between zirconia and veneering porcelain after surface treatment of zirconia by grinding with diamond bur and/or with airborne-particle abrasion. Material and methods: The literature search for the present review was made following recommended guidelines using acknowledged methodology on how to do a systematic review. The electronic databases PubMed, Cochrane Library, and Science Direct were used in the present study. Results: Twelve studies were selected. Test methods used in the original studies included shear bond strength (SBS) test, tensile bond strength test, and micro-tensile bond strength test. The majority of studies used SBS. Results showed a large variation within each surface treatment of zirconia, using different grain size, blasting time, and pressure. Conclusions: Airborne-particle abrasion might improve the bond strength and can therefore be considered a feasible surface treatment for zirconia that is to be bonded. Grinding has been recommended as a surface treatment for zirconia to improve the bond strength; however, this recommendation cannot be verified. A standardized test method and surface treatment are required to be able to compare the results from different studies and draw further conclusions.

    Fulltekst (pdf)
    FULLTEXT01
  • 24.
    Oddbratt, Eliann
    et al.
    Malmö universitet, Odontologiska fakulteten (OD).
    Hua, Lisa
    Malmö universitet, Odontologiska fakulteten (OD).
    Chrcanovic, Bruno R.
    Malmö universitet, Odontologiska fakulteten (OD).
    Papia, Evaggelia
    Malmö universitet, Odontologiska fakulteten (OD). Department of Materials Science and Technology, Faculty of Odontology, Malmö University, Malmö, Sweden.
    Bond strength of zirconia- or polymer-based copings cemented on implant-supported titanium bases – an in vitro study2021Inngår i: Biomaterial Investigations in Dentistry, E-ISSN 2641-5275, Vol. 8, nr 1, s. 129-136Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Purpose

    To evaluate the bond strength between polymer-based copings and zirconia copings as positive control, cemented on implant-supported titanium bases with different adhesive cement systems. Moreover, to evaluate if airborne-particle abrasion of polymethylmetacrylate (PMMA) would enhance the bond strength.

    Methods

    Four groups of different materials were used to fabricate the copings, 30 in each group: airborne-particle abraded milled zirconia (TAZirconia, control group), milled PMMA (TPMMA), airborne-particle abraded milled PMMA (TAPMMA) and 3 D-printed micro filled hybrid resin (TAMFH). Each group of copings was cemented on titanium bases by three different adhesive cement systems, 10 each: Multilink Hybrid Abutment, Panavia V5, RelyX Ultimate. The specimens were stored dry at room temperature for 24 h, subjected to thermocycling for 5000 cycles followed by evaluating the bond strength by tensile strength test.

    Results

    TPMMA and TAPMMA cemented with Multilink Hybrid Abutment showed statistically significant lower bond strength in comparison to TAZirconia and TAMFH. No difference was observed between the latter two. TPMMA, TAPMMA and TAMFH had a statistically significant lower bond strength compared to the control group when cemented with Panavia V5. TPMMA and TAPMMA cemented with Rely X Ultimate showed statistically significant lower bond strength in comparison to the control group.

    Conclusion

    Almost all experimental groups, except 3 D-printed MFH, performed inferior than the positive control group where the highest bond strength was reported for the cementation of zirconia copings cemented with Panavia V5 or Rely X Ultimate. Airborne-particle abrasion did not improve the bond strength of the PMMA, except when Multilink Hybrid Abutment was used.

    Fulltekst (pdf)
    fulltext
  • 25.
    Papia, Evaggelia
    Malmö högskola, Odontologiska fakulteten (OD).
    Micromechanical retention and chemical bonding to polycrystalline dental ceramics: studies on aluminum oxide and stabilized zirconium dioxide2014Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [sv]

