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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, which means porous bone, is a disease in which the bones gradually become weak and brittle. The condition often results in broken bones, or fractures, especially of the hip, wrist, and spine, even from simple activities like lifting a chair or bending over.steoporosis is sometimes considered a silent disease because bone loss occurs without symptoms. In fact, many people do not know they have the disease until they break a bone. Osteoporosis can also cause a vertebra (one of the 33 bony segments that form the spine) to collapse.