Early clinical outcomes following navigation-assisted baseplate fixation in reverse total shoulder arthroplasty: a matched cohort study
Abstract
BACKGROUND
Accurate placement of the glenoid baseplate is an important technical goal of reverse total shoulder arthroplasty (RSA). The use of computer navigated instrumentation has been shown to improve the accuracy and precision of intraoperative execution of preoperative planning. The purpose of this study was to compare early clinical outcomes of patients undergoing navigated reverse total shoulder arthroplasty versus a non-navigated matched cohort.
METHODS
A retrospective review of a prospectively-collected shoulder arthroplasty database was used to identify 113 patients from a single institution who underwent navigated primary RSA with a minimum 2-year follow-up. A matched cohort of 113 non-navigated RSA was created based on gender, age, follow-up, and preoperative diagnosis. Preoperative and postoperative range of motion, functional outcome scores, and complications were reported.
RESULTS
226 shoulders with mean age of 71 years were evaluated after navigated (113) or non-navigated (113) RSA. Mean follow-up was 32.8 months (range 21-54 months). At final postoperative follow-up the navigated group had better active forward elevation (135o vs 129o, p=0.023), active external rotation (39o vs 32o, p=0.003), and Constant scores (71.1 vs 65.5, p=0.003). However, when comparing improvements from the preoperative state, there were no statistically significant difference in range of motion or functional outcome scores between groups. Complications occurred in 1.8% (2) of…
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