Rotator Cuff Sparing Total Arthroplasty

Inclusion Criteria: * Patient is indicated for shoulder joint replacement * Patient is at least 21 years of age * Patient is expected to survive at least 2 years beyond surgery * Patient is willing to participate by complying with pre-and post-operative visit requirements * Patient is willing and able to review and sign a study informed consent form Exclusion Criteria: * Prior arthroplasty in the affected shoulder. * Significant deformity of the proximal humerus that requires a custom made implant or where osteotomy of the shaft and / or the tuberosity has to be considered. * Significant medial erosion of the glenoid such that lateral edge of the humeral head lies medial to the lateral rim of the acromion. * Significant injury to the brachial plexus * Inability or unwillingness to participate in the post operative evaluation for the entire 24 months period. * Pregnant and lactating women will be excluded