Nagano H, Inoue H, Usui M, Mitani S, Satoh T
Department of Orthopaedic Surgery, Okayama University Medical School, Japan.
Bull Hosp Jt Dis. 1997;56(4):197-203.
We studied more than fifteen-years' follow-up results of cases treated with low-friction arthroplasty (LFA) for coxarthrosis with congenital hip dysplasia. Thirty-four LFAs in 32 patients (2 males and 30 females) were followed up for an average of 18.8 years (range: 15 to 23.3 years). The mean age at surgery was 53 years (range: 36 to 67 years). In three patients, 4 hips needed revision surgery due to loosening of the prostheses. At the final follow up, using Hodgkinson's criteria, type 0 demarcation of the socket appeared in 9 cases, type 1 in 5 cases, type 2 in 4 cases, type 3 in 4 cases, and type 4 in 12 cases. According to Harris' criteria, there was no sign of loosening of the stem in 16 cases, however there was a possibility of loosening in 8 cases, probability in 2 cases, and definite loosening in 8 cases. The survival rate with socket loosening as the end point was 76.5% at the 10 year follow-up, 67.6% at 15-years' follow-up, and 50.9% at 20-years' follow-up. The survival rate with stem loosening as the end point was 82.4% at 10-years' follow-up, 79.4% at 15-years' follow-up, and 63.8% at 20-years' follow-up. The survival rate with prostheses loosening either socket or stem as the end point was 64.7% at 10-years' follow-up, 55.9% at 15-years' follow-up, and 34.6% at 20-years' follow-up. The survival rate with revision surgery as the end point was 100% at 10-years' follow-up, 94% at 15-years' follow-up, and 85.1% at 20-years' follow-up.
我们研究了采用低摩擦关节成形术（LFA）治疗先天性髋关节发育不良性髋关节炎患者的超过15年的随访结果。32例患者（2例男性和30例女性）共34次LFA手术，平均随访18.8年（范围：15至23.3年）。手术时的平均年龄为53岁（范围：36至67岁）。3例患者中的4个髋关节因假体松动需要翻修手术。在最后随访时，根据霍奇金森标准，髋臼0型分界9例，1型5例，2型4例，3型4例，4型12例。根据哈里斯标准，16例股骨柄无松动迹象，8例有松动可能，2例有可能松动，8例有明确松动。以髋臼松动为终点的10年随访生存率为76.5%，15年随访生存率为67.6%，20年随访生存率为50.9%。以股骨柄松动为终点的10年随访生存率为82.4%，15年随访生存率为79.4%，20年随访生存率为63.8%。以髋臼或股骨柄假体松动为终点的10年随访生存率为64.7%，15年随访生存率为55.9%，20年随访生存率为34.6%。以翻修手术为终点的10年随访生存率为100%，15年随访生存率为94%，20年随访生存率为85.1%。
