Arthritis Foundation | Symptoms Treatments | Prevention Tips ...All about Osteoarthritis. Osteoarthritis (OA), also called osteoarthroses or degenerative joint disease, is the most common type of arthritis. OA is a chronic ...Arthritis Foundation - Wikipedia, the free encyclopediaThe Arthritis Foundation is the largest national nonprofit organization solely dedicated to the prevention, control and cure of arthritis, the leading cause of ...Arthritis FoundationFind arthritis resources including links to various arthritis organizations at Arthritis.com.