Anatomical Hand Osteoarthritis Model with Display Stand & Education Card. This full-size right hand osteoarthritis (OA) model shows the effects of osteoarthritis through cutaway views and painted detailing. The effects of OA shown include swan neck deformity of the thumb, osteophytes or bone spurs as well as Heberden's and Bouchard's nodes. The model shows the ligaments, tendons, cartilage and muscle which is also affected by osteoarthritis. This osteoarthritis (OA) hand allows for demonstration of normal anatomy alongside a comparison of affected areas.