• Maik Hoberg, Christian Konrads, Simon Huber, Stephan Reppenhagen, Matthias Walcher, André Steinert, Thomas Barthel, and Maximilian Rudert.
• Department of Orthopaedic Surgery, Koenig-Ludwig-Haus, University of Wuerzburg, Brettreichstr. 11, 97074, Würzburg, Germany. m-hoberg.klh@uni-wuerzburg.de.
• Arch Orthop Trauma Surg. 2015 Oct 1; 135 (10): 1469-74.

PurposeRevision hip arthroplasty using a modular head-neck adapter gives the possibility of keeping a well-fixed femoral component while revising the acetabular prosthesis or femoral head and adapt leg length and femoral offset to the individual anatomy intraoperatively. The success of this kind of surgery is still unclear due to the lack of medium- to long-term follow-up. Therefore, we analyzed the clinical and radiological outcome of the modular Merete BioBall© adapter system in revision hip surgery.MethodsIn this retrospective study, we included 95 consecutive patients with a Merete BioBall© adapter system implanted during revision hip arthroplasty. The average follow-up was 52.5 months. For clinical evaluation, we used the Harris Hip Score. The health-related quality of life was determined with the visual analog pain scale.ResultsThe surgeries were performed 97 months after prior hip arthroplasty on average. The main indications for the Merete BioBall© adapter system were dislocation, acetabular loosening, and wear. In the clinical outcome, patients achieved 80.9 points in the Harris Hip Score. The mean level of persisting pain was 1.4 (VAS). The overall survival of the Merete BioBall© system in revision hip arthroplasty revealed 92.8 % survival at 8.17 years follow-up with a repeat revision rate of 5.2 %.ConclusionsPerforming revision hip arthroplasty using the Merete BioBall© adapter system revealed good clinical outcome.

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