Kawamoto K, Hasegawa Y, Iwase T, Iwasada S, Kanamono T, Iwata H
Department of Orthopaedic Surgery, Nagoya University School of Medicine, Japan.
Bull Hosp Jt Dis. 1998;57(3):130-5.
We performed cementless total hip arthroplasty on patients with secondary osteoarthrosis due to hip dysplasia. We conducted prospective radiographic and clinical studies on 75 hips with a minimum five-year follow-up. Aseptic loosening of the Dual geometry Microstructured cup used on the acetabular component was recognized in 2 of 75 hips within five years postoperatively, but neither case required revision. As for the femoral component, within five years of operation, in 9 of 28 (32%) and 11 of 31 (35%) patients, aseptic loosening was recognized in the Omnifit Normalized Smooth surfaced stem (FIT-N) and the Omniflex Normalized Smooth surfaced stem (FLEX-N), respectively, neither of which have a porous coating on their proximal end. Revisions of the stems have been conducted on three FIT-N and two FLEX-N stems. Aseptic loosening was recognized in 2 of 16 Omnifit Microstructured stems (FIT-M) with porous coating, but revisions have not yet been required in these cases. We conclude that stems without a porous surface coating should not be used for cementless total hip arthroplasty.
我们对因髋关节发育不良导致继发性骨关节炎的患者实施了非骨水泥型全髋关节置换术。我们对75例髋关节进行了前瞻性影像学和临床研究，随访时间至少为5年。在术后5年内，75例髋关节中有2例髋臼部件使用的双几何微结构杯出现无菌性松动，但两例均无需翻修。至于股骨部件，在术后5年内，Omnifit标准化光滑表面柄（FIT-N）组的28例患者中有9例（32%）、Omniflex标准化光滑表面柄（FLEX-N）组的31例患者中有11例（35%）出现无菌性松动，这两种柄的近端均无多孔涂层。已对3个FIT-N柄和2个FLEX-N柄进行了翻修。16个带有多孔涂层的Omnifit微结构柄（FIT-M）中有2例出现无菌性松动，但这些病例尚未需要翻修。我们得出结论，无多孔表面涂层的柄不应被用于非骨水泥型全髋关节置换术。
