Inclusion Criteria:  Patient must be 20 years of age or older. Patient must be anatomically and structurally suited to receive shoulder arthroplasty implants.  Patient is a candidate for shoulder arthroplasty due to one or more of the following:  Non-inflammatory degenerative joint disease including osteoarthritis and avascular necrosis. Rheumatoid arthritis. Correction of functional deformity. Fractures of the proximal humerus, where other methods of treatment are deemed inadequate. Difficult clinical management problems, where other methods of treatment may not be suitable or may be inadequate. Patient must be able and willing to complete the protocol required follow-up. Patient must be able and willing to sign the IRB/EC approved informed consent.  Exclusion Criteria:  Patient is unwilling or unable to give consent or to comply with the follow-up program. Patient has any condition which would in the judgement of the Investigator, place the patient at undue risk or interfere with the study. Patient is known to be pregnant or breastfeeding. Patient is a vulnerable subject (prisoner, mentally incompetent or unable to understand what participation to the study entails, a known alcohol or drug abuser, and/or anticipated to be non-compliant). Patient is uncooperative or patient with neurologic disorders who is incapable or unwilling to follow directions. Patient has any sign of infection affecting the shoulder joint or in its proximity which may spread to the implant site. Patient has rapid joint destruction, marked bone loss, or bone resorption apparent on roentgenogram. Patient has any neuromuscular disease compromising the affected limb that would render the procedure unjustifiable. Patient presents with osteoporosis. Patient has osteomalacia. Patient has a metabolic disorder that may impair bone formation. Patient has deficient rotator cuff.