MDR - Comprehensive Primary/Micro Stem & Versa-Dial Ti Humeral Head

Inclusion Criteria: * Study devices must have been implanted following the surgical technique and IFU for the Comprehensive Micro Stem and/or the Comprehensive Anatomic Versa-Dial Humeral Heads * Patient must be 18 years of age or older. * Patient must have undergone a primary or revision shoulder arthroplasty with the Comprehensive Micro Stem and/or the Comprehensive Anatomic Versa-Dial Humeral Heads for a cleared indication. Cleared indications include the following: * non-inflammatory degenerative joint disease including osteoarthritis and avascular necrosis, * rheumatoid arthritis, * revision where other devices or treatments have failed, * correction of functional deformity, * fractures of the proximal humerus where other methods of treatment are deemed inadequate, * difficult clinical management problems including cuff arthroplasty where other treatment methods may not be suitable or may be inadequate. Exclusion Criteria: * Absolute contraindications include infection, sepsis, and osteomyelitis. * Relative contraindications include: * Uncooperative patient or patient with neurologic disorders who is incapable or unwilling to follow directions * Osteoporosis * Metabolic disorders which may impair bone formation * Osteomalacia * Distant foci of infections which may spread to the implant site * Rapid joint destruction, marked bone loss or bone resorption apparent on roentgenogram * Patient is a prisoner. * Patient is a current alcohol or drug a…