Kawarai Yuya, Iida Satoshi, Nakamura Junichi, Shinada Yoshiyuki, Suzuki Chiho, Ohtori Seiji
Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba City, Chiba, 260-8677, Japan.
Department of Orthopaedic Surgery, Matsudo City Hospital , 4005 Kamihongou, Matsud City, Chiba, 271-8511, Japan.
Int Orthop. 2017 Dec;41(12):2487-2493. doi: 10.1007/s00264-017-3521-3. Epub 2017 May 31.
The purpose of this study was to clarify the difference in implant alignment between the direct anterior approach (DAA) and the anterolateral approach in the supine position (ALS).
A retrospective comparative study consisted of 215 consecutive primary total hip arthroplasties using tapered polished and straight cemented-stems via two different minimally invasive approaches (DAA group in 106 hips and ALS group in 109 hips).
The cup radiographic anteversion angle was significantly lower in the ALS group than in the DAA group (12.9° versus 16.9°, p = 0.001). The frequency of the safe zone tended to be more favourable in the ALS group than in the DAA group (95% versus 87%, p = 0.052). Stem alignment in the sagittal plane was significantly better in the ALS group than in the DAA group (84% versus 71%, p = 0.022).
Both cup and stem alignments were better in the ALS group than the DAA group.
本研究旨在阐明直接前路（DAA）与仰卧位前外侧入路（ALS）在植入物对线方面的差异。
一项回顾性比较研究，纳入了215例连续的初次全髋关节置换术，通过两种不同的微创入路（106髋为DAA组，109髋为ALS组）使用锥形抛光和直柄骨水泥型股骨柄。
ALS组髋臼X线片前倾角显著低于DAA组（12.9°对16.9°，p = 0.001）。ALS组安全区的频率倾向于比DAA组更有利（95%对87%，p = 0.052）。ALS组矢状面的股骨柄对线显著优于DAA组（84%对71%，p = 0.022）。
ALS组的髋臼和股骨柄对线均优于DAA组。
