Abstract
Acetabular reconstructions using acetabular reinforcement ring with hook were analyzed after an average follow-up period of 19.6 months (range: 2-28 months) in 9 patients/hips. The deficiencies, according to the American Academy of Orthopaedic Surgeons classification, were 2 segmental, 4 cavitary and 3 combined cavitary and segmental. Bone grafts were packed into bone defects, a hook was placed around the bone in the acetabular notch and then a reinforcement ring was fixed with cancellous screws. Postoperative management was with partial weight-bearing on 2 crutches usually starting one week after surgery. Radiographic evaluation revealed acetabular component migration of more than 2mm in 1 hip. The overall Japan Orthopaedic Association score (JOA score) of 36.5 points improved to a follow-up examination score of 73.6 points. Short-term results were good. In arthroplasty with bone stock of poor quality and quantity, the reinforcement ring with hook serres as a good method for reconstructing the acetabulum.
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