    Det pågår en ständig utveckling av olika dentala material avsedda föratt ersätta förlorad tandsubstans. En materialgrupp som är särskiltintressant är höghållfasta keramiska material, oxidkeramer så somyttriumdioxidstabiliserad tetragonal polykristallin zirkoniumdioxid(Y-TZP). Förutom utveckling av material, är en av de störreutmaningarna att få tandersättningar att sitta fast i munnen på ettvävnadsbesparande sätt.Vid traditionell cementeringsteknik, fästs tandstödda ersättningarmed vattenbaserade cement, vars vidhäftning dels är beroendeav att tänderna slipas i syfte att skapa en geometrisk form för attåstadkomma makromekanisk retention och dels av ytstrukturenpå tand och tandersättning som skapas under processen och utgörmikromekanisk retention. I kliniska situationer med otillräckligmakromekanisk retention kan det vara nödvändigt att användaadhesiv cementeringsteknik. En förutsättning för en tillförlitligadhesiv bindning mellan tandersättning, cement och befintligtand är mikromekanisk retention och resinbaserade cement sommöjliggör en kemisk bindning. Det senare har visat sig vara svårtoch oförutsägbart att uppnå för oxidkeramer. Olika tekniker förmodifiering av oxidkeramers cementeringsyta har föreslagits för attmöjliggöra adhesiv cementeringsteknik.Övergripande mål med föreliggande avhandlingsarbete var attutveckla och utvärdera metoder för att modifiera polykristallinakeramers yta och därigenom möjliggöra kombinerad mekanisk ochkemisk bindning mellan oxidkeramer och adhesiva cementsystem. I delarbete I utvärderades bindningsstyrkan mellan olika adhesivacementsystem och en tätsintrad aluminiumoxidbaserad keram. Tvåav sex undersökta cementsystem uppvisade acceptabel bindning tillaluminiumoxid. Valet av ytbehandling på oxidkeramen bör baseraspå vilket cementsystem som ska användas.I delarbete II presenterades och utvärderades en ny framställningsteknikför ytmodifierad Y-TZP, lämpad för adhesivcementeringsteknik. Ytmodifieringen visade ökad mikrostruktur ochhögre bindningsstyrka jämfört med obehandlad Y-TZP. Uppföljninggjordes i delarbete IV med ytterligare ytanalyser och hållfasthetstest.En kemisk sammansättning med glas och monoklin fas identifieradesmed ökad ytråhet. Ytmodifieringen med glasmedium resulterade ilägre hållfasthet som dock ökade i samband med cementering.Delarbete III var en systematisk litteraturöversikt med syfteatt inventera olika metoder för ytbehandling/modifiering avoxidkeramer och utvärdera vilka av dessa som ger kliniskt relevantbindningsstyrka. Indelningen av de olika ytbehandlingarna var:fabriksproducerad, slipad/polerad, sandblästrad, ytmodifierad medolika typer av täckande lager, laser-, syra- och primerbehandlad.Sandblästring eller kiseltäckning av cementeringsytan kombineratmed primer utmärkte sig med högre värden på bindningsstyrkan,något som dock ännu inte blivit bekräftat i kliniska studier. Detfinns ingen universell ytbehandling. Valet av ytbehandlingar börbaseras på vilket material som ska användas.Sammanfattningsvis visar resultaten i avhandlingen att olikaytbehandlingar av oxidkeramer, i synnerlighet ytmodifieringmed glasmedium, kan öka bindningsstyrkan mellan keram ochadhesivt cementsystem. All ytbehandling påverkar dock materialetsegenskaper och slutligen tandersättningen. Valet av ytbehandlingbör göras utifrån specifika materialval, avseende både keram ochrespektive cementsystem.

    Fulltekst (pdf)
    Comprehensive Summary
  • 26.
    Papia, Evaggelia
    et al.
    Malmö universitet, Odontologiska fakulteten (OD).
    Arnoldsson, Pernilla
    Malmö universitet, Odontologiska fakulteten (OD).
    Baudinova, Ayna
    Malmö universitet, Odontologiska fakulteten (OD).
    Jimbo, Ryo
    Malmö universitet, Odontologiska fakulteten (OD).
    Vult von Steyern, Per
    Malmö universitet, Odontologiska fakulteten (OD).
    Cast, milled and EBM-manufactured titanium, differences in porcelain shear2018Inngår i: Dental materials journal, ISSN 0287-4547, Vol. 37, nr 2, s. 214-221Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The objectives were to analyze the oxide layer generated between titanium and porcelain during firing and compare it in different manufacturing techniques: cast, milled and EBM-technique. Seventy two specimens were manufactured, subdivided according to surface treatment: time of passivation (P) and no time of passivation (NP) before porcelain firing. Specimens from each group were analyzed with scanning electron microscopy: one only fired once, and one subjected to six firings. Remaining specimens were subjected to shear bond strength test. The EBM-produced NP-group had highest mean value (25.0 MPa) and the milled P-group showed lowest mean value (18.5 MPa) when all factors were compared. No significant difference was detected according to time of passivation. SEM showed consistent and well-defined boundary between the different layers. Time of passivation and impact on oxide growth was not detected. The bond strength of porcelain to milled titanium is lower when compared to cast titanium and EBM-produced titanium.

