Exactech Shoulder Post Market Clinical Follow-up Study

Inclusion Criteria: * Patient is indicated for shoulder arthroplasty (or has previously undergone shoulder arthroplasty) * Patient is skeletelly mature * Patient is expected to survive at least 2 years beyond surgery * Patient is willing to participate by complying with pre- and postoperative visit requirements * Patient is willing and able to read and sign a study informed consent form Exclusion Criteria: * Osteomyelitis of the proximal humerus or scapula; if a systemic infection or a secondary remote infection is suspected or confirmed, implantation should be delayed until infection is resolved * Inadequate or malformed bone that precludes adequate support or fixation of the prosthesis * Medial humeral bone loss resulting in compromised humeral stem fixation * Proximal humeral bone loss extending distal to the surgical neck where there is compromised humeral stem fixation * Neuromuscular disorders that do not allow control of the joint * Significant injury to the brachial plexus * Non-functional deltoid muscles * Patient's age, weight, or activity level would cause the surgeon to expect early failure of the system * The patient is unwilling or unable to comply with the post-operative care instructions * Alcohol, drug, or other subtance abuse * Any disease state that could adversaly affect the function or longevity of the implant * Patient is pregnant * Patient is a prisoner * Patient is contraindicated for the surgery * Revision cases in which a stemmed humeral component was used (Stemless Shoulder System) * Metal allergy or sensitivity to the implants materials (Stemless Shoulder System) * Acute fracture of the proximal humerus and displacement of the tuberosities, displaced three or four part fractures of the proximal humerus (hemi-arthroplasty), or acture fracture of the proximal humerus with failure of the glenohumeral joint (total anatomic shoulder arthroplasty) (Stemless Shoulder System) * Acute fracture of the proximal humerus in combination with degenerative diseases of the glenohumeral joint and a grossly deficient, irreparable rotator cuff resulting in superior migration of the humeral head (reverse total shoulder arthroplasty) (Stemless Shoulder System)