应用锥形沟槽式股骨组配柄假体行全髋关节翻修术的中期疗效

目的 探讨应用锥形沟槽设计的股骨组配柄假体行全髋关节股骨侧假体翻修术的中期疗效.方法 2000年5月至2005年8月采用锥形沟槽式股骨组配柄假体行全髋关节翻修术19例,男6例,女13例;年龄47～86岁,平均67岁.单髋17例,双髋2例.术前诊断均为股骨柄和臼杯假体无菌性松动合并股骨侧骨缺损,按Paprosky标准诊断为Ⅱ型缺损4髋,Ⅲa型缺损14髋,Ⅲb型缺损3髋.股骨侧翻修均采用锥形沟槽式股骨组配柄假体(Lima-Lto,意大利),髋臼侧均采用SPH臼杯假体(LimaLto,意大利)行生物学固定.关节头臼界面采用陶瓷-陶瓷组合17髋,金属-聚乙烯组合4髋.结果 全部病例随访5～10年,平均7年.Harris髋关节评分由术前平均(46.2±15.2)分改善至翻修术后半年平均(90.3±5.3)分,末次随访平均(92.2±3.5)分.X线片显示翻修柄获广泛骨长入骨性固定者20髋(95%,20/21),纤维性稳定者1髋(5%,1/21).假体下沉0～10 mm,平均2.4 mm.随访期间无一例因假体松动或其他原因需行再次翻修.结论 采用锥形沟槽式股骨组配柄假体行伴有PaproskyⅡ型、Ⅲa和Ⅲb型骨缺损的股骨侧假体翻修术,可获得理想的初始稳定和永久生物学固定,中期随访疗效满意.

Abstract：

Objective To evaluate the midterm results of the revision total hip replacement with a fluted and tapered modular stem. Methods Nineteen patients (21 hips) underwent revision total hip arthroplasty from May 2000 to August 2005 were reviewed. There were 13 females and 6 males, with an average age of 67 years. Pre-revision diagnosis included aseptic loosening of the cups and stems associated with femoral defects (Paprosky classification) type Ⅱ 4 hips (19%), type Ⅲa 14 hips (67%), and type Ⅲb 3 hips (14%). The adopted acetabular component was SPH (Lima-Lto, Italy), and femoral component was a fluted and tapered modular stem (Lima-Lto, Italy). Clinical and radiographic evaluations were performed postoperatively. Results The mean follow-up was 7 years (range, 5-10). The Harris hip score improved from 46.2±15.2 preoperatively to 90.3±5.3 postoperatively, and maintain 92.2±3.5 at the latest follow-up. The X-ray films showed bone ingrowths fixation in 20 hips (95%) and fibrous stable fixation in 1 hip (5%). The average stem subsidence was 2.4 mm (range, 0-10 mm). There were no re-revisions of the femoral stem for any reason. Conclusion The midterm results of revision total hip replacement with a fluted and tapered modular stem in Paprosky type Ⅱ, Ⅲ a, Ⅲ b femoral defect associated aseptic loosening of the femoral stem was encouraging.

Intermediate term results of revision total hip replacement with a fluted, and tapered modular stem

Objective To evaluate the midterm results of the revision total hip replacement with a fluted and tapered modular stem. Methods Nineteen patients (21 hips) underwent revision total hip arthroplasty from May 2000 to August 2005 were reviewed. There were 13 females and 6 males, with an average age of 67 years. Pre-revision diagnosis included aseptic loosening of the cups and stems associated with femoral defects (Paprosky classification) type Ⅱ 4 hips (19%), type Ⅲa 14 hips (67%), and type Ⅲb 3 hips (14%). The adopted acetabular component was SPH (Lima-Lto, Italy), and femoral component was a fluted and tapered modular stem (Lima-Lto, Italy). Clinical and radiographic evaluations were performed postoperatively. Results The mean follow-up was 7 years (range, 5-10). The Harris hip score improved from 46.2±15.2 preoperatively to 90.3±5.3 postoperatively, and maintain 92.2±3.5 at the latest follow-up. The X-ray films showed bone ingrowths fixation in 20 hips (95%) and fibrous stable fixation in 1 hip (5%). The average stem subsidence was 2.4 mm (range, 0-10 mm). There were no re-revisions of the femoral stem for any reason. Conclusion The midterm results of revision total hip replacement with a fluted and tapered modular stem in Paprosky type Ⅱ, Ⅲ a, Ⅲ b femoral defect associated aseptic loosening of the femoral stem was encouraging.