  • 27.
    Papia, Evaggelia
    et al.
    Malmö universitet, Odontologiska fakulteten (OD).
    Brodde, Sara Anna Caroline
    Malmö universitet, Odontologiska fakulteten (OD).
    Becktor, Jonas Peter
    Malmö universitet, Odontologiska fakulteten (OD).
    Deformation of polyetheretherketone, PEEK, with different thicknesses.2021Inngår i: Journal of The Mechanical Behavior of Biomedical Materials, ISSN 1751-6161, E-ISSN 1878-0180, Vol. 125, artikkel-id 104928Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In order to determine a suitable thickness of polyetheretherketone (PEEK) for manufacturing of surgical membranes, the purpose was to evaluate how different thicknesses of PEEK influence the mechanical properties under flexure and tension. In total 20 specimens in PEEK with two different thicknesses, 0.5 mm and 1.0 mm were fabricated and tested in a three-point flexural strength test and tensile strength test (n = 5 specimens). Statistical analysis was done with non-parametric Mann-Whitney test with level of significance α = 0.05, for both material tests, respectively. The 1.0 mm-thick samples resulted in higher values in elastic limit and conventional deflection (Sc-value) in the flexural strength test compared to 0.5 mm-thick samples. In the tensile strength test, the results did not show any significant difference in elastic limit depending on the thickness evaluated. However, PEEK with thickness of 1.0 mm received significantly higher maximum value at fracture. Within the limitations of this study, PEEK with a thickness of 0.5 mm–1.0 mm shows mechanical properties that are appropriate thickness and can meet the complex demands for dimensioning of surgical membranes.

    Fulltekst (pdf)
    fulltext
  • 28.
    Papia, Evaggelia
    et al.
    Malmö högskola, Bibliotek och IT (BIT). Malmö högskola, Odontologiska fakulteten (OD).
    du Toit, Madeleine
    Malmö högskola, Bibliotek och IT (BIT).
    "Such a MeSH" - ett fruktbart samarbete mellan Bibliotek och IT och Odontologiska fakulteten, Malmö högskola2009Konferansepaper (Annet vitenskapelig)
    Abstract [sv]

    Personal vid högskole- och universitetsbibliotek arbetar kontinuerligt för att skapa goda kontakter med utbildningsledare och lärare för att på ett naturligt sätt komma närmre det pedagogiska arbetet och studenterna. Detta kan av olika anledningar vara problematiskt. Kanske känns avståndet mellan lärare och bibliotekarier stort och kontaktytorna få. Den förståelse som krävs för att etablera ett samarbete de olika yrkesgrupperna emellan och insynen i varandras kompetensområden kan vara begränsad. Bibliotekarier förbiser emellanåt vikten av utåtriktad marknadsföring av sin service och kompetens medan kursansvariga kanske inte har en tanke på en bibliotekarie som en möjlig och värdefull samarbetspartner i det pedagogiska arbetet. Praktiska problem kan förekomma såsom stora avstånd till ett bibliotek eller lokaler där yrkesgrupperna sällan möts. Bland bibliotekarier som arbetar pedagogiskt uttrycks ofta en önskan om utökat samarbete med lärare. Målet är att de olika kunskapsområdena ska integreras med varandra och för att ge studenten en bred och samtidigt djup förståelse för både huvudämne och informationskunskap. Odontologiska biblioteket på Tandvårdshögskolan vid Malmö högskola arbetar mot tre grundutbildningar, tandhygienist-, tandläkar- och tandteknikerutbildningen, samt fakultetens personal. Samtliga utbildningar använder sig av PBL och arbetar enligt den så kallade Malmömodellen.1 Under 2004 lade biblioteket fram ett förslag i grundutbildningsnämnden om ett nytt upplägg för undervisning i informationssökning för samtliga utbildningar på fakulteten. Personalen i biblioteket hade uppmärksammat att många studenter inför fördjupningsstudierna behövde hjälp med att söka information. Bibliotekets undervisning hade dittills koncentrerats till utbildningarnas första termin vilket gjorde att kunskaperna hann falla i glömska när det var dags för studenterna att skriva egna arbeten med mer omfattande informationssökning. För att skapa kontinuitet och bättre förutsättningar för lärande antogs förslaget att undervisningen framöver istället skulle följa en progressionsplan och ske i anslutning till fördjupningsstudierna. På så sätt anpassades även bibliotekets undervisning till utbildningarnas upplägg och studenterna behov. Denna progressionsplan tillämpas fortfarande på tandhygienist- och tandläkarutbildningen. På tandteknikerutbildningen (180 hp) har man i samarbete med biblioteket fortsatt arbetet och utvecklat en egen modell. Sedan 2005 pågår ett nära samarbete mellan biblioteket och tandteknikerutbildningen. Vi vill med konkreta exempel beskriva hur ett för alla parter, bibliotek, lärare och framför allt studenter, utvecklande samarbete skapats och utvecklats på vår högskola.

