Inclusion Criteria:  All patients (75 years of age) at the time of surgery Patient is willing to participate by complying with pre and postoperative visit requirements Patient is willing to consent for enrollment Patient has advanced imaging (CT or MRI) that demonstrates an intact rotator cuff  Exclusion Criteria:  Patients under the age of 75 Need for any structural graft for repair of the shoulder during surgery Current infection of the proximal humerus or scapula Proximal humerus fracture Inadequate or malformed bone that precludes adequate support for prosthesis (B2, B3, C Glenoid morphology) Neuromuscular disorder that does not allow control of the shoulder joint Significant injury to the brachial plexus Diagnosis of inflammatory arthropathy Preoperative diagnosis of full thickness rotator cuff tear >Goutallier Stage 1 rotator cuff atrophy Prior shoulder arthroplasty Non-functioning deltoid muscle Patients who are known drug or alcohol abuser, or have a psychological disorder as defined by the DSM4 that could affect follow-up care Patient is a prisoner Patients who are currently involved in any personal injury litigation, or worker's compensation claims.