Modular acetabular reconstructive cup in acetabular revision total hip arthroplasty at a minimum ten year follow-up
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Modular acetabular reconstructive cups have been introduced in an attempt to offer initial rigid fixation by iliac lag screws and ischial pegs, to support bone grafts with a flanged metal socket, and to restore original hip center in acetabular revision. The purpose of this study was to clarify minimum ten year follow-up results of this cup system with morsellised allografts in revision cases.
We retrospectively investigated 54 acetabular revisions at a mean of 11 years (range, ten to 14 years). The indications were Paprosky’s type 2B (eight hip), 2C (eight hips), 3A (23 hips), 3B (nine hips), and 4 (six hips).
Using aseptic loosening as the endpoints, the survival rate was 89.3 % (95 % CI 81–98). Radiographically, one type 3A hip, three type 3B hips and one type 4 hip showed aseptic loosening while no type 2 hips or no cemented cups showed loosening.
The modular reconstructive cups for acetabular revision showed bone stock restoration and stable implantation.
KeywordsAseptic Loosening Acetabular Revision Pelvic Discontinuity Paprosky Type Morsellised Bone Graft
We thank Prof Hideki Yoshikawa for technical support.
Conflict of interest
No competing interests declared. Each author certifies that he or she, or a member of their immediate family, has no commercial associations that might pose a conflict of interest in connection with the submitted article.
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