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    FULLTEXT01
  • 29.
    Papia, Evaggelia
    et al.
    Malmö universitet, Odontologiska fakulteten (OD).
    Habib, Weam
    Malmö universitet, Odontologiska fakulteten (OD).
    Larsson, Christel
    Malmö universitet, Odontologiska fakulteten (OD).
    The Influence of Different Designs, Materials and Cements on the Success and Survival Rate of Endocrowns: A Systematic Review2020Inngår i: European Journal of Prosthodontics and Restorative Dentistry, ISSN 0965-7452, Vol. 28, s. 100-111Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The aim is to evaluate the success and survival rate of endocrowns and the influence of design, material and cements. A search of clinical trials of endocrowns was performed using three databases (Medline/PubMed, Scopus, CochraneLibrary), complemented by a manual search. The search resulted in 2,718 studies, six of which were included for analysis. The follow-up times were 2-12 years. Feldspathic porcelain was the material of choice cemented with different adhesive resin cement systems. Designs varied significantly. In total, the six studies represented 471 endocrowns. Thirty-six of these failed. Most common failures were loss of retention and fracture. Due to insufficient information on timing of events and drop-out, no statistical analysis was performed. No conclusive correlation between design, material, cement and success or survival of endocrowns could be established. Signs of differences in survival rates between molar and premolar endocrowns were noted, with a tendency towards higher survival rates for molar endocrowns. Feldspathic ceramic endocrowns with adhesive cementation demonstrate promising clinical performance. These conclusions are however based on a limited number of studies of comparatively low quality. Further studies are thus needed to verify the conclusions and to provide guidance in the clinical decision on best choice of materials, design and cements.

  • 30.
    Papia, Evaggelia
    et al.
    Malmö högskola, Odontologiska fakulteten (OD).
    Jimbo, Ryo
    Malmö högskola, Odontologiska fakulteten (OD).
    Chrcanovic, Bruno
    Malmö högskola, Odontologiska fakulteten (OD).
    Andersson, Martin
    Vult von Steyern, Per
    Malmö högskola, Odontologiska fakulteten (OD).
    Surface structure and mechanical properties of impaction-modified Y-TZP2014Inngår i: Dental Materials, ISSN 0109-5641, E-ISSN 1879-0097, Vol. 30, nr 8, s. 808-816Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Objectives The objectives of the study were to describe the surface structure and the chemical surface composition of Y-TZP ceramics produced by using the modified additive technique and to evaluate the flexural strength of Y-TZP with or without surface modification and with different pretreatments: etching before or after sintering combined with or without an adhesive cement system. Methods Y-TZP discs were used for surface analysis (n = 48) and for biaxial flexural strength testing (n = 200). The specimens were divided into groups depending on the cementation surface of Y-TZP: unmodified, sandblasted or glass-modified Y-TZP surfaces, and according to the production process: etching before or after sintering. Results The surface structure and the chemical composition of glass-modified Y-TZP differ; a rougher surface and phase transformation was identified compared to unmodified Y-TZP. The unmodified Y-TZP groups showed significantly higher flexural strength compared to the glass-modified groups (p < 0.001) and showed increased flexural strength after sandblasting (p < 0.001). Furthermore, by adding cement to the surface, the value increased even further in comparison with the sandblasted non-cemented specimens (p < 0.01). After thermocycling, however, the cement layer on the unmodified and the sandblasted surfaces had air pockets and regions with loose cement. Significance A rougher surface structure, superficial glass remnants and a higher content of m-phase was present in the cementation surface of glass-modified Y-TZP. The glass modification creates a bondable cementation surface that is durable. By etching the glass-modified Y-TZP before sintering, a more homogenous surface is created compared to one that is etched after sintering.

