Joint Definition

A joint is located at any point where two or more bones come into contact. Various types of joints are structured to allow movement in different planes, as well as to provide mechanical support for the weight of the body.

Joints are the source of pain and discomfort in the many forms of arthritis. Pain most often results from degeneration of the cartilage that surrounds and cushions the joint (as in osteoarthritis), or from inflammation of the synovial fluid that lubricates the joints (as in rheumatoid arthritis).