Bergmann G, Correa da Silva M, Neff G, Rohlmann A, Graichen F
Oskar-Helene-Heim, Biomechanics Laboratory, Orthopaedic Hospital of the Free University, Berlin, Germany.
Clin Biomech (Bristol). 1994 Jul;9(4):225-34. doi: 10.1016/0268-0033(94)90003-5.
The reduction of hip joint forces by ischial weight-bearing orthoses, used for the treatment of Legg-Perthes and other joint diseases, was measured in vivo in a patient with two instrumented endoprostheses. Three different types of orthoses reduced hip joint loading by about 30%, independent of their cuff design and the position in which the femur was held. The direction of the joint forces was changed in such a way that the size of the load-carrying joint areas decreased by up to 3.4% with two conventional orthoses. With the third model with improved containment of the femoral head this area increased by up to 8.2%. All the orthoses studied support the pelvis too close to the affected joint, leading to insufficient load reduction. A design concept is proposed which prevents tilting of the pelvis in the frontal plane and may improve the force reduction at the hip joint.
在一名植入了两个带传感器的假体的患者体内，测量了用于治疗Legg-Perthes病和其他关节疾病的坐骨承重矫形器对髋关节力的降低情况。三种不同类型的矫形器均可使髋关节负荷降低约30%，这与它们的袖带设计以及股骨固定位置无关。关节力的方向发生了改变，使用两种传统矫形器时，承载负荷的关节面积大小减少了3.4%。使用第三种能更好容纳股骨头的模型时，该面积增加了8.2%。所研究的所有矫形器对骨盆的支撑都过于靠近患侧关节，导致负荷降低不足。提出了一种设计理念，可防止骨盆在额状面倾斜，并可能改善髋关节处的力降低效果。