  • 31.
    Papia, Evaggelia
    et al.
    Malmö universitet, Odontologiska fakulteten (OD).
    Larsson, Christel
    Malmö universitet, Odontologiska fakulteten (OD).
    Material-related complications in implant-supported fixed dental restorations: A systematic review2018Inngår i: European Journal of Oral Implantology, ISSN 1756-2406, E-ISSN 1756-2414, Vol. 11, nr Suppl 1, s. S147-S165Artikkel, forskningsoversikt (Fagfellevurdert)
    Abstract [en]

    Aim: A large variety of dental materials are available for the production of implant-supported fixed restorations. Materials with different properties are likely to behave differently during clinical function, which may result in different prevalence and types of complications. The aim of the present review was to summarise, analyse and discuss the prevalence and types of complications or failures related to dental materials in implant-supported restorations. Materials and methods: A strategy was set up using the PICO format and the search was performed using the PubMed database, including a hand search of reference lists. Two independent reviewers selected papers based on a set of criteria. The number of events of complications was summarised. Results: The initial search produced 2764 titles. After application of criteria, 47 publications were selected for analysis. Seventeen studies reported on 1447 single crowns and 30 studies reported on 2190 fixed dental prostheses. The most common complications were fracture or chipping of the veneer material, loss of retention and lost access hole fillings. Due to the heterogeneity of studies, and large variation in number of restorations per material group, no conclusive correlation between type of material and type of technical complication and/or failure could be established. Conclusions: The review did not succeed in providing convincing evidence to answer the question concerning a possible relationship between restoration materials and prevalence of technical complications in implant-supported restorations

  • 32.
    Papia, Evaggelia
    et al.
    Malmö högskola, Odontologiska fakulteten (OD).
    Larsson, Christel
    Malmö högskola, Odontologiska fakulteten (OD).
    du Toit, Madeleine
    Malmö högskola, Bibliotek och IT (BIT).
    Vult von Steyern, Per
    Malmö högskola, Odontologiska fakulteten (OD).
    Bonding between oxide based ceramics and adhesive cement systems: a systematic review2014Inngår i: Journal of Biomedical Materials Research. Part B - Applied biomaterials, ISSN 1552-4973, E-ISSN 1552-4981, Vol. 102, nr 2, s. 395-413Artikkel, forskningsoversikt (Fagfellevurdert)
    Abstract [en]

    The following aims were set for this systematic literature review: (a) to make an inventory of existing methods to achieve bondable surfaces on oxide ceramics and (b) to evaluate which methods might provide sufficient bond strength. Current literature of in vitro studies regarding bond strength achieved using different surface treatments on oxide ceramics in combination with adhesive cement systems was selected from PubMed and systematically analyzed and completed with reference tracking. The total number of publications included for aim a was 127 studies, 23 of which were used for aim b. The surface treatments are divided into seven main groups: as-produced, grinding/polishing, airborne particle abrasion, surface coating, laser treatment, acid treatment, and primer treatment. There are large variations, making comparison of the studies difficult. An as-produced surface of oxide ceramic needs to be surface treated to achieve durable bond strength. Abrasive surface treatment and/or silica-coating treatment with the use of primer treatment can provide sufficient bond strength for bonding oxide ceramics. This conclusion, however, needs to be confirmed by clinical studies. There is no universal surface treatment. Consideration should be given to the specific materials to be cemented and to the adhesive cement system to be used.

  • 33.
    Papia, Evaggelia
    et al.
    Malmö högskola, Odontologiska fakulteten (OD).
    Vult von Steyern, Per
    Malmö högskola, Odontologiska fakulteten (OD).
    Bond strength between different bonding systems and densely sintered alumina with sandblasted surfaces or as produced2008Inngår i: Swedish Dental Journal, ISSN 0347-9994, Vol. 32, nr 1, s. 35-45Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The traditional zinc phosphate cementation technique for crowns and fixed partial dentures (FPDs) is based on mechanical retention where the geometry of the prepared tooth provides retention for the restoration. In clinical situations where mechanical retention is compromised or regarded insufficient, a bonding system can be used to provide retention. This study investigates whether bond strengths of different bonding systems to densely sintered high-strength alumina ceramics are sufficient. One hundred twenty pairs of industrially manufactured specimens--one block and one cylinder-shaped disc of densely sintered alumina--were used. The cementation surfaces of the blocks were sandblasted with 110-microm aluminium oxide while the cementation surfaces of the discs were left untreated, as produced. The pairs were then bonded with one of six different bonding systems. Each bonding group of 20 samples was randomly divided into thermocycled and non-thermocycled subgroups (n=10). Both subgroups were stored 1 week in distilled water (37 degrees C). During this week, the thermocycled subgroup underwent 5000 thermocycles (5 degrees C-55 degrees C). Following pre-treatment, the specimens were loaded until fracture in a universal testing machine to determine shear bond strength. Data were analysed using student's t-test and a one-way ANOVA. Fractured interfaces were examined under a light microscope to classify the failure mode of the debonded area as adhesive, cohesive, or a combination of the two. The highest bond strengths, achieved with two of the bonding systems, were significantly higher than the remaining bonding systems, irrespective of pretreatment--(p>0.001). The predominant failure mode for both treated and untreated surfaces was adhesive. Two of the six tested bonding systems achieved sufficient shear bond strength to densely sintered alumina. Furthermore, recommendations on whether to use surface-treated or as produced densely sintered alumina must be based on which bonding system is being used.

