Fracture occurs when bone breaks. It may crack, snap or shatter. After a fracture, new bone cells fill the gap and repair the break. A stronger plaster cast is applied to keep the bone in correct position until it heals. Joint dislocation is a displacement of bone from a joint, with tearing of ligaments, tendons and articular capsules. Usually caused by blow or fall. Subluxation is partial dislocation. Joint dislocation is most common for shoulder joint. Flamingo Arm Sling Strap(with Shoulder Cushion) gives you a great relief.