Abstract
Aims: Acetabular reinforcement rings have been designed to deal with severe acetabular bone deþciencies in revision arthroplasty of the hip. We report midterm results of 3 different designs. Methods: Between 1986 and 2001, 346 ace-tabular revisions with reinforcement rings were performed at our institution. 20 Burch-Schneider Cages, 135 Ganz and 191 Mueller Rings were implanted. Average Age of the patients at the time of the intervention was 67 years (range 27–93 years). The average follow-up was 4 years (range 1–15 years). Bone defects were classiþed according to the AAOS-Classiþcation. Homologous allografts were used in most cases to reconstruct the acetabulum. Three different techniques were used for allograft preparation: Bone chips, bulk and morselized allografts. Results: Clinical results were moderate in most cases as multiple revisions or other disabling conditions have inßuenced the outcome. Mid-term survival was > 90% at 4 years. An attempt was made to correlate aseptic loosening with allograft preparation methods. Conclusions: Satisfactory results can be achieved at midterm using all three devices. However resorption of allografts leading to migration, dislocation or failure remain a major concern when acetabular reconstruction is used in revision hip arthroplasty.
Theses abstracts were prepared by Professor Dr. Frantz Langlais. Correspondence should be addressed to him at EFORT Central Office, Freihofstrasse 22, CH-8700 Küsnacht, Switzerland.
