Malmö University Publications
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  • 1.
    Hellén-Halme, Kristina
    et al.
    Malmö University, Faculty of Odontology (OD).
    Lith, Agneta
    Department of Oral and Maxillofacial Radiology, Institute of Odontology, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
    Shi, Xie-Qi
    Section of Oral and Maxillofacial Radiology, Department of Clinical Odontology, Faculty of Medicine, University of Bergen, Bergen, Norway.
    Reliability of marginal bone level measurements on digital panoramic and digital intraoral radiographs2020In: Oral Radiology/Springer, ISSN 0911-6028, E-ISSN 1613-9674, Vol. 36, no 2, p. 135-140Article in journal (Refereed)
    Abstract [en]

    OBJECTIVES: The aim of this study was to evaluate the reliability of bitewing and panoramic radiographs in marginal bone level measurements in terms of inter- and intra-observer agreement. METHODS: Fifty paired bitewing and panoramic images were used. Eight observers measured marginal bone level at the mesial and distal surfaces of tooth 25 and tooth 35. Thus, in total 100 radiographs of 400 measurements were obtained for each observer. To evaluate intra-observer agreement, three observers re-evaluated the radiographs after a minimum of 1 month. Intra-class correlation coefficient (ICC) was applied to evaluate the inter- and intra-observer agreement. The t test was applied to assess possible difference in measurement between bitewing and panoramic radiographs. RESULTS: The mean ICC value of inter-observer agreement was 0.85 for bitewing and 0.66 for panoramic radiographs. The mean intra-observer agreement was 0.92 and 0.76 for bitewing and panoramic radiographs, respectively. There was no statistically significant difference between bitewing and panoramic radiographs in measurements of marginal bone level on maxillary tooth 25, whereas a statistically significant difference was found between the two image modalities on mandible tooth 35. CONCLUSION: Bitewing examination should be the choice of image modality for assessment of marginal bone level at premolar region due to good to excellent reliability and low radiation dose. However if a panoramic radiograph already exists, a rough estimation of marginal bone level at premolar region is clinically acceptable bearing in mind that the bone height of the mandible premolar region might be overestimated as compared to bitewing radiograph.

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  • 2.
    Klinge, Anna
    et al.
    Malmö University, Faculty of Odontology (OD).
    Al-Okshi, Ayman
    Malmö University, Faculty of Odontology (OD). Department of Oral Medicine and Radiology, Sebha University, Sebha, Libyan Arab Jamahiriya.
    Becktor, Jonas P
    Malmö University, Faculty of Odontology (OD).
    Lindh, Christina
    Malmö University, Faculty of Odontology (OD).
    A rater agreement study on measurements in cross-sectional CBCT images exploring the association between alveolar bone morphology and craniofacial height2021In: Oral Radiology/Springer, ISSN 0911-6028, E-ISSN 1613-9674, Vol. 37, p. 573-584Article in journal (Refereed)
    Abstract [en]

    OBJECTIVES: To investigate rater agreement regarding measurements of height and width of the maxilla and mandible using cross-sectional images from CBCT examinations. Furthermore, to explore the association between vertical craniofacial height and alveolar bone morphology.

    METHODS: Pre-treatment CBCT scans from 450 patients referred for treatment to a private clinic for orthodontics and oral surgery in Scandinavia were available and of these, 180 were selected. Lateral head images were generated from the CBCT volumes to categorise subjects into three groups based on their craniofacial height. Cross-sectional images of the maxillary and mandibular bodies at three locations in the maxilla and mandible, respectively, were obtained and measured at one height and two width recordings by five raters. One-way analysis of variance with a Tukey post hoc test was performed. A significance level of 5% was used.

    RESULTS: Rater agreement was mostly excellent or good when measuring height and width of the maxilla and mandible in cross-sectional CBCT images. For height (of the alveolar bone/bodies), there were statistically significant differences between the low- and the high-angle groups for all the observers when measuring in the premolar and midline regions, both in the maxilla and in the mandible.

    CONCLUSION: The high agreement found ensures a reliable measurement technique and confirms the relation between craniofacial height and alveolar bone height and width.