  • 34.
    Papia, Evaggelia
    et al.
    Malmö högskola, Odontologiska fakulteten (OD).
    Vult von Steyern, Per
    Malmö högskola, Odontologiska fakulteten (OD).
    Bond strengths of different adhesion systems to a sandblasted alumina core material2006Konferansepaper (Annet vitenskapelig)
  • 35.
    Papia, Evaggelia
    et al.
    Malmö högskola, Odontologiska fakulteten (OD).
    Zethraeus, Johan
    Ransbäck, Per-Åke
    Wennerberg, Ann
    Malmö högskola, Odontologiska fakulteten (OD).
    Vult von Steyern, Per
    Malmö högskola, Odontologiska fakulteten (OD).
    Impaction-modified densely sintered yttria-stabilized tetragonal zirconium dioxide: methodology, surface structure, and bond strength2012Inngår i: Journal of Biomedical Materials Research. Part B - Applied biomaterials, ISSN 1552-4973, E-ISSN 1552-4981, Vol. 100, nr 3, s. 677-684Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The objectives of the study were to describe a novel method for producing zirconium dioxide specimens with a cementation surface that allows adhesive cementation techniques, to describe the surface structure and to evaluate the bond strength. Forty-eight pairs of specimens were fabricated and adhesively luted together. Three different surfaces were tested: impaction-modified surfaces created by using glass granules (G), impaction-modified surfaces created by using polymer granules (P) and a nonmodified control surface (C). Two bonding systems were used, Variolink(®)II (VA) or Panavia™F 2.0 (PA). During the different fabrication steps, the surfaces were examined under light microscope and analyzed with an optical interferometer. All groups were thermocycled and subjected to shear bond strength test. The groups with modified cementation surfaces showed significantly higher shear bond strength: 34.9 MPa (VA-G), 30.9 MPa (VA-P), 29.6 MPa (PA-P), and 26.1 MPa (PA-G) compared with the relevant control group: 20.5 MPa (VA-C) and 17.8 MPa (PA-C). The groups with surface modification showed a rougher surface structure and significantly fewer fractures between the cement and the zirconium dioxide surfaces compared to the control groups where all failures were adhesive. Impaction modification with an impaction medium pressed into the cementation surface of zirconium dioxide-based reconstructions can be used in combination with an additive production technique to increase bond strength. Both modification techniques described in the study result in a rougher surface structure and higher shear bond strength compared to the control groups.

  • 36.
    Stocchero, Michele
    et al.
    Malmö universitet, Odontologiska fakulteten (OD).
    Jinno, Yohei
    Kyushu Univ, Fac Dent Sci, Div Oral Rehabil, Sect Implant & Rehabilitat Dent, Fukuoka, Japan..
    Toia, Marco
    Malmö universitet, Odontologiska fakulteten (OD).
    Ahmad, Marianne
    Malmö universitet, Odontologiska fakulteten (OD).
    Galli, Silvia
    Malmö universitet, Odontologiska fakulteten (OD).
    Papia, Evaggelia
    Malmö universitet, Odontologiska fakulteten (OD).
    Herath, Manjula
    Malmö universitet, Odontologiska fakulteten (OD).
    Becktor, Jonas P
    Malmö universitet, Odontologiska fakulteten (OD).
    Effect of Drilling Preparation on Immediately Loaded Implants: An In Vivo Study in Sheep2023Inngår i: International Journal of Oral & Maxillofacial Implants, ISSN 0882-2786, E-ISSN 1942-4434, Vol. 38, nr 3, s. 607-618Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Purpose: To determine the biologic and biomechanical effects of two implant drilling protocols on the cortical bone around implants subjected to immediate loading. Materials and Methods: A total of 48 implants were inserted into the mandibles of six sheep following one of two drilling protocols: undersized preparation (US; n = 24) and nonundersized preparation (NUS; n = 24). Immediately after implant insertion, an abutment was placed on each implant and 36 implants were subjected to 10 sessions of dynamic vertical loads (1,500 cycles, 1 Hz) of 25 N or 50 N. Insertion torque value (ITV) was recorded at implant installation. Resonance frequency analysis (RFA) was measured at implant insertion and at each loading session. Fluorochrome was administered at day 17, and the animals were euthanized after 5 weeks. The removal torque values (RTVs) were measured, and samples underwent histomorphometric, mu CT (microcomputed tomography), and fluorescence image acquisition analyses. The bone volume density (BV/TV), bone-to-implant contact (BIC), bone area fraction occupancy (BAFO), and fluorochrome stained bone surface (MS) were calculated. A linear mixed model analysis was performed, and Pearson paired correlation was calculated. Results: Five implants from the NUS group failed, with a mean ITV of 8.8 Ncm and an RFA value of 57. The mean ITVs for US group and NUS group were 80.5 (+/- 14) Ncm and 45.9 (+/- 25) Ncm, respectively (P < .001). No differences were noted in the RFA values from the time of implant insertion until the end of the study. No differences in RTV, BV/TV, BAFO, or MS were observed between the groups. Intense new bone formation took place in the NUS group implants that were subjected to load. Conclusions: Undersized preparation of cortical bone ensured a greater BIC compared to a nonundersized preparation. Moreover, this study demonstrated that immediate loading did not interfere with the osseointegration process, but loading induced intense new bone formation in the NUS group. It is not recommended to immediately load the implants when the clinically perceived primary stability is lower than an ITV of 10 Ncm and an RFA value of 60.

