The following are a few signs due to which an orthopedic doctor may recommend reverse shoulder arthroplasty or shoulder replacement surgery- Severely damaged shoulder joint because of which you cannot move your hand or lose the ability of movement in your shoulder. Sports injury that may dislocate or crush shoulder bone. Stiffness and excruciating pain in the shoulder joint because of severe arthritis. Accidental or awkward fall due to which the rotator cuff has been torn critically.