Chemically modified titanium-zirconium implants in comparison with commercially pure titanium controls stimulate the early molecular pathways of bone healing

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Chemically modified titanium-zirconium implants in comparison with commercially pure titanium controls stimulate the early molecular pathways of bone healing

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Publication Article, peer reviewed scientific
Title Chemically modified titanium-zirconium implants in comparison with commercially pure titanium controls stimulate the early molecular pathways of bone healing
Author Galli, Silvia ; Jimbo, Ryo ; Naito, Yoshihito ; Berner, Simon ; Dard, Michel ; Wennerberg, Ann
Date 2016
English abstract
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.
DOI https://doi.org/10.1111/clr.12947 (link to publisher's fulltext)
Link http://onlinelibrary.wiley.com/doi/10.1111/clr.129... (external link to publication)
Publisher Blackwell Publishing
Host/Issue Clinical Oral Implants Research;
ISSN 0905-7161
Pages 7
Language eng (iso)
Subject gene expression
osseointegration
Ti alloys
Ti-Zr
Titanium–zirconium
oral implants
bone healing
Medicine
Research Subject Categories::ODONTOLOGY
Handle http://hdl.handle.net/2043/23091 Permalink to this page
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