Sidus Stem-Free Shoulder IDE Study

The primary objectives of this study are to evaluate the safety and efficacy (defined as follows) of the Sidus Stem-Free Shoulder System in unilateral primary total shoulder arthroplasty. Safety: Will be evaluated by monitoring the frequency and incidence of device related adverse events or unanticipated adverse device effects (UADEs) in investigational subjects as well as analyzing survivorship using revision or intended revision as an endpoint. Efficacy: Will be determined by comparing the overall pain and functional performance, survivorship and radiographic success of investigational subjects with those subjects who received the control devices.