Validation of patient specific surgical guides in total hip arthroplasty.

Background: The validation of patient-specific surgical guides (PSGs) by their design and the comparison of planned and actual PSG setting in total hip arthroplasty (THA) have not previously been reported.

Methods: The errors between preoperative planning and computed tomography (CT)-based PSG setting (E1), and between preoperative planning and implantation (E2) were evaluated using CT in 16 fresh cadaveric hips.

Results: E2 was significantly smaller with the wide-base-contact resurfacing-THA PSG than with the narrow-base-contact type (P<0.

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.