Schwarz Julia, Yeroushalmi David, Hepinstall Matthew, Buckland Aaron J, Schwarzkopf Ran, Meftah Morteza
Orthopedics. 2023 Jan-Feb;46(1):e27-e30. doi: 10.3928/01477447-20221003-04. Epub 2022 Oct 6.
Accurate and reproducible acetabular component positioning is among the most important technical factors affecting outcomes of total hip arthroplasty. Although several studies have investigated the influence of pelvic tilt and obliquity on functional acetabular anteversion, the effect of pelvic axial rotation has not yet been established. We analyzed a generic simulated pelvis created using preoperative full-body standing and sitting radiographs. A virtual acetabulum was placed in 144 different scenarios of acetabular anteversion and abduction angles. In each scenario, the effects of pelvic tilt and pelvic axial rotation on different combinations of acetabular orientations were assessed. The change in acetabular anteversion was 0.75° for each 1° of pelvic tilt and was most linear in abduction angles of 40°±45°. The change in acetabular anteversion was 0.8° for each 1° of pelvic axial rotation. Surgeons may consider adjusting acetabular anteversion in fixed axial pelvic deformities when the degree of deformity affects functional acetabular positioning, assessed from preoperative standing and sitting weight-bearing radiographs. [. 2023;46(1):e27-e30.].
准确且可重复的髋臼组件定位是影响全髋关节置换术结果的最重要技术因素之一。尽管有多项研究调查了骨盆倾斜和倾斜度对功能性髋臼前倾角的影响，但骨盆轴向旋转的影响尚未确定。我们分析了使用术前全身站立和坐立位X线片创建的通用模拟骨盆。在144种不同的髋臼前倾角和外展角情况下放置虚拟髋臼。在每种情况下，评估骨盆倾斜和骨盆轴向旋转对不同髋臼方向组合的影响。骨盆每倾斜1°，髋臼前倾角变化0.75°，在40°±45°的外展角时变化最呈线性。骨盆每轴向旋转1°，髋臼前倾角变化0.8°。当根据术前站立和坐立位负重X线片评估畸形程度影响功能性髋臼定位时，外科医生在固定的轴向骨盆畸形中可能需要考虑调整髋臼前倾角。[. 2023;46(1):e27-e30.]
