Shishido Takaaki, Tateiwa Toshiyuki, Takahashi Yasuhito, Masaoka Toshinori, Ishida Tsunehito, Yamamoto Kengo
Department of Orthopedic Surgery, Tokyo Medical University, 6-7-1, Nishishinjuku, Shinjuku-ku, Tokyo 160-0023, Japan.
Department of Bone and Joint Biomaterial Research, Tokyo Medical University, 6-7-1, Nishishinjuku, Shinjuku-ku, Tokyo 160-0023, Japan.
J Orthop. 2018 Jan 16;15(1):134-137. doi: 10.1016/j.jor.2018.01.008. eCollection 2018 Mar.
We investigated the effects of varus-valgus alignment on the long-term outcomes after cementless total hip arthroplasty (THA) using a porous coated version of Bi-Metric femoral stems. The Kaplan-Meier survival analysis was performed in 71 hips. The survival rate with femoral revision for aseptic loosening as the end point was 100% at 17 years. Nevertheless, the initial stem alignment was more valgus in patients with the Engh grade III-IV stress shielding than patients with the Engh grade I-II. Our results suggest that valgus misalignment of cementless Bi-Metric stem might be a potential risk factor for the progression of stress shielding.
我们使用双尺寸多孔涂层股骨柄,研究了内翻-外翻对线对非骨水泥型全髋关节置换术(THA)长期疗效的影响。对71例髋关节进行了Kaplan-Meier生存分析。以无菌性松动翻修股骨为终点的17年生存率为100%。然而,与Engh I-II级患者相比,Engh III-IV级应力遮挡患者的初始柄对线更呈外翻。我们的结果表明,非骨水泥双尺寸柄的外翻对线可能是应力遮挡进展的一个潜在危险因素。