1.The model consists of three incisions of the lumbar vertebrae.
2.The uppermost lumbar vertebra shows the normal lumbar spine and its bone structure. 
3.The middle lumbar vertebra shows mild osteoporosis and the lumbar spine has some deformation. 
4.The lower lumbar vertebra shows severe osteoporosis. 
5.The lumbar vertebrae are obviously deformed and flat. 
6.The model can be taken apart for careful study.