title: Circumferential proximal femoral allografts in revision hip arthroplasty: four to 20 years follow-up.
abstract: OBJECTIVE
  The purpose of this study was to analyze the clinical and radiographic results of revision of loose total hip replacements, using proximal femoral allografts and a cemented implant.
  
  
  METHODS
  We retrospectively reviewed of 28 consecutive patients. Twenty patients were available for study. Each patient was scored using a modified Harris Hip Score. Radiographs were examined for endosteal and periosteal reabsorption, allograft-host union, trochanteric migration, component loosening and heterotrophic calcification.
  
  
  RESULTS
  The mean pre-operative Harris hip Score was 34 points. At the latest follow-up, the meanscore was 80 points. Nineteen cases (95%) had combined femoral defects and one patient (5%) had a segmental defect, according to the AAOS classification. Allograft resorption was seen in eight (40%) hips. There were 18 cases (90%) of allograft union, one (5%) of partial union and one (5%) of nonunion. There was one case of trochanteric migration (more than 1 cm). All femoral components were radiographically stable. The reconstruction was considered successful in 18 patients (90%).
  
  
  CONCLUSIONS
  The use of proximal femoral allografts in femoral revision of loose total hip replacements has high survival and satisfactory clinical results at an average period of eight years postoperatively.
authors: The Orthopaedic Hospital of Passo Fundo, Faculty of Medicine, University of Passo Fundo, Passo Fundo, RS, Brazil. broos@pop.com.br
authors: Bruno Dutra
authors: BD
authors: Roos
authors: Milton Valdomiro
authors: MV
authors: Roos
authors: Antero
authors: A
authors: Camisa
mesh_terms: D000328:Adult; D000368:Aged; D064591:Allografts; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D005260:Female; D005269:Femur / Q000473:pathology / Q000637:transplantation; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D009999:Ossification, Heterotopic; D011475:Prosthesis Failure; D012189:Retrospective Studies; D016896:Treatment Outcome