Retrovertion Assesment and Study in Elderly Patients With Reverse Total Shoulder Arthroplasty

Inclusion Criteria: * men and women over 60 with the diagnosis rotator cuff massive break (Hamada 2 or more), arthrosis secondary to ruptures of the rotator cuff and primary osteoarthritis with lesion of the cuff, with full Walch B2 type or in patients older than 80 years. Inclusion criteria * Good functionality of the deltoid muscle. * Presence of minor round (Hornblower test - no muscle atrophy in nuclear magnetic resonance) * Accept informed consent Exclusion Criteria: * \- Review of hemiarthroplasty or anatomical proesis of the affected shoulder. * Fracture of shoulder in the upper extremity to intervene. * Central neurological diseases * Advanced cognitive impairment * Brachial plexus injuries * Local or systemic infection. * Oncological disease * Treatment with immunosuppressants.