A Trial to Assess the Safety and Effectiveness of an Anatomic Total Shoulder System

Inclusion Criteria: * Adult subject 22 years or older * Clinical indication for total shoulder replacement due to osteoarthritis, and/or post-traumatic arthritis. * Scapula and proximal humerus must have reached skeletal maturity * Willing and able to comply with the protocol * Willing and able to sign the informed consent (or the Legally Authorized Representative will sign for the subject) Exclusion Criteria: * Lack of sufficient bone quality that in the Investigator's medical judgment could compromise implant fixation or bone healing, including conditions such as: * Rapid joint destruction, marked bone loss or bone resorption; * Destruction of the proximal humerus that precludes rigid fixation of the humeral component; and * Osteomalacia * osteoporosis * rheumatoid arthritis * Metal allergies or sensitivity, including a known allergic reaction to implant metals (e.g., nickel) or polyethylene * Patient presents with a malunion or non-union of the tuberosities of the proximal humerus. * Infection at or near the site of implantation, including: * Glenohumeral joint infection * Osteomyelitis * Distant or systemic infection * Medical conditions or balance impairments that could lead to falls * Prior Total, or Reverse Total Shoulder arthroplasty in the affected shoulder. * Prior failed rotator cuff surgery, but excluding successful shoulder arthroscopy * Any full thickness rotator cuff tear at the time of surgery or a nonfunctional rotator cuff * Excessive glenoid bone loss defined by preoperative computed tomography (CT) scans of the shoulder which show insufficient glenoid bone, or insufficient bone identified at the time of surgery * Metabolic disorders which may impair bone function * Nonfunctional deltoid muscle * Neuromuscular compromise condition of the shoulder (e.g., neuropathic joints or brachioplexus injury with a flail shoulder joint) * Patients diagnosed with severe shoulder instability * Patients diagnosed with subscapularis incompetence * Known active metastatic or neoplastic diseases, Paget's disease or Charcot's disease * Currently, or within the last 6 months, or planning to be on chemotherapy or radiation * Currently taking \> 5mg/day corticosteroids (e.g. prednisone) excluding inhalers, within 3 months prior to surgery or patients presenting with symptoms of chronic steroid use. (oral steroids for a chronic condition for 12 months prior to and including the date of surgery) * Female subjects who are pregnant or planning to become pregnant within the study period * In the surgeon's opinion, the subject is unable to understand the study or be compliant with the follow up or have a history of non-compliance with medical advice * History of any cognitive or mental health status that would interfere with study participation * Substance Use Disorder (alcohol and/or drug) * Engages in manual labor or sports activities that could affect shoulder outcome * Patients who have a work-related injury leading to shoulder OA * Currently enrolled in any clinical research study that might interfere with the current study endpoints * Patients with a life expectancy of less than three years * Medical condition or balance impairment that could lead to falls * Weight bearing shoulder due to wheelchair, crutches, rollator at the time of operation * Individuals who are incarcerated or detained in a correctional facility or under any form of legal supervision that limits their ability to voluntarily consent to participate in the trial. * Previous randomization of the subject in the current study.