  • 37.
    Stocchero, Michele
    et al.
    Malmö universitet, Odontologiska fakulteten (OD).
    Jinno, Yohei
    Malmö universitet, Odontologiska fakulteten (OD).
    Toia, Marco
    Malmö universitet, Odontologiska fakulteten (OD).
    Ahmad, Marianne
    Malmö universitet, Odontologiska fakulteten (OD).
    Papia, Evaggelia
    Malmö universitet, Odontologiska fakulteten (OD).
    Yamaguchi, Satoshi
    Department of Biomaterials Science, Osaka University Graduate School of Dentistry, Osaka, 565-0871, Japan.
    Becktor, Jonas P
    Malmö universitet, Odontologiska fakulteten (OD).
    Intraosseous Temperature Change during Installation of Dental Implants with Two Different Surfaces and Different Drilling Protocols: An In Vivo Study in Sheep2019Inngår i: Journal of Clinical Medicine, E-ISSN 2077-0383, Vol. 8, nr 8, artikkel-id 1198Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    BACKGROUND: The intraosseous temperature during implant installation has never been evaluated in an in vivo controlled setup. The aims were to investigate the influence of a drilling protocol and implant surface on the intraosseous temperature during implant installation, to evaluate the influence of temperature increase on osseointegration and to calculate the heat distribution in cortical bone. METHODS: Forty Branemark implants were installed into the metatarsal bone of Finnish Dorset crossbred sheep according to two different drilling protocols (undersized/non-undersized) and two surfaces (moderately rough/turned). The intraosseous temperature was recorded, and Finite Element Model (FEM) was generated to understand the thermal behavior. Non-decalcified histology was carried out after five weeks of healing. The following osseointegration parameters were calculated: Bone-to-implant contact (BIC), Bone Area Fraction Occupancy (BAFO), and Bone Area Fraction Occupancy up to 1.5 mm (BA1.5). A multiple regression model was used to identify the influencing variables on the histomorphometric parameters. RESULTS: The temperature was affected by the drilling protocol, while no influence was demonstrated by the implant surface. BIC was positively influenced by the undersized drilling protocol and rough surface, BAFO was negatively influenced by the temperature rise, and BA1.5 was negatively influenced by the undersized drilling protocol. FEM showed that the temperature at the implant interface might exceed the limit for bone necrosis. CONCLUSION: The intraosseous temperature is greatly increased by an undersized drilling protocol but not from the implant surface. The temperature increase negatively affects the bone healing in the proximity of the implant. The undersized drilling protocol for Branemark implant systems increases the amount of bone at the interface, but it negatively impacts the bone far from the implant.

    Fulltekst (pdf)
    FULLTEXT01
  • 38.
    Toia, Marco
    et al.
    Malmö universitet, Odontologiska fakulteten (OD).
    Stocchero, Michele
    Malmö universitet, Odontologiska fakulteten (OD).
    Galli, Silvia
    Malmö universitet, Odontologiska fakulteten (OD).
    Papia, Evaggelia
    Malmö universitet, Odontologiska fakulteten (OD).
    Wennerberg, Ann
    University of Gothenburg.
    Becktor, Jonas P
    Malmö universitet, Odontologiska fakulteten (OD).
    The use of implant-level connection in screw-retained fixed partial dentures: A 3-year randomised clinical trial.2022Inngår i: Clinical Oral Implants Research, ISSN 0905-7161, E-ISSN 1600-0501, nr 1, s. 78-93Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    OBJECTIVES: This randomised controlled trial compares the 3-year outcomes, that is, marginal bone-level (MBL) changes and clinical parameters, between an abutment-level (AL) and implant-level (IL) connection for implants with an internal conical connection (ICC) supporting a screw-retained fixed partial denture.

