Computer-Assisted Minimally Invasive Curettage and Reinforcement of Femoral Head Osteonecrosis with a Novel, Expandable Blade Tool
For minimally invasive curettage of femoral head osteonecrosis, we have developed a novel expandable blade tool which can be introduced into the femoral head through the subtrochanteric route under navigation guidance. In this study, we evaluated the effectiveness and feasibility of this tool in comparison with the Cebotome, a conventional bone cutter. A target area in the femoral head of a Sawbone femur model was curetted with each tool through the subtrochanteric route under navigation guidance. The volume of the curetted necrotic lesion was significantly larger and the procedure time was significantly shorter with this tool than with the Cebotome. The compressive strength of the femoral head curetted with this tool and filled with hydroxyapatite blocks was comparable to that of the intact one. This expandable blade tool can be a suggestion for more effective and feasible curettage of necrotic lesions in femoral head osteonecrosis than conventional bone cutters.
KeywordsCompressive Strength Femoral Head Necrotic Lesion Surgical Tool Core Decompression
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