Department of Orthopaedic Surgery, Teikyo University School of Medicine, Kaga, Itabashi-ku, Tokyo, Japan.
J Arthroplasty. 2013 Oct;28(9):1644-7. doi: 10.1016/j.arth.2013.02.014. Epub 2013 Apr 6.
The orientation of the acetabular component after total hip arthroplasty is expressed with inclination angle and anteversion angle (VA). We studied the differences in accuracy and precision between VA measured on AP radiographs of the pelvis and those measured on cross-table lateral radiographs when compared to the gold standard measurements on CT using a supine functional pelvic plane as reference. VA was measured for 66 hips at one week after surgery on an AP radiograph of the pelvis (VAP), a cross-table lateral radiograph of the hip (VCL), and CT of the pelvis. Mean (± SD) of error was 2.8° ± 4.1° for VCL, and -0.57° ± 3.1° for VAP. VAP showed a higher accuracy and precision than VCL. For measurements of VA, we recommend that they be made on an AP radiograph of the pelvis rather than a cross-table lateral radiograph of the hip.
全髋关节置换术后髋臼假体的方向用倾斜角和前倾角（VA）来表示。我们研究了与 CT 上的金标准测量值相比，在仰卧位功能骨盆平面作为参考时，骨盆前后位 X 线片和髋关节交叉侧位 X 线片上测量的 VA 在准确性和精密度方面的差异。在术后一周，我们在骨盆前后位 X 线片（VAP）、髋关节交叉侧位 X 线片（VCL）和骨盆 CT 上对 66 个髋关节的 VA 进行了测量。VCL 的平均（± SD）误差为 2.8°±4.1°，VAP 为-0.57°±3.1°。VAP 的准确性和精密度均高于 VCL。对于 VA 的测量，我们建议在骨盆前后位 X 线片上进行，而不是在髋关节交叉侧位 X 线片上进行。
