What are the differences between ra and oa?

Numerous: RA affects the joint lining or inner joint capsule. RA is an autoimmune disease that commonly had a hereditary component. The synovial proliferation that occurs causes damage to the cartilage. Typically symmetrical affects right and left and multiple joints affected. OA is a wear and tear of the cartilage in a joint. The cartilage thins and more stress seen on bone causing pain