Analysis of bone formation around the ankie after total ankie replacement using cell-automaton method

元胞自动机法分析全踝关节置换术后踝关节周围骨形成

基本信息

批准号：
08671674
负责人：
TAKEUCHI Ryohei
金额：
$ 1.41万
依托单位：
YOKOHAMA CITY UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

项目摘要

1) Stress analysis around facets of the lower limb considering the interaction between the knee joint, ankle joint and the subtalar joint was performed. Quantative estimation of the effect of the geometric parameters on the stress on the facet was secondary analized. And fnally, development of a optimization method of the osteotomy angle for the knee osteotomy.Finite element analysis was used to study the mechanical behavior for the knee and ankle joints of osteoarthritis. It was made clear that the mechanical environment of each joint interacted with one another. An optimization method of SOM was proposed to carry out a quantatitive atudy of the mechanical conditions of the joint, and the resultant contact force on the medial of the knee was evaluated as the key objective function of the mechanical condition for the joint, and an estimation expression of P was established using SOM.Based upon the expression of P, the optimum angles alpha of the osteotomy were calcukated to be 20.4 degrees for the case of knee osteoarthritis, and to be 22.3 degrees for the case of knee osteoarthritis accompanied by ipsilateral ankle osteoarthritis. It was found that these values of alpha correspond very well with the clinical examples.2) Stress analysis was performed aroud the ankle joint and the surface of the tbial component of the artificial total ankle system produced by Nara University to disperse * the stress concentration, using finite element method and the optimization method of SOM.It was found that the tibial component would be improved with the width of the anchor was 15.6mm, hight was 4.5mm and slope was 60 degrees.

1）考虑膝关节，踝关节和底部关节之间的相互作用，下肢的分节周围的应力分析。几何参数对应力对方面的影响的影响的定量估计是次要分析的。而且，用于膝盖截骨术的截骨术角的优化方法的开发。用于研究骨关节炎的膝关节和脚踝关节的机械行为。清楚地表明，每个关节的机械环境相互相互作用。提出了一种优化的SOM的优化方法，以对关节的机械条件进行定量，并评估膝盖内侧的接触力作为该关节机械条件的关键客观函数，并使用p的估计估计为p的估计表达，以p的表达为p的表达，以p的表达，最佳的aptee n. ostem a is osTepy of osTepy of osTepy of osTempha of osTempha of osTem s of osTempha of osTem ote os osTepy of osTem s的optecuk of osTeuk of osTeuk of osTem s的最佳效果。骨关节炎，膝盖骨关节炎的病例为22.3度，伴有同侧踝骨关节炎。结果发现，这些α值与临床实例非常相对应。坡度为60度。