what is osteoarthritis
Osteoarthritis. Sometimes called degenerative joint disease or âwear and tearâ arthritis, osteoarthritis (OA) is the most common chronic condition of the joints.It occurs when the cartilage or cushion between joints breaks down leading to pain, stiffness and swelling. pain.steoarthritis. Sometimes called degenerative joint disease or âwear and tearâ arthritis, osteoarthritis (OA) is the most common chronic condition of the joints.