Department of Osteonecrosis and Hip Surgery, the Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, P.R. China.
J Int Med Res. 2020 May;48(5):300060520925999. doi: 10.1177/0300060520925999.
This study was performed to compare the clinical outcomes and performance of the collum femoris-preserving (CFP) stem (Waldemar Link GmbH & Co., Hamburg, Germany) and the Tri-Lock stem (DePuy Orthopaedics, Warsaw, IN, USA) in terms of femoral offset (FO) and leg length reconstruction.
Clinical and radiographic data of patients who underwent total hip arthroplasty with either a CFP stem or Tri-Lock stem from January 2016 to March 2017 were compared (65 and 57 patients, respectively). The Harris hip score and Western Ontario and McMaster Universities Osteoarthritis Index were recorded. The FO, femoral vertical offset, and neck-shaft angle were measured at the last follow-up. The occurrence of dislocation and periprosthetic fracture during the follow-up period was recorded.
The CFP stem induced significantly more FO than did the Tri-Lock stem on the operated side than contralateral side (3.63 ± 4.28 vs. 0.83 ± 5.46 mm). Significantly fewer patients had a >5-mm decrease in FO on the unaffected side in the CFP stem group ( = 1) than Tri-Lock stem group ( = 10).
Both stems similarly improved hip function and reconstructed the leg length, but the CFP stem was superior to the Tri-Lock stem in reconstructing FO.
本研究旨在比较保留股骨颈（CFP）柄（德国汉堡 Waldemar Link GmbH & Co.）和 Tri-Lock 柄（美国印第安纳州 Warsaw DePuy Orthopaedics）在股骨偏心距（FO）和下肢长度重建方面的临床结果和性能。
比较了 2016 年 1 月至 2017 年 3 月接受全髋关节置换术的 CFP 柄和 Tri-Lock 柄患者的临床和影像学资料（分别为 65 例和 57 例）。记录 Harris 髋关节评分和西部安大略省和麦克马斯特大学骨关节炎指数。在末次随访时测量 FO、股骨垂直偏心距和颈干角。记录随访期间脱位和假体周围骨折的发生情况。
与对侧相比，CFP 柄在手术侧引起的 FO 显著增加（3.63 ± 4.28 对 0.83 ± 5.46 毫米）。在 CFP 柄组中，仅有 1 名患者在未受影响侧的 FO 减少超过 5 毫米，明显少于 Tri-Lock 柄组（10 名）。
两种柄均能明显改善髋关节功能和重建下肢长度，但 CFP 柄在重建 FO 方面优于 Tri-Lock 柄。
