Comparison Between Exactech Guided Personalized Surgery (GPS) and Conventional Instrumentation of Shoulder Arthroplasty

Inclusion Criteria:

• Patient is at least 21 years of age at the time of surgery

• Patient is indicated for reverse shoulder arthroplasty

• Patient is willing to participate by complying with pre- and postoperative visitrequirements

• Patient is willing to participate for the entire length of the prescribed follow-up (minimum 2 years)

• Patient is willing and able to review and sign a study informed consent form

• Preop CT scan is within 3 months of the date of surgery

Exclusion Criteria:

• Revision shoulder arthroplasty

• Reverse shoulder arthroplasty for fracture

• Need for structural glenoid bone graft

• Osteomyelitis of the proximal humerus or scapula; if a systemic infection or asecondary remote infection is suspected or confirmed, implantation should be delayeduntil infection is resolved

• Inadequate or malformed bone that precludes adequate support or fixation of theprosthesis

• Neuromuscular disorders that do not allow control of the joint

• Significant injury to the brachial plexus

• Non-functional deltoid muscles

• The patient is unwilling or unable to comply with the post-operative careinstructions

• Patients who are a known drug or alcohol abuser, or have a psychological disorder (e.g. schizophrenia major depression, bipolar disorder, etc.) as defined by the DSM4that affect follow-up care or treatment outcomes.

• Alcohol, drug, or other subtance abuse

• Any disease state that could adversaly affect the function or longevity of theimplant

• Patient is pregnant

• Patient is a prisoner

• Patient who are currently involved in any personal injury litigation, medical-legalor worker's compensation claims