Mavcic B, Antolic V, Brand R, Iglic A, Kralj-Iglic V, Pedersen D R
Department of Orthopedic Surgery, Clinical Center Ljubljana, Slovenia.
Pflugers Arch. 2000;440(5 Suppl):R177-8.
The contact stress in a human hip is not uniform and it changes with different body positions. The changing location of the peak contact stress during gait may indicate the predilection sites for further development of osteoarthritis in the hip. On the basis of laboratory measurements and by using mathematical models of forces and stresses in human hip we determined the points of the peak contact stress in successive phases of gait. Results show that the peak stress points are mostly located in the posterior-medial portion of the weight bearing area, which corresponds well to the clinical observations. It is also shown that in the pathological conditions of hip dysplasia the peak contact stress trajectory is located more laterally and anteriorly.
人体髋关节中的接触应力并不均匀，且会随身体姿势的不同而变化。步态过程中峰值接触应力位置的变化可能表明髋关节骨关节炎进一步发展的好发部位。基于实验室测量并利用人体髋关节力与应力的数学模型，我们确定了步态连续阶段中峰值接触应力的点。结果表明，峰值应力点大多位于负重区的后内侧部分，这与临床观察结果非常吻合。研究还表明，在髋关节发育不良的病理状况下，峰值接触应力轨迹位于更外侧和前方。
