IADR Abstract Archives
Effects of Different Drilling Protocols on Osseointegration Performance and Implant Stability Measurement
Objectives: In order to obtain a higher initial implant stability, modifying the drilling protocol is the most common method. However, the influence of different drilling protocols on biomechanical characteristics and bone healing capacities of dental implants was unclear. Thus, the aim of this study was to evaluate the effects of these drilling protocols on changes of osseointegration performance and implant stability during the healing period.
Methods: Twenty-four New Zealand white rabbits were used in this study. Three experimental groups with different surgical protocols (undersized preparation, standard and oversized preparation) were designed. Measurement of implant stability parameters was performed immediately after implant insertion and then at 2, 4 and 8 weeks after the operation. After 0, 2, 4, and 8 weeks of healing, the animals were sacrificed and the bone block with implant fixture were prepared for histomophometric analysis.
Results: The preliminary results of the present study demonstrated that the ISQ values of each group increased gradually through the implant healing time. In the damping factor analysis, the opposite tendency was observed and gradually decreased. The histomorphometric analysis revealed that BIC (bone-implant contact) increased with time until 8 weeks of healing. In addition, the undersized group has the highest initial BIC (25.16%±7.25%) and the lowest values were found in oversized group (9.13%±5.89%). The BIC values of these groups also gradually increased during the healing period. However, no significant difference was found in BIC values among these experimental groups at week 8.
Conclusions: In conclusion, the undersized surgical protocol group seemed to have the highest bone to implant contact and primary stability in the whole healing period. These results also suggested that the individual measurement of implant stability using RFA or DF should be performed with caution and used in combination with other objective methods or clinical parameters.
Methods: Twenty-four New Zealand white rabbits were used in this study. Three experimental groups with different surgical protocols (undersized preparation, standard and oversized preparation) were designed. Measurement of implant stability parameters was performed immediately after implant insertion and then at 2, 4 and 8 weeks after the operation. After 0, 2, 4, and 8 weeks of healing, the animals were sacrificed and the bone block with implant fixture were prepared for histomophometric analysis.
Results: The preliminary results of the present study demonstrated that the ISQ values of each group increased gradually through the implant healing time. In the damping factor analysis, the opposite tendency was observed and gradually decreased. The histomorphometric analysis revealed that BIC (bone-implant contact) increased with time until 8 weeks of healing. In addition, the undersized group has the highest initial BIC (25.16%±7.25%) and the lowest values were found in oversized group (9.13%±5.89%). The BIC values of these groups also gradually increased during the healing period. However, no significant difference was found in BIC values among these experimental groups at week 8.
Conclusions: In conclusion, the undersized surgical protocol group seemed to have the highest bone to implant contact and primary stability in the whole healing period. These results also suggested that the individual measurement of implant stability using RFA or DF should be performed with caution and used in combination with other objective methods or clinical parameters.