Histomorphometric comparison of implant anchorage for two types of dental implants after 3 and 6 months' healing in baboon jaws

Statement of problem. A complete understanding of dental implant prognosis requires better knowledge of the bone anatomy after implant healing. Such b aseline data are necessary to compare against load-induced changes in anato my. Purpose. The purpose of this article is to describe and compare measures of implant support (percentage [%] integration and percentage [%] bone area) for various implants in baboon jaws after healing times of 3 and 6 months. Material and methods. Commercially pure titanium (cpTi) and titanium alloy (Ti-alloy) screw-shaped implants were placed in the posterior jaws of 9 fem ale baboons after 2 months of postextraction healing. Specimens were harves ted after 3 months (5 baboons: 8 cpTi, 7 Ti-alloy) and after 6 months (4 ba boons: 8 cpTi, 8 Ti-alloy). Each implant provided 6 polished horizontal sec tions for data collection, which was accomplished from digitized images wit h the IMAGE analysis system (reliability at 1.6%). Three- and six month dat a for each parameter were compared with the use of ANOVA (P<.01). Conclusion. A time-dependent increase in jawbone anchorage M as measured in this nonhuman primate population, and it was shown that the 6-month maxill ary data were comparable to the 3-month mandibular data. These results lend support to the. clinical strategy of waiting longer to load implants in th e maxilla.