"Comparative Stress Analysis of Hip Dysplasia"

描述(申请人提供)：这项研究将检查正常和发育不良患者的髋关节生物力学，特别是“传统”发育不良的患者和髋臼发育不良的患者。患者特有的有限元模型将被用来预测三组患者(正常、传统发育不良、逆行发育不良)的接触面积、最大软骨应力和最大骨应力及其位置。这项研究的理论基础源于这样一个事实，即髋臼发育不良可能是髋关节早产性骨关节炎的主要原因；然而，与不同类型的发育不良相关的几何改变与关节中由此产生的应力之间的确切关系尚不清楚。研究髋臼发育不良和髋关节骨关节炎发展之间关系的文献是相互矛盾的。本研究的总体目标是阐明正常髋关节、“传统”发育不良髋关节和髋关节发育不良患者在模拟单腿站立和爬楼梯时髋臼后倾的髋关节负荷和应力的生物力学差异。

DESCRIPTION (provided by applicant): This study will examine the biomechanics of the hip in normal and dysplastic patients, specifically focusing on patients with "traditional" dysplasia versus those with a dysplastic retroverted acetabulum. Patient-specific finite element models will be used to predict contact areas, maximum cartilage stresses and maximum bone stresses and their locations for three patient groups (normal, traditional dysplastic, retroverted dysplastic). The rationale for this study stems from the fact that acetabular dysplasia may be the leading cause of premature osteoarthritis of the hip; however, the exact relationships between the altered geometries associated with different types of dysplasia and the resulting stresses in the joint are poorly understood. The literature that has examined the relationships between acetabular dysplasia and development of hip osteoarthritis is contradictory. The overall objective of this study is to elucidate the biomechanical differences in hip joint loading and stresses in patients with normal hips, "traditional" dysplastic hips and hips with dysplasia characterized by retroversion of the acetabulum during simulated single-leg stance and stair climbing.