성견의 상악골에 식립한 다양하게 표면처리된 임프란트의 안정성에 대한 비교 평가

Abstract

Purpose: This study was performed to investigate the histologic and histomorphometric findings of 2 different types of implant surface after installation in the posterior region of maxilla in dogs.

Materials and Methods: Before placing implants, all molar teeth of dogs were extracted under general anesthesia. After 1 month, RBM (resorbable blasting media) and SLA (sandblasted with larger grit and acid etched) surface implants (24 fixtures in each group) were installed under general anesthesia. The initial stability was measured using Periotest (PTV; periotest value). After 6 or 12 weeks, PTV was measured again, and fixtures with surrounding bone tissue were harvested for histologic and histomorphometric analysis.

Results: The average initial stability of SLA surface group (-1.71±2.9) was higher than that of RBM surface group (-1.25±3.21), but there was no significant difference between 2 groups. The PTV were much increased at 6 and 12 weeks compared to initial, and the mean PTV of RBM surface was higher than SLA surface at 12 weeks between 2 groups. In histomorphometric analysis, the average bone-implant contact of SLA and RBM surface group were 67.6%±16.0 at 6 weeks, 82.7%±8.6 at 12 week in SLA surface groups, and 69.9%±17.6 at 6 weeks, 78.3%±9.2 at 12 weeks in RBM surface group, respectively.

Conclusion: Taken together, SLA and RBM surface implants were demonstrated good stabilities and good healing processes of surrounding bone in the maxillary posterior region, therefore the 2 domestic implants could be seen predictable results clinically after installation.