Glenoid Guide Pin Accuracy in Shoulder Arthroplasty

This research article compares the accuracy of glenoid guide pin insertion during shoulder arthroplasty using two navigation methods: computer navigation (C-NAV) and mixed reality navigation (MR-NAV). Accurate guide pin placement is crucial in both total and reverse shoulder arthroplasty to minimize complications such as impingement and component loosening. The study involved twenty CT scans from patients with glenohumeral arthritis or rotator cuff tear arthropathy. Each method was evaluated under the supervision of a senior surgeon, with C-NAV utilizing an optical tracking system and MR-NAV employing a head-mounted display for holographic guidance. The primary outcomes measured included absolute errors in guide pin inclination, version, and entry point relative to the preoperative plan. Results indicated no statistically significant differences in accuracy between the two methods. Both C-NAV and MR-NAV demonstrated high accuracy, with MR-NAV offering advantages in cost and usability in the operating room.