    MATERIAL AND METHODS: Fifty patients with 119 implants were randomly allocated to either the AL or IL group. Radiographic and clinical examinations were performed after one, two, and 3 years. A linear mixed model was used to evaluate the differences between groups.

    RESULTS: The MBL change was not significantly different between the groups at any point. The MBL was 0.12 ± 0.31 mm (AL) and 0.23 ± 0.26 mm (IL) after 1 year; 0.15 ± 0.34 mm (AL) and 0.17 ± 0.22 mm (IL) after 2 years; 0.18 ± 0.39 mm (AL) and 0.15 ± 0.21 mm (IL) after 3 years. The bleeding on probing was 43.44 ± 39.24% (AL) and 58.19 ± 41.20% (IL) after 1 year; 35.78 ± 39.22% (AL) and 50.43 ± 41.49% (IL) after 2 years; 51.27 ± 44.63% (AL) and 49.57 ± 37.31% (IL) after 3 years and was significantly different (p = .025) between 1 and 2 years. The probing depth showed a significant difference at each time point while the plaque was not significant between the groups. The overall technical, biological and prosthetic complication rates were 5.04%, 3.36%, and 16.00%, respectively.

    CONCLUSIONS: The MBL change was similar in the groups. The slight differences in the soft tissue complications between the groups are likely not of clinical relevance. An IL connection is considered to be a valid alternative to an AL set-up in ICC implants.

    Fulltekst (pdf)
    fulltext
  • 39.
    Vervack, Valentin
    et al.
    Department of Oral Health Sciences, Reconstructive Dentistry, Faculty of medicine and Health Sciences Ghent University Ghent Belgium.
    Johansson, Camilla
    Malmö universitet, Odontologiska fakulteten (OD).
    Coster, Peter De
    Department of Oral Health Sciences, Reconstructive Dentistry, Faculty of medicine and Health Sciences Ghent University Ghent Belgium.
    Fokkinga, Wietske
    Department of Dentistry, Radboud Institute for Health Sciences Radboud University Medical Centre Nijmegen The Netherlands.
    Papia, Evaggelia
    Malmö universitet, Odontologiska fakulteten (OD).
    Vandeweghe, Stefan
    Department of Oral Health Sciences, Reconstructive Dentistry, Faculty of medicine and Health Sciences Ghent University Ghent Belgium.
    The fracture strength and the failure mode of lithium disilicate or resin nano ceramics as a crown, overlay, or endocrown restoration on endodontically treated teeth2024Inngår i: Journal of Esthetic and Restorative Dentistry, ISSN 1496-4155, E-ISSN 1708-8240, Vol. 36, nr 5, s. 796-803Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Introduction

    Different materials and restorative concepts have been proposed over the years to restore endodontically treated teeth (ETT). Monolithic ceramic and composite restoration can be lute to the tooh, without the use of a post. However, little is known how the material stiffness and presence of a composite core will affect the survival and failure mode.

    The objective of this in-vitro study was to evaluate the fracture strength and failure mode of endodontically treated molars, restored with ceramic or hybrid composite monolithic restoration, in the presence of absence of a composite core.

    Materials and Methods

    Sixty depulped molars were restored with a lithium-disilicate (e.max CAD) or hybrid composite (Cerasmart) restoration. Both materials were used in a monolithic approach, but with 3 different designs: (a) monolithic endocrown, (b) crown with a separate composite core, and (c) overlay without core buildup or pulpal extension. Ten sound teeth were used as control group. All groups were thermocycled (10,000 cycles), subsequently loaded in a chewing simulator (100,000 cycles) and finally loaded until fracture.

    Results

    Peak fracture loads and failure modes were registered. No significant differences were seen between the groups in terms of fracture load. Failure modes were statistically significantly different among groups with significant correlation between restoration type and material. (p < 0.001 and p = 0.033, respectively). No group presented significantly higher fracture resistance. Although ceramic crowns and overlays presented the highest repairability, all restored ETT were within the range of the intact tooth' fracture strength.

    Conclusion

    No restoration presented significant different fracture loads. However, the type of restoration and material choice were correlated to the fracture mode.

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