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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.
Osteoporosis is a disease characterized by thinning and deterioration of bone tissue with loss of calcification and density. Osteoporosis can progress over time.This can cause the bone to become fragile, increasingly porous (as the name of the disease would suggest), and to break more easily. fracture of the hip, spine or wrist is more likely to occur, but other bones are also susceptible to breaks. Osteoporosis can be present for years without any noticeable symptoms, but signs can include: 1  Severe back pain. 2  Loss of height over time.