We present our experience from use of acetabular reinforcement rings in revision total hip arthroplasty when bone defects are present. From 1987 to 2000, acetabular reinforcement rings were utilized in 59 revisions, in 52 patients with a mean age of 60 years (31–81). In 48 hips, Ganz rings were used and in 11 hips, Burch-Sch-neider rings. For the existing defects of the acetabulum, morsellized bone allograft was used. The patients were evaluated clinically with the modified Merle d’ Aubigne-Postel scale and radiologically with the criteria of Gill-Sledge-Muller. Acetabular reconstruction was successful in 51 of 59 hips (86.5%) after a mean follow-up period of 7 years (2–15). One of the 11 Burch-Schneider rings failed (9.1%) and 7 of the 48 Ganz, raising the failure rate of this ring up to 14.6%. Complications included dislocation in 5 cases, deep vein thrombosis in 2, superficial infection in 1 and pubis rami fracture in 2 cases. Reinforcement rings in our opinion could be of valuable help in reconstruction of the bone deficient acetabulum. Although in this study, it is not possible for these two rings to be directly compared, Burch-Schneider one appears to have a more clear role and lower failure rate. However, in order to evaluate in a more reliable way the true fate of the acetabular reinforcement rings, especially in the presence of the limited role of biological fixation, longer follow-up time is needed.
Ligament stabilizing procedures were done in 46 (54,1%) patients who had ACL deficient knees (18 reconstructions in Group C and 38 in Group F). Only longitudinal lesions in the red/red or red/white zone were repaired. Follow-up averaged 12.3 months with a range from 6 to 25 months. Only longitudinal lesions in the red/red or red/white zone were repaired. Patients were evaluated using clinical examination, the “OAK” knee evaluation scheme and Magnetic Resonance Imaging. Criteria for clinical success included absence of joint line tenderness, swelling and a negative McMurray test.
