DePuy Global Unite Shoulder System

Inclusion Criteria: * Patient greater than 18 years of age and skeletally mature * Patient qualifies for primary or revision total or reverse shoulder arthroplasty based on diagnosis of investigator of osteoarthritis, rheumatoid arthritis, post-traumatic arthritis, un-united humeral head fractures, irreducible 3- and 4- part proximal humeral fracture, avascular necrosis, or gross rotator cuff deficiency. * Patient is willing and able to provide written informed consent and to complete scheduled follow up visits/evaluations/questionnaires Exclusion Criteria: * Patient has one of the following compromise the affected limb; a significant injury to the upper brachial plexus, paralysis of the axillary nerve, or a neuromuscular disease compromising the affected limb * Patient has a known or suspected infection * Patient is known to be pregnant * Patient has a sensitivity or allergic reaction to one or more of the implanted materials * Patient is unwilling or unable to provide consent or comply with follow up visits