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)