Department of Anatomy, Tokyo Dental College, Chiba, Japan.
Clin Oral Investig. 2010 Oct;14(5):507-13. doi: 10.1007/s00784-009-0332-y. Epub 2009 Aug 18.
The aim of this study was to identify the load transfer paths in cortical bone and trabecular structure of cancellous bone in the jawbones for loads from endosseous implants. Maxillae were resected from beagle dogs 6 months after implant surgery and imaged using micro-computed tomography (micro-CT). A three-dimensional structure was produced based on the CT data and peri-implant trabecular structure was observed. Load transfer paths were analyzed from the results of three-dimensional finite element analysis. Furthermore, buffer actions in bone trabeculae when strain increased during stress analysis and when loads were applied were observed. Peri-implant bone trabeculae were seen extending into the upper and lower cortical bone from the fixture. The direction of bone trabecular alignment corresponded with the load transfer paths. In addition, analysis with increased strain confirmed that trabecular structures could serve as load buffers. These results suggest that bone trabeculae supporting load transfer from implants undergo remodeling.
本研究旨在确定颌骨中皮质骨和松质骨小梁结构中的负荷传递路径，以传递来自骨内种植体的负荷。在种植术后 6 个月，从比格犬切除上颌骨，并使用微计算机断层扫描（micro-CT）进行成像。基于 CT 数据生成三维结构，并观察种植体周围的小梁结构。从三维有限元分析的结果分析负荷传递路径。此外，在应变分析过程中以及在施加负荷时观察到骨小梁的缓冲作用。可以看到种植体周围的骨小梁从固定器延伸到上下皮质骨。骨小梁的排列方向与负荷传递路径相对应。此外，增加应变的分析证实，小梁结构可以作为负荷缓冲器。这些结果表明，支撑来自种植体的负荷传递的骨小梁经历了重塑。
