osteoarthritis or arthritis

age anatomy arthritic arthritis biological body bone capsule cartilage degeneration degenerative disease erosion femur fibula health healthcare healthy human hypertrophy illustration inflammation joint joints knee leg medical medicine obesity orthopedic osteoarthritis osteophyte osteoporosis outgrowths pain painful patella rheumatism rheumatoid science skeletal skeleton stiffness surgery swelling symptoms synovial tibia treatment worn