Sawbone models or anatomical models are used as teaching aids or to experiment with various surgical/orthopaedic procedures:

For over two decades, ***Sawbones, the originators of "hands-on" workshop models***, continues to be the leader in medical models for orthopedic and medical education. Sawbone models have been specifically developed for use in motor skills exercises where a realistic artificial anatomical model is required for the "hands-on" teaching of surgical procedures. … Orthopaedic sawbone models are ideal for a number of uses, including surgical practice and teaching, patient demonstration, and product promotion…. These products offer uniform physical properties similar to real bone. They are well suited for testing implants and instrumentation.
Sawbones are designed to be cut, drilled, tapped, or gouged with standard orthopaedic instruments - hand or powered. Each Sawbone can be used over again for a number of different exercises. The ability to mold and mass-produce specific pathologies makes them ideal for large-scale surgical skills courses. In addition, minimal clean up is required, in contrast to embalmed or fresh specimens. Sawbones are designed to be cut, drilled, tapped, or gouged with standard orthopaedic instruments - hand or powered. Each Sawbone can be used over again for a number of different exercises. The ability to mold and mass-produce specific pathologies makes them ideal for large-scale surgical skills courses. In addition, minimal clean up is required, in contrast to embalmed or fresh specimens. http://www.sawbones.com/
We have over 2,000 different orthopaedic products. Choose from a variety of different model types and bone materials for a custom product that's ideal for your specific needs. https://secure.sawbones.com/products/ortho/