Department of Anatomy, Tokyo Dental College, 1-2-2 Masago, Mihama-ku, Chiba-shi, Chiba 261-8502, Japan.
Dent Mater J. 2013;32(3):425-32. doi: 10.4012/dmj.2012-281.
The aim of this study was to clarify the influence of shear modulus on the analytical accuracy in peri-implant jaw bone simulation. A 3D finite element (FE) model was prepared based on micro-CT data obtained from images of a jawbone containing implants. A precise model that closely reproduced the trabecular architecture, and equivalent models that gave shear modulus values taking the trabecular architecture into account, were prepared. Displacement norms during loading were calculated, and the displacement error was evaluated. The model that gave shear modulus values taking the trabecular architecture into account showed an analytical error of around 10-20% in the cancellous bone region, while in the model that used incorrect shear modulus, the analytical error exceeded 40% in certain regions. The shear modulus should be evaluated precisely in addition to the Young modulus when considering the mechanics of peri-implant trabecular bone structure.
本研究旨在阐明切变模量对种植体周围颌骨模拟分析精度的影响。基于包含种植体的颌骨图像获得的微 CT 数据，制备了三维有限元（FE）模型。制备了精确模型，该模型精确再现了小梁结构，以及考虑小梁结构的切变模量等效模型。计算了加载过程中的位移范数，并评估了位移误差。考虑小梁结构的切变模量等效模型在松质骨区域的分析误差约为 10-20%，而在使用错误切变模量的模型中，某些区域的分析误差超过 40%。在考虑种植体周围小梁骨结构力学时，除杨氏模量外，还应精确评估切变模量。
