Computer-assisted correction of cam-type femoroacetabular impingement: A sawbones study

Background: Assessing the adequacy of bone resection when correcting cam-type femoroacetabular impingement can be difficult when the surgeon is inexperienced or when less-invasive arthroscopic surgical techniques are used. The primary purpose of the present study was to compare, using a Sawbones model, the results of computer-assisted navigated osteochondroplasty of the femoral neck junction with correction with use of femoral head spherometer gauges. The second objective was to compare the results of computer-assisted osteochondroplasty performed by surgeons who had varied experience with the procedure. Methods: We calculated and compared the post-resection alpha angle in custom-molded Sawbones models with camtype impingement following both surgical techniques, performed by three surgeons with varied experience with the procedure. The alpha angle was measured at two positions (the three o'clock and one-thirty positions of the femoral headneck junction) before and after resection. Results: At the three o'clock position, there were no significant differences between the computer-navigation and spherometer groups (p = 0.83