Breaking a tooth at a restaurant.
3 months ago I broke my tooth at a restaurant and filed a complaint form then. I had just had my tooth worked on in oct or dec, so I see no reason for it to break. I was eating a hamburger and hit a piece of bone, I didn't realize what it was at first and I swallowed it. Then I realized my tooth had broke, as the tooth was so sharp it cut my tongue. The insurance company for this restaurant is trying to tell me they aren't responsible, there is no proof I broke it at their rest and it's the meat manufacturers responsibility. What recourse do I have?