大直径股骨头金属对金属全髋关节置换术的近期临床疗效

目的 评价大直径股骨头(大头)金属对金属全髋关节置换术治疗晚期髋关节疾病的近期疗效,回顾性分析影响该类全髋关节置换术临床疗效的因素.方法 对2007年10月至12月,采用大头金属对金属全髋关节置换术治疗晚期髋关节疾病患者41例(49髋)进行术后随访.临床评估以Harris评分为标准,记录患髋的活动范围及并发症发生情况.影像学评估根据随访骨盆X线片及患髋正、侧位X线片,测量髋臼外展角、前倾角,记录髋臼和股骨假体周围透亮线和骨溶解情况.结果 截至随访终点,共39例(47髋)获得2年以上随访,平均随访25个月,随访率为95.1%.Harris评分由术前的(43.8±13.1)分提高到末次随访时的(92.0±5.4)分.患髋活动度较术前明显改善,术后3个月屈髋由79.8°增加至110.2°,外展由20.9°增加至38.3°,外旋由12.0°增加至26.0°;术后2年屈髋平均可达113.2°,外展可达40.2°,外旋可达30.8°.术后患者轻度跛行3例,大腿不适2例,所有患者均无感染、假体周围骨折、术后假体松动或脱位、术后异位骨化发生.X线片显示:关节假体位置正常,髋臼假体外展角为39.5°±4.9°,前倾角为14.5°±2.1°,髋臼未见松动、移位.术后均未发现透亮线和假体周围骨溶解.结论 大头金属对金属全髋关节置换术治疗髋关节疾病具有良好的近期疗效,特别适用于活动量大、预期寿命较长的年轻患者.

Abstract：

Objective To evaluate clinical and radiographic outcomes associated with total hip arthroplasty (THA) using metal-on-metal prosthesis with large diameter femoral head.Methods From October 2007 to December 2007,41 patients (49 hips) underwent large diameter femoral head metal-on-metal THA in our hospital were involved in this study.Clinical outcomes measures were Harris score,hip range of motion and incidence of complications.Abduction angle and anteversion angle of cup were measured on radiological films.The radiolucent line and osteolysis around the prosthesis were also recorded.Results Thirty-nine patients (47 hips) were followed up at least 2 years.The average Harris hip score had improved from (43.8±13.1) points preoperatively to (92.0±5.4) points at final follow-up.All the patients had attained satisfactory results.No late complication happened.For the rang of motion at final follow-up:flexion of the hip had improved from 79.8° to 113.2°,abduction had improved from 20.9° to 40.2°,external rotation had improved from 12.0° to 30.8°.Radiological measurement showed the mean abduction angle of cup was 39.5°±4.9°,the mean anteversion angle of cup was 14.5°±2.1°.No radiolucent line and osteolysis were found after THA.Conclusion The short-term effects of THA using metal-on-metal prosthesis with large diameter femoral head is encouraging,especially for young patients.

Short-term effects of total hip arthroplasty using metal-on-metal prosthesis with large diameter femoral head

Objective To evaluate clinical and radiographic outcomes associated with total hip arthroplasty (THA) using metal-on-metal prosthesis with large diameter femoral head.Methods From October 2007 to December 2007,41 patients (49 hips) underwent large diameter femoral head metal-on-metal THA in our hospital were involved in this study.Clinical outcomes measures were Harris score,hip range of motion and incidence of complications.Abduction angle and anteversion angle of cup were measured on radiological films.The radiolucent line and osteolysis around the prosthesis were also recorded.Results Thirty-nine patients (47 hips) were followed up at least 2 years.The average Harris hip score had improved from (43.8±13.1) points preoperatively to (92.0±5.4) points at final follow-up.All the patients had attained satisfactory results.No late complication happened.For the rang of motion at final follow-up:flexion of the hip had improved from 79.8° to 113.2°,abduction had improved from 20.9° to 40.2°,external rotation had improved from 12.0° to 30.8°.Radiological measurement showed the mean abduction angle of cup was 39.5°±4.9°,the mean anteversion angle of cup was 14.5°±2.1°.No radiolucent line and osteolysis were found after THA.Conclusion The short-term effects of THA using metal-on-metal prosthesis with large diameter femoral head is encouraging,especially for young patients.