http://pixvid.me/mdbonedocsShoulderAr... The shoulder can perform movements in more directions and to greater extents than any other joint in our body. But because it can perform so many movements, the shoulder is vulnerable to stress and injury. Shoulder injuries are very common, especially among people who play sports that require overhead arm motions.
Strong tissues hold the shoulder bones together. The tissues are more likely than the bones to be affected by stress, injury, and "wear and tear." They may stretch or rupture, causing the shoulder to become weak, unstable, or dislocate. Some shoulder conditions require surgery. Arthroscopy allows surgeons to see, diagnose, and treat problems inside the shoulder joint.
Before arthroscopic surgery existed, surgeons made large incisions that affected the surrounding joint structures and tissues. They had to open the shoulder joint to see it and perform surgery. An arthroscopy requires small incisions and is guided by a small viewing instrument. Arthroscopy is less invasive than traditional surgical methods. It has a decreased risk of infection and a shorter recovery period.