I came across this model on Phisick, a wonderful medical antique site.

Isn’t it wonderful? Rather like H.R. Giger designed a dental device.

A well fashioned French antique dental model by Vecabé. The full set of teeth are made from enamel and would have been painstakingly crafted and fired individually. Each one is secured to the mandible with brass pin and can be removed. They fit together perfectly to form an anatomically correct bite. The heavy metal block opens through 180 degrees to allow detailed inspection.

Source (with more photos)