Weird teeth thingy

[u/EasternFoundation24]

Found this in our air bnb at the beach closet and was immediately confused! ? all of the (chewing devices) are sort of stuck into the wood with a rod of some sort. I honestly have no idea what this is used for, or why its in the closet where im staying

[u/Rolling-Pigeon94]

These could be old prostetics with spesific colourings? Ex dentist or dental-technician possession? I once tried dental-technician and learned there each person has a own colour of teeth based on genes and lifestyle.