what does OA mean
Osteoarthritis (OA), which is also known as osteoarthrosis or degenerative joint disease (DJD), is a progressive disorder of the joints caused by gradual loss of cartilage and resulting in the development of bony spurs and cysts at the margins of the joints.steoarthritis is caused by disintegration of the cartilage that covers the ends of the bones. As the cartilage wears away, the roughened surface of the bone is exposed, and pain and stiffness result. In severe cases the center of the bone wears away and a bony ridge is left around the edges.