rTSA restores forward elevation primarily via compensatory scapulothoracic motion and deltoid-driven neuromuscular strategies rather than normalization of glenohumeral mechanics. Standardized, longitudinal studies integrating high-fidelity kinematics, EMG, and real-world activity monitoring, with explicit reporting of implant construct parameters, are needed to clarify how surgical technique and implant design influence postoperative biomechanics and functional recovery.
Thomson et al. (Sun,) studied this question.