Indications for reverse shoulder prosthesis have expanded to include shoulder arthrosis, rotator cuff arthropathy, elderly complex fractures, and fracture sequelae. Dislocation is a relatively common complication in complex cases. It is critical to carefully evaluate the patient, biomechanical factors and surgical factors and make a decision in the treatment. It is thought that studies on prosthesis design, pre-operative planning, patient-specific guides and intra-operative navigation systems will reduce the risk of this complication.