高龄患者使用羟基磷灰石广泛涂层股骨假体的中期随访

目的评价以羟基磷灰石(HA)广泛涂层假体进行初次人工髋关节置换的中期效果。方法1997年2月～1999年5月,对96例以HA广泛涂层股骨假体的初次置换患者进行临床和放射学随访研究,主要评价Harris评分、大腿疼痛和并发症,以Kaplan-Meier法评价股骨假体的使用寿命。结果60例患者获得平均8年(7～9年)随访,Harris评分从术前的平均42分提高到术后的90分,仅2例大腿疼痛。无其它并发症发生,未见假体柄周围放射学透亮线,所有假体均获得骨性稳定,并出现重新塑型。假体8年生存率达100%。结论HA广泛涂层股骨假体具有骨传导作用,可抗轴向力和抗扭转力,且手术风险低,能够获得较好的同定。

Mid-term follow-ups of hydroxyapatite extensively-coated femoral prosthesis for elderly patients

Objective To evaluate the effects of hydroxyapatite (HA) extensively-coated prosthesis on elderly patients undergoing hip arthroplasty.Methods From February 1997 to May 1999,96 patients Were treated with hydroxyapatite (HA) coated prosthesis and followed up for their hip arthroplasty.Their results were studied clinically and roentgengraphically to evaluate chiefly their Harris scores,complications and thigh pain.The survival of prosthesis was evaluated according to Kaplan-Meier methods.Results The 60 cases were followed up for eight years on average(range,sevon to nine years).Their mean Harris scores were improved from 42 preoperatively to 90 postoperatively.Fifty-eihgt cases felt no pain at their hip,but two did at their thigh.No radiolucent lines were observed.All the prostheses achieved bony stabilization and remolding.Conclusions HA coated prosthesis can achieve fine fixation,because it helps bone conduction,resists axial force and torsion,and reduces operative risks.