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  • 3. Takano, Yumi
    et al.
    Honda, Kazuya
    Kashima, Masahiro
    Yotsui, Yoritaka
    Igarashi, Chinami
    Petersson, Arne
    Malmö högskola, Faculty of Odontology (OD).
    Magnetic Resonance Imaging of the Temporomandibular Joint: a Study of Inter- and Intraobserver Agreement2004In: Oral Radiology/Springer, ISSN 0911-6028, E-ISSN 1613-9674, Vol. 20, no 2, p. 62-67Article in journal (Other academic)
    Abstract [en]

    Objective. The purpose of this study was to estimate the inter- and intraobserver agreement for interpreting magnetic resonance (MR) images of the temporomandibular joint (TMJ). Methods. The study was based on MR images of 30 TMJs. The images were interpreted by seven observers for disk configuration, disk position, joint fluid, bone marrow changes, and diagnosis. The observers were not calibrated. Kappa statistics were used. Results. The kappa values were, for interobserver agreement of disk configuration, 0.10; for disk position in the sagittal plane with closed mouth, 0.35; for a combination of closed mouth and open mouth, 0.44; for disk position in the coronal plane, 0.17; for joint fluid 0.36; for bone marrow changes, 0.01; and for diagnosis, 0.39. Intraobserver agreement was generally higher than interobserver agreement. Conclusion. Agreement on disk position in the sagittal plane, on presence and amount of joint fluid, and on diagnosis was fair to moderate. Agreement on disk configuration, on disk position in the coronal plane, and on bone marrow changes was poor.

  • 4.
    Vicente, António
    et al.
    Malmö University, Faculty of Odontology (OD).
    Wiedel, Anna-Paulina
    Skane Univ Hosp, Dept Oral & Maxillofacial Surg, Malmö, Sweden.;Lund Univ, Dept Clin Sci Malmö, Malmö, Sweden..
    Becker, Magnus
    Lund Univ, Dept Clin Sci Malmö, Malmö, Sweden.;Skane Univ Hosp, Dept Plast & Reconstruct Surg, Malmö, Sweden..
    Brogårdh-Roth, Susanne
    Malmö University, Faculty of Odontology (OD).
    Shi, Xie-Qi
    Malmö University, Faculty of Odontology (OD). Univ Bergen, Dept Clin Dent, Sect Oral & Maxillofacial Radiol, Bergen, Norway..
    Hellén-Halme, Kristina
    Malmö University, Faculty of Odontology (OD). Univ Bergen, Dept Clin Dent, Sect Oral & Maxillofacial Radiol, Bergen, Norway..
    Quantitative assessment of cleft volume and evaluation of cleft's impact on adjacent anatomical structures using CBCT imaging2024In: Oral Radiology/Springer, ISSN 0911-6028, E-ISSN 1613-9674, Vol. 40, no 2, p. 295-303Article in journal (Refereed)
    Abstract [en]

    Objectives: To determine pre-operative cleft volume and evaluate cleft´s impact on surrounding anatomical structures in children and adolescents with orofacial clefts using cone bean computed tomography (CBCT) imaging.

    Methods: The present retrospective study retrieved CBCT examinations of 68 patients from a previous study. The examinations had been exposed either before (n = 53) or after (n = 15) alveolar bone grafting. Pre-operative volume of cleft was determined, and type and location were evaluated. Morphological changes on the adjacent anatomical structures, including the incisive foramen, the nasal septum and floor, and the inferior turbinate, were assessed.

    Results: Mean bilateral cleft volume was 0.76 cm3, while mean unilateral cleft volume was 1.08 cm3; the difference was significant (p < 0.001). Variation in cleft volume, however, was large. The incisive foramen was not visible in the majority of cases with bilateral clefts (71%); the difference was significant (p = 0.001). In cases with unilateral clefts, the nasal septum in 87% was curved towards the cleft or graft side. Also, the mean size of the widest part of the inferior turbinate was 8.8 mm on the cleft or graft side and 10.4 mm on the non-cleft side. The difference was significant (p < 0.001).

    Conclusions: When required, CBCT is a feasible method for quantitatively illustrating alveolar clefts and their impact on the morphological development of surrounding structures. Variation in cleft volume was large.

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