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Chemically modified titanium-zirconium implants in comparison with commercially pure titanium controls stimulate the early molecular pathways of bone healing
Malmö högskola, Faculty of Odontology (OD).ORCID iD: 0000-0001-7488-3588
Malmö högskola, Faculty of Odontology (OD).
Oral Implant Center, Tokushima University Hospital, Tokushima, Japan.
Institut Straumann AG, Basel, Switzerland.
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2017 (English)In: Clinical Oral Implants Research, ISSN 0905-7161, E-ISSN 1600-0501, Vol. 28, no 10, p. 1234-1240Article in journal (Refereed) Published
Abstract [en]

OBJECTIVES: Titanium-zirconium (TiZr) has been proposed as a mechanically stronger alternative to commercially pure titanium for oral and orthopaedic implants. However, not much is known on the osseointegration kinetics of TiZr surfaces. In this study, we aimed to identify the genetic response of bone around TiZr implants compared to pure Ti. MATERIAL AND METHODS: Microtextured and hydrophilic TiZr implants (tests) and cpTi implants grade IV (controls) were placed in the tibia of 30 New Zealand white rabbits. At 2, 4 and 12 weeks, the implants were subjected to removal torque test (RTQ). The expression of a panel of genes involved in the process of osseointegration was measured in the bone around the test and control implants by means of quantitative real-time polymerase chain reaction (PCR) and compared to the control samples. RESULTS: The controls yielded statistically significant higher RTQ at 4 weeks, but the RTQ of the tests had a larger increase between 4 and 12 weeks, when both groups reached similar values. The gene expression analysis showed that all selected markers for bone formation, bone remodelling and cytokines were significantly upregulated around TiZr implants after 2 weeks. After 4 weeks of healing, two bone formation markers were significantly more expressed in the test samples, while at 12 weeks, the expression of all genes was similar in the two groups. CONCLUSIONS: TiZr implants showed comparable biomechanical outcomes to cpTi up to 12 weeks of healing. However, at early healing stages, they showed a significant upregulation of osteogenesis and osteoclastogenesis markers.

Place, publisher, year, edition, pages
Blackwell Munksgaard, 2017. Vol. 28, no 10, p. 1234-1240
Keywords [en]
gene expression, osseointegration, Ti alloys, Ti-Zr, Titanium–zirconium, oral implants, bone healing
National Category
Dentistry
Identifiers
URN: urn:nbn:se:mau:diva-15747DOI: 10.1111/clr.12947ISI: 000412649200019PubMedID: 27531124Scopus ID: 2-s2.0-84994157855Local ID: 23091OAI: oai:DiVA.org:mau-15747DiVA, id: diva2:1419269
Available from: 2020-03-30 Created: 2020-03-30 Last updated: 2024-06-17Bibliographically approved

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Galli, SilviaJimbo, RyoNaito, YoshihitoWennerberg, Ann

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