Torisu T, Utsunomiya K, Maekawa M, Ueda Y
Department of Orthopaedic Surgery, Medical College of Oita, Japan.
Clin Orthop Relat Res. 1990 Feb(251):119-25.
Bipolar hip arthroplasty was performed on 557 hips from December 1980 to June 1988. The clinical results and serial roentgenograms of 37 hips with acetabular deficiency, treated by arthroplasty from December 1980 to June 1983, were followed for a minimum of five years. The longest follow-up period was seven years and six months after the operation. The clinical score was assessed by the hip rating score of the Japanese Orthopaedic Association, which assigns a maximum of 100 points. The preoperative clinical score ranged from 24 to 56 points (mean, 42.2 points). The postoperative score improved to a range of 71-100 points (mean, 82.7 points). Of 37 hips examined, 31 hips were pain-free. As measured from the serial roentgenograms after the operation, the overall distance of central migration of the prosthesis in 37 hips was 0-5 mm, with an average of 1.4 mm, two years after the operation. At the five-year follow-up evaluation, 27 of 37 hips showed no additional central migration. The overall distance of superior migration of the prosthesis in 37 hips was from 0 to 8 mm, with an average of 2.6 mm, two years after the operation. Additional superior migration was noticed in 18 of 37 hips (48.6%) at the time of this five-year follow-up evaluation.
1980年12月至1988年6月期间，对557例髋关节进行了双极人工髋关节置换术。对1980年12月至1983年6月期间接受人工关节置换术治疗的37例髋臼发育不良的髋关节的临床结果和系列X线片进行了至少五年的随访。最长随访期为术后七年零六个月。临床评分采用日本骨科协会的髋关节评分系统，满分100分。术前临床评分范围为24至56分（平均42.2分）。术后评分提高到71 - 100分（平均82.7分）。在检查的37例髋关节中，31例无疼痛。术后两年，根据系列X线片测量，37例髋关节假体中心性移位的总距离为0至5毫米，平均1.4毫米。在五年随访评估时，37例髋关节中有27例未出现额外的中心性移位。术后两年，37例髋关节假体上移的总距离为0至8毫米，平均2.6毫米。在本次五年随访评估时，37例髋关节中有18例（48.6%）出现了额外的上移。
