Is Combined Anteversion Equally Affected by Acetabular Cup and Femoral Stem Anteversion?
Is Combined Anteversion Equally Affected by Acetabular Cup and Femoral Stem Anteversion?
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是否相同地受到髋臼杯和股骨茎前的影响的合并后的合并？
DOI：
10.1016/j.arth.2021.02.017
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发表时间：
2021-07
期刊：
影响因子：
--
通讯作者：
Dorr LD
中科院分区：
文献类型：
--
作者：
Pour AE;Schwarzkopf R;Patel KP;Anjaria M;Lazennec JY;Dorr LD
为了创建一个安全区，需要了解髋关节运动过程中股骨和髋臼的结合情况。我们研究了在模拟髋关节运动过程中股骨头在髋臼内衬内的位置。我们假设髋臼杯和股骨柄前倾角对髋关节活动和联合髋关节前倾角的影响不同。使用MATLAB软件模拟髋关节植入物在站立、坐位、坐立、前屈、下蹲和旋转位置的运动。穿过柄颈中心和假体头中心的线在假体头的极轴（PA）处引出。当假体股骨头和内衬平行时，PA面向内衬中心（PA位置= 0，0）。通过以1度增量模拟髋关节运动，测量PA距内衬中心的最大距离及其运动方向（极坐标系统）。改良髋臼杯和股骨柄前倾角对髋臼内衬内PA变化的方向和距离的影响不同。在坐位、从坐到站、下蹲和前倾期间，股骨柄前倾对内衬内PA位置的影响大于髋臼杯前倾（p = 0.0001）。即使在比较具有不同颈角的股骨柄时，这种效应也很明显（p = 0.0001）。髋臼杯前倾角、股骨柄前倾角和股骨柄颈干角以不同方式影响内衬内PA位置和组合前倾角。因此，在评估不同日常活动期间的髋关节运动时，仅关注髋臼杯方向是不够的。
To create a safe zone, an understanding of the combined femoral and acetabular mating during hip motion is required. We investigated the position of the femoral head inside the acetabular liner during simulated hip motion. We hypothesized that cup and stem anteversion do not equally affect hip motion and combined hip anteversion. Hip implant motion was simulated in standing, sitting, sit-to-stand, bending forward, squatting, and pivoting positions using the MATLAB software. A line passing through the center of the stem neck and the center of the prosthetic head exits at the polar axis (PA) of the prosthetic head. When the prosthetic head and liner are parallel, the PA faces the center of the liner (PA position = 0,0). By simulating hip motion in 1-degree increments, the maximum distance of the PA from the liner center and the direction of its movement was measured (polar coordination system). The effect of modifying cup and stem anteversion on the direction and distance of the PA’s change inside the acetabular liner were different. Stem anteversion influenced the PA position inside the liner more than cup anteversion during sitting, sit-to-stand, squatting, and bending forward (p = 0.0001). This effect was evident even when comparing stems with different neck angles (p = 0.0001). Cup anteversion, stem anteversion, and stem neck-shaft angle affected the PA position inside the liner and combined anteversion in different ways. Thus, focusing on cup orientation alone when assessing hip motion during different daily activities is inadequate.
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影响因子：
3.5
作者：
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