TM implants afforded better clinical outcomes and greater patient satisfaction than antiprotrusion cages in the treatment of severe acetabular defects.

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Introduction: The management of massive femoral bone defects following prosthetic infection remains a surgical challenge, particularly when the entire femur is affected. Methods: We present the first results of a new biarticular cement spacer with antibiotic technique using a cephalomedullary nail for the treatment of infected hip arthroplasty involving complete femoral bone loss. Results: 5 patients with a minimum follow-up of 1 year were included. In all cases 2-stage replacement due to hip periprosthetic infection was carried out, with the need for a biarticular complete femoral spacer in view of the magnitude of the bone defect. The infection was resolved in all patients, with no complications (spacer fracture or dislocation) associated to spacer use, and the patients were all able to maintain the sitting position with active knee movements between the 2 surgical stages. Improvement with respect to preoperative functional status was observed in all cases, as evidenced by the Harris Hip Score (HHS) (from 24.2 to 73; p < 0.001) and 12-Item Short-Form Health Survey (SF-12) (from 16.8 to 33.2; p = 0.001), with a lessened need for walking aids. Discussion: The described technique offers a possible solution to a number of complications observed with the use of spacers in massive defects, affording greater patient comfort and autonomy while waiting to receive total femoral replacement.

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