Tsukeoka Tadashi, Tsuneizumi Yoshikazu, Lee Tae Hyun
Department of Orthopaedic Surgery, Chiba Rehabilitation Center, Japan.
J Arthroplasty. 2015 Aug;30(8):1393-6. doi: 10.1016/j.arth.2015.03.030. Epub 2015 Mar 31.
Computed tomography scans of 50 dysplastic hips were obtained and reconstructed using preoperative planning software for total hip arthroplasty. The anteversion of the stem implanted parallel to the line connecting the trochanteric fossa and the middle of the medial cortex of the femoral neck (T line) was measured. The cutting heights of 5mm and 10mm above the lesser trochanter were simulated. The mean difference of the anteversion of the stem using the T line and the native femoral anteversion was 2.7° (95% CI: 1.0°-4.5°) and 3.5° (95% CI: 1.5°-5.5°) at cutting heights of 5mm and 10mm respectively. An anteversion using a T line is compatible with native femoral anteversion even in developmental dysplasia of the hip.
获取了50例发育不良髋关节的计算机断层扫描图像，并使用全髋关节置换术前规划软件进行重建。测量了与连接转子窝和股骨颈内侧皮质中部的线（T线）平行植入的假体柄的前倾角。模拟了小转子上方5mm和10mm的截骨高度。在截骨高度为5mm和10mm时，使用T线的假体柄前倾角与股骨自然前倾角的平均差值分别为2.7°（95%可信区间：1.0°-4.5°）和3.5°（95%可信区间：1.5°-5.5°）。即使在发育性髋关节发育不良中，使用T线的前倾角也与股骨自然前倾角相符。
