Seki M, Yuasa N, Ohkuni K
Department of Orthopaedic Surgery, Akita Red Cross Hospital, Akita City, Japan.
J Orthop Res. 1998 Jul;16(4):513-7. doi: 10.1002/jor.1100160418.
A three-dimensional computer-aided design model of a total hip replacement was used to study the effects of anteversion and abduction of the acetabular component and anteversion and varus-valgus angulation of the femoral component on the range of hip flexion and extension that could be obtained without component impingement. Impingement of the component was defined as impingement between the neck of the femoral component and the edge of the acetabular component. To achieve an angle of hip flexion greater than 90 degrees and an extension angle greater than 30 degrees without component impingement, the optimal angulations were found to be between 1 and 30 degrees of anteversion and 30 and 50 degrees of abduction of the acetabular component, as well as 10 degrees of anteversion of the femoral component. When the valgus angulation of the femoral component was reduced from 7 to 0 degrees, the allowable range of flexion without impingement increased under the same conditions of acetabular-component orientation and femoral-component anteversion. Significant inverse correlations were found between the anteversion angle of the acetabular component and both the lumbar lordosis angle and the sacrohorizontal angle.
使用全髋关节置换的三维计算机辅助设计模型，研究髋臼组件的前倾角和外展角以及股骨组件的前倾角和内翻-外翻角度对在无组件撞击情况下可获得的髋关节屈伸范围的影响。组件撞击定义为股骨组件颈部与髋臼组件边缘之间的撞击。为了在无组件撞击的情况下实现髋关节屈曲角度大于90度且伸展角度大于30度，发现最佳角度为髋臼组件前倾角在1至30度之间、外展角在30至50度之间，以及股骨组件前倾角为10度。当股骨组件的外翻角度从7度减小到0度时，在髋臼组件方向和股骨组件前倾角相同的条件下，无撞击时的允许屈曲范围增加。发现髋臼组件的前倾角与腰椎前凸角和骶水平角之间存在显著的负相关。
