Dentistry, and specifically the branches of dentistry that deal with dental prostheses is full of little gadgets and knick knacks that seem to have a very large overlapping areas, the same thing is done with a slightly different name and gets to be treated (and priced) like a whole different prosthesis altogether. A great example of this is the partial denture versus bridge debate. At what point is a partial denture a bridge? Why is a bridge so much more expensive than a partial denture?