IADR Abstract Archives
Osseointegration of Dental Implants Utilizing Osseodensification Technique
Objectives: The purpose of this study was to evaluate implant osseointegration when utilizing osseodensification drilling technique.
Methods: Machined(M) or acid-etched(A) surface implants were implanted in sheep hip through one of the following instrumentation techniques: R (regular as recommended by manufacturer), CW (Versah drill clockwise), and CCW (Versah drill counterclockwise). Implant insertion torque was recorded at the time of implant placement. The implants remained in vivo for a period of 3 and 6 weeks, and following sacrifice were referred to nondecalcified histologic processing. Statistical analyses were performed by a mixed model ANOVA(at an alpha=0.05) where implant surface and instrumentation technique were the independent variables and torque, bone-to-implant contact (BIC), and bone area fraction occupancy (BAFO) were the dependent variables.
Results: Irrespective of implant surface, insertion torque data showed significant differences between CCW (highest), CW (intermediate), and R (lowest) instrumentation techniques (p<0.001). Evaluation of BIC depicted a significant effect of implant surface (A>M, p<0.001), and that M implants instrumented through CCW and CW techniques presented BIC levels similar to all A implant surfaces irrespective of instrumentation. BAFO significantly increased as a function of time in vivo (p=0.014). Histomorphologic evaluation depicted new bone formation in proximity (between threads) and in direct contact with all implants surfaces placed under all instrumentation techniques. A different morphology was observed around CW and CCW instrumented implants as instrumentation bone fragments acted as nucleating sites for new bone apposition.
Conclusions: Osseodensification technique proved to be beneficial for increasing implant insertion torque during placement without being detrimental to the natural course of osseointegration.
Methods: Machined(M) or acid-etched(A) surface implants were implanted in sheep hip through one of the following instrumentation techniques: R (regular as recommended by manufacturer), CW (Versah drill clockwise), and CCW (Versah drill counterclockwise). Implant insertion torque was recorded at the time of implant placement. The implants remained in vivo for a period of 3 and 6 weeks, and following sacrifice were referred to nondecalcified histologic processing. Statistical analyses were performed by a mixed model ANOVA(at an alpha=0.05) where implant surface and instrumentation technique were the independent variables and torque, bone-to-implant contact (BIC), and bone area fraction occupancy (BAFO) were the dependent variables.
Results: Irrespective of implant surface, insertion torque data showed significant differences between CCW (highest), CW (intermediate), and R (lowest) instrumentation techniques (p<0.001). Evaluation of BIC depicted a significant effect of implant surface (A>M, p<0.001), and that M implants instrumented through CCW and CW techniques presented BIC levels similar to all A implant surfaces irrespective of instrumentation. BAFO significantly increased as a function of time in vivo (p=0.014). Histomorphologic evaluation depicted new bone formation in proximity (between threads) and in direct contact with all implants surfaces placed under all instrumentation techniques. A different morphology was observed around CW and CCW instrumented implants as instrumentation bone fragments acted as nucleating sites for new bone apposition.
Conclusions: Osseodensification technique proved to be beneficial for increasing implant insertion torque during placement without being detrimental to the natural course of osseointegration.