Anatomical Shoulder™ Inverse/Reverse Study

Inclusion Criteria: * Age - 18 years minimum. * Sex - male and female. * General Health - the patient should be able to undergo surgery and participate in a follow-up program based upon physical examination and medical history. * Informed Consent - patient or patient's legal representative has signed a Patient Informed Consent form. * Indications - Diagnosis of disease or trauma in the affected joint, including cuff-tear arthropathy, failure of prior rotator cuff surgery and irreparable rotator cuff tears associated with loss of glenohumeral stability with the indication for total shoulder arthroplasty. * The deltoid muscle has to be intact in all 3 parts (clavicular, acromial as well as spinal). Exclusion Criteria: * Patient is skeletally immature. * Patient is pregnant. * Patient is unwilling or unable to cooperate in a follow-up program. * Patient shows one of the following medical conditions - Chronic fracture, Acute fracture, Axillary nerve lesion, Severe loss of humeral or glenoid bone, Paralysis of the deltoid muscle, Active Infection * Patient requires one of the following medical interventions - Implant Revision, Glenoid bone grafting, Autografts