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  • Effect of Surface Modificat...
    Suzuki, Marcelo, DDS; Calasans-Maia, Monica D., DDS, PhD, MS; Marin, Charles, DDS, MS; Granato, Rodrigo, DDS, MS; Gil, Jose N., DDS, PhD, MS; Granjeiro, Jose M., DDS, PhD; Coelho, Paulo G., DDS, PhD

    Journal of oral and maxillofacial surgery, 07/2010, Letnik: 68, Številka: 7
    Journal Article

    Purpose The objective of the present study was to evaluate the biomechanical fixation and bone-to-implant contact (BIC) of plateau root form implants of varied surfaces. Materials and Methods Plateau root form implants, 3.5 mm in diameter, 8 mm in length, with 4 surfaces (n = 16 each)—machined, alumina-blasted/acid-etched, alumina-blasted/acid-etched plus nanothickness bioceramic coating, and plasma-sprayed calcium-phosphate—were used. They were bilaterally placed at the distal femur of 16 New Zealand rabbits and remained in place for 2 and 4 weeks in vivo. After euthanizing the rabbits, the implants were subjected to torque to interface fracture and were subsequently processed as nondecalcified ∼30-μm-thickness slides for histomorphologic analysis and BIC determination. Statistical analysis was performed using analysis of variance at the 95% level of significance, considering implantation time and implant surface as independent variables and the torque-to-interface fracture and BIC as dependent variables. Results The torque-to-interface fracture was significantly affected by the implant surface ( P < .001) but was not affected by the implantation time ( P > .20). The implantation time and implant surface had significant effects on the BIC ( P < .04 and P < .001, respectively). The greatest torque-to-interface fracture and BIC was observed for the plasma-sprayed calcium-phosphate. Conclusion The implant surface significantly influenced early bone healing around plateau root form implants.