title: Allogeneic cancellous bone graft and a Burch-Schneider ring for acetabular reconstruction in revision hip arthroplasty.
abstract: BACKGROUND
  There is an ever-increasing number of failed hip arthroplasties associated with massive deficiency of acetabular bone stock consisting of a segmental or cavitary defect. This study was undertaken to evaluate the long-term results after use of morselized cryopreserved allogeneic bone graft and an antiprotrusio cage to treat such a deficiency.
  
  
  METHODS
  From January 1, 1988, to January 1, 1994, forty-one patients (forty-one hips) with an acetabular defect classified as type IIl or IV according to the American Academy of Orthopaedic Surgeons system were operated on with use of a Burch-Schneider ring and morselized cryopreserved allogeneic cancellous bone graft. Thirty-eight patients (thirty-eight hips) were available for clinical and radiographic follow-up examinations at an average of 7.3 years (range, 4.2 to 9.4 years) after surgery.
  
  
  RESULTS
  All measured clinical parameters had improved significantly by the time of the follow-up examination (p < 0.0001). Radiographs confirmed that none of the thirty-eight hips had any measurable migration or displacement of the acetabular component and that osseous consolidation occurred only within the grafted area in all patients.
  
  
  CONCLUSIONS
  Acetabular reconstruction with use of morselized cryopreserved allogeneic cancellous bone graft and the Burch-Schneider ring can be highly successful in managing massive acetabular deficiencies in revision hip arthroplasty.
authors.affiliation: Berufsgenossenschaftliche Unfallklinik, Trauma Center, University of Tuebingen, Germany.
authors.forename: E
authors.initials: E
authors.lastname: Winter
authors.forename: M
authors.initials: M
authors.lastname: Piert
authors.forename: R
authors.initials: R
authors.lastname: Volkmann
authors.forename: F
authors.initials: F
authors.lastname: Maurer
authors.forename: C
authors.initials: C
authors.lastname: Eingartner
authors.forename: K
authors.initials: K
authors.lastname: Weise
authors.forename: S
authors.initials: S
authors.lastname: Weller
mesh_terms: D000077:Acetabulum / Q000473:pathology / Q000601:surgery*; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip; D016025:Bone Transplantation; D015925:Cryopreservation; D005260:Female; D005500:Follow-Up Studies; D006621:Hip Joint / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D008875:Middle Aged; D017060:Patient Satisfaction; D011183:Postoperative Complications; D011859:Radiography; D019651:Plastic Surgery Procedures; D012086:Reoperation