4-stage osteoarthritis(OA) shoulder

Set of four shoulder models , reduced size , illustrating degenerative joint disease (osteoarthritis) of glenohumeral joint : erosion to joint articular cartilage , progression of degenerative disease , osteophyte(bone spur) formation at the articular surface , and humeral head flattening.

Normal stage includes a full scapula. Advanced stage shows acromioclavicular joint osteoarthritis.