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Causes. The shoulder joint is the most frequently dislocated joint of the body. Because it moves in several directions, your shoulder can dislocate forward, backward or downward, completely or partially, though most dislocations occur through the front of the shoulder. dislocated shoulder may be caused by: 1  Sports injuries. 2  Shoulder dislocation is a common injury in contact sports, such as football and hockey, and in sports that may involve falls, such as downhill skiing, gymnastics and volleyball. 3  Trauma not related to sports.
Hip Arthritis Overview. Osteoarthritis (OA) is a degenerative joint disease that can affect any joint in your body, including your hips. Over time, due to aging, trauma or other factors, the cartilage that cushions your joints starts to break down.Without cartilage, your joint bones rub together when you move.steoarthritis (OA) is a degenerative joint disease that can affect any joint in your body, including your hips. Over time, due to aging, trauma or other factors, the cartilage that cushions your joints starts to break down. Without cartilage, your joint bones rub together when you move.