Trabecular bone remodeling around smooth and porous implants in an equine patellar model.
Trabecular bone remodeling around smooth and porous implants in an equine patellar model.
复制标题
马髌骨模型中光滑多孔植入物周围的骨小梁重塑。
DOI：
10.1016/0021-9290(87)90029-7
复制
发表时间：
1987
影响因子：
2.4
通讯作者：
W. Hayes
中科院分区：
文献类型：
--
作者：
E. Cheal;B. Snyder;D. Nunamaker;W. Hayes
本研究的目的是研究不同表面特征的种植体周围骨小梁的应力-形态关系。将具有抛光表面或烧结珠多孔涂层的不锈钢球单侧植入马膝骨内，并维持6个月。采用体视学方法对骨小梁形态进行量化，并对骨小梁应力进行有限元分析。一般说来，光滑种植体周围的重塑反应比那些表现出骨长入的多孔种植体周围的重塑反应更大。根据这些差异，有限元模型预测了由于非线性边界条件，光滑种植体附近的应力变化较大。然而，在其最简单的形式下，轨迹理论似乎并不适用于植入物诱导的重塑。骨面密度的变化与von Mise有效应力的变化之间的线性关系支持了松质骨的结构与最佳结构相对应的假说。结果还表明，在某些情况下，应力状态的微小变化可能会导致主材料取向的大变化。
The objective of this investigation was to examine the stress-morphology relationships for trabecular bone around implants with different surface characteristics. Stainless steel spheres with either a polished surface or a sintered-bead porous coating were implanted unilaterally into equine patellae and maintained for a 6 month period. Stereological methods were used to quantify the trabecular bone morphology and finite element analyses were performed to predict the trabecular bone stresses. In general, the remodeling response around the smooth implants was greater than that around those porous implants that exhibited bone ingrowth. In accordance with these differences, the finite element models predicted greater changes in the stresses adjacent to the smooth implants due to the nonlinear boundary conditions. However, it did not appear that the trajectorial theory, in its simplest form, was applicable to the remodeling induced by the implants. A linear relationship between the change in bone areal density and the change in von Mises effective stress provides support for the hypothesis that the architecture of trabecular bone corresponds to an optimal structure. The results also demonstrated that, under certain circumstances, small changes in the stress state may result in large changes in the principal material orientation.
DOI：
10.2106/00004623-198365050-00001
发表时间：
1983-01-01
影响因子：
5.3
作者：
GOLDRING, SR;SCHILLER, AL;HARRIS, WH
通讯作者：
HARRIS, WH
影响因子：
2.4
作者：
BROWN, TD;RADIN, EL;BURR, DB
通讯作者：
BURR, DB