Normal hip joint contact pressure distribution in single-leg standing - effect of gender and anatomic parameters
Normal hip joint contact pressure distribution in single-leg standing - effect of gender and anatomic parameters
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DOI：
10.1016/s0021-9290(01)00041-0
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发表时间：
2001-07-01
影响因子：
2.4
通讯作者：
Chao, EYS
中科院分区：
文献类型：
--
作者：
Genda, E;Iwasaki, N;Chao, EYS
研究患者髋关节接触力/压力分布的一种实用且易于使用的分析技术，将有助于评估异常生物力学状况和解剖畸形对关节接触应力的影响，从而制定治疗计划。该技术还可以帮助建立不同年龄组男女髋关节接触压力分布的规范数据库。计算了正常人群（女性41例，男性15例）髋关节的12个解剖参数和7个生物力学参数。研究了参数间的相关性。采用三维离散元分析（DEA）技术计算髋关节压力分布。通过假设股骨头和髋臼表面为球形，从二维x线片估计髋关节的三维接触几何形状。股骨头粗隆比（HT）、股骨头半径、骨盆高度、关节接触面积、标准化峰值接触压力、外展力、关节接触力在男女之间存在显著差异。归一化峰值接触压力与髋臼覆盖率和头粗隆比相关。在正常变化范围内，外展力方向的改变对关节峰值接触压力没有影响。然而，在模拟发育不良的情况下，当CE角较小或为负时，外展肌方向在关节接触压力估计中变得非常敏感。所建立的模型和结果可作为骨盆或股骨截骨术术前计划的计算机模拟参考依据。2001爱思唯尔科学有限公司版权所有。
A practical and easy-to-use analysis technique that can study the patient's hip joint contact force/pressure distribution would be useful to assess the effect of abnormal biomechanical conditions and anatomical deformities on joint contact stress for treatment planning purpose. This technique can also help to establish the normative database on hip joint contact pressure distribution in men and women in different age groups. Twelve anatomic parameters and seven biomechanical parameters of the hip joint in a normal population (41 females, 15 males) were calculated. The inter-parameter correlations were investigated. The pressure distribution in the hip joint was calculated using a three-dimensional discrete element analysis (DEA) technique. The 3D contact geometry of the hip joint was estimated from a 2D radiograph by assuming that the Femoral head and the acetabular surface were spherical in shape. The head-trochanter ratio (HT), femoral head radius, pelvic height, the joint contact areal the normalized peak contact pressure, abductor force, and the joint contact force were significantly different between men and women. The normalized peak contact pressure was correlated both with acetabular coverage and head-trochanter ratio. Change of abductor force direction within normal variation did not affect the joint peak contact pressure. However, in simulated dysplastic conditions when the CE angle is small or negative, abductor muscle direction becomes very sensitive in joint contact pressure estimation. The models and the results presented can be used as the reference base in computer simulation for preoperative planning in pelvic or femoral osteotomy. (C) 2001 Elsevier Science Ltd. All rights reserved.