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EARLY FEMORAL LOOSENING IN ONE DESIGN OF CEMENTED HIP REPLACEMENT

S. N. Massoud, FRCS I, Orthopaedic Registrar; J. B. Hunter, FRCS Orth, Consultant Orthopaedic Surgeon; B. J. Holdsworth, FRCS, Consultant Orthopaedic Surgeon; W. A. Wallace, FRCS Ed(Orth), Professor of Orthopaedic and Accident Surgery; and R. Juliusson, MD, Orthopaedic Registrar

Queen’s Medical Centre, Nottingham NG7 2UH, UK.

Correspondence should be sent to Mr S. N. Massoud.

We have studied aseptic loosening of the femoral component in 76 patients with primary total hip replacement using the Capital prosthesis. The mean follow-up was 26 months (10 to 37).

Twelve femoral components (16%) were definitely and eight (10%) were possibly loose. They were characterised by a thin cement mantle (p < 0.001) and excessive residual cancellous bone in the proximomedial region (p < 0.01).

We recommend that the cement mantle around the prosthesis should be 2 to 3 mm and that further long-term studies are needed to evaluate the wear properties of titanium-nitride-coated titanium femoral heads.




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Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General