Sling vs No Sling After Reverse Total Shoulder Arthroplasty

Inclusion Criteria: * Patient is scheduled to undergo a primary reverse shoulder arthroplasty procedure * Patient voluntarily consents to participate in the study and has the mental and physical ability to participate in the study, fill out subjective questionnaires, return for follow-up visits, and comply with prescribed post-operative physical therapy * Patient meets indications for primary reverse shoulder arthroplasty for the following diagnosis * Rotator cuff arthropathy * Glenohumeral arthritis * Patient is between 18-100 years old * Patient is English speaking Exclusion Criteria: * A history of ipsilateral shoulder arthroplasty * A history of shoulder septic arthritis * A history of a proximal humeral fracture * Chronic locked dislocation * Rheumatoid arthritis * Tumors * Axillary nerve damage * Non-functioning deltoid muscle * Glenoid vault deficiency precluding baseplate fixation * Infection and neuropathic joints * Known or suspected non-compliance, drug or alcohol abuse * Patients incapable of judgement or under tutelage * Inability to follow the procedures of the study, e.g. due to language problems, psychological disorders, dementia, contraindication for imaging etc. * The subject is related to investigator as family members, employees, or other dependent persons