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Micro-computed tomographic evaluation of osseointegration of trabecular dental implants in a rabbit model

Purpose: To evaluate the osseointegration at the coronal and apical threaded parts of TrabecularMetal (TM) dental implants using micro-CT and comparing it to Tapered Screw Vent (TSV) dentalimplants.Materials and methods: Ten rabbits were included in this study. Each rabbit received oneTM implant (3.7 × 10 mm) inserted into the right distal femoral condyle as a test group, and oneTSV implant of the same length and diameter inserted into the left distal femoral condyle as acontrol. Two parts from each implant, the apical and coronal threaded parts to the porous tantalumtrabecular material, were selected for the analysis using micro CT.Results: There were significantly higher mean values for the amount of bone implant contactand bone volume at the apical part of the TM implants when compared with the TSV implants,while there was no significant difference at the coronal part.Conclusion: The presence of the porous tantalum trabecular material more toward the apicalpart have created a favourable osteoconductive environment that has reflected on a higher amountof bone implant contact and bone volume at the apical threaded part of the TM implants than thatof the equivalent part of the TSV implants.