TSA Versus RSA in Patients >75

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.