Acetabular reinforcement rings in revision total hip arthroplasty. Midterm results in 298 cases

作者：Schlegel U J^*; Bitsch R G; Pritsch M; Aldinger P R; Mau H; Breusch S J

来源：Orthopade, 2008, 37(9): 904-+.

DOI：10.1007/s00132-008-1314-5

• acetabular revision
• acetabular reinforcement cage
• acetabular defect
• revision total hip arthroplasty
• bone graft

Background. Acetabular revision in total hip arthroplasty (THA), especially for loose or migrated cup components with collateral bone loss, remains a great surgical challenge. The aim should always be a functionally favorable reconstruction of the rotation center with sufficient load capacity of the acetabulum. Commonly used implants in Europe are the Mueller ring, the Ganz ring, and the Burch-Schneider cage.
Patients and Methods. We report our results of 298 patients (298 hips) with a median follow-up period of 4 (range 0-17) years in a retrospective series.
Results. Follow-up data were available in 224 cases (75%). A radiographic examination was performed in 176 (59%) patients. Another 54 patients (18%) had died in the follow-up period, while another three patients (1%) were lost to follow-up. Eighteen patients underwent re-revision, in nine cases for aseptic loosening and in the remaining nine cases for infection. In seven additional cases (2%), radiological and clinical failure was found during follow-up. The overall survival rate was 94% at 5 years and 89% at 8 years.
Conclusion. Revision THA using acetabular reinforcement rings results in acceptable midterm results, However, septic complications and lysis of the bone graft with consecutive failure of the reinforcement ring remain problematic.

• 出版日期2008-9
• 单位河北医科大学