Validation of the femoral component placement during hip resurfacing: a comparison between the conventional jig, patient‐specific template, and CT‐based navigation

BACKGROUND: Appropriate insertion of a femoral guidewire is essential for hip resurfacing. A simulation study was planned using synthetic femoral bone models and the accuracy and precision of femoral guidewire alignment and insertion point were compared between conventional jigs, patient-specific templates, and computed tomography (CT) based navigation techniques. METHODS: Anteversion, stem-shaft angle, and the three-dimensional insertion point were measured postoperative with CT. Errors between planned and postoperative measurement and precision were evaluated. RESULTS: There were no statistically significant differences in error for anteversion or insertion point, although the mechanical jig showed greater error in the stem-shaft angle than the others. Patient-specific template and CT-based navigation showed good precision with high intraclass correlation (ICC) (template, 0.908 to 1.000; navigation, 0.929 to 0.995) and small root mean square error (RMSE) (0.954 to 2.969; 1.468 to 3.213). The mechanical jig group performance was inferior to the others. CONCLUSIONS: Patient-specific templates and CT-based navigation had good accuracy and precision. The mechanical jig technique was inferior to the others.