Surface Characterization and In Vivo Evaluation of Dual Acid-Etched and Grit-Blasted/Acid-Etched Implants in Sheep. Issue 3 (June 2015)

• Record Type: Journal Article
• Authors: Yoo, Daniel; Marin, Charles; Freitas, Gileade; Tovar, Nick; Bonfante, Estevam A.; Teixeira, Hellen S.; Janal, Malvin N.; Coelho, Paulo G.
• Is Part Of: Implant dentistry. Volume 24:Issue 3(2015:Jun.)
• Publication Date: 2015-06
• Subjects: surface -- dental implants -- biomechanical -- osseointegration; Dental implants -- Periodicals; 617.69305
• DOI: 10.1097/ID.0000000000000248
• Languages: English
• ISSNs: 1056-6163

Abstract

Abstract : Purpose: Dual acid-etching is widely used to modify dental implant topography and enhance early bone healing. This study evaluated the histomorphometric, biomechanical, and histological bone response to acid-etched (AA) in comparison with grit-blasted/acid-etched (GB) and machined control (C) implants within sites of relatively low-bone remodeling rates. Materials and Methods: Implant surface topography was evaluated by scanning electron microscopy and optical interferometry (IFM). Six adult male sheep (n = 6) received 72 Ti-6Al-4V implants (n = 24 per surface) in both ilium (n = 12 per bone bilaterally). The implants remained for 3 and 6 weeks in vivo . The histomorphometric parameters bone-implant contact (BIC) and bone area fraction occupancy (BAFO) were evaluated. Biomechanical analysis consisted of torque-to-interface failure. Results: IFM analysis showed the highest average surface roughness for GB and the highest density of summits and developed surface area percentage ( P < 0.01) for AA. No difference was observed in BAFO for all groups in 3 and 6 weeks. Increased BIC and torque resistance were observed for AA implants at both time points after implantation. Conclusions: Overall, improved bone-to-implant response was observed for the AA implant surface.