Funnily enough, I have indeed have had part of a tooth (an impacted wisdom tooth) come off when eationg something, and was kind of grossed out that my food coul

Funnily enough, I have indeed have had part of a tooth (an impacted wisdom tooth) come off when eationg something, and was kind of grossed out that my food could contain this small white hard stone-like thing... until later that day I realized I was missing a part of a tooth. Actually, it's happened twice, as about 15 years after that I had a bad cavity and fracture in a forward molar, and a few days before a scheduled root canal it happened again, but this time I suspected what had happened as soon as I encountered something hard all of a sudden while chewing something that shouldn't really have bits as hard as that in it. Which is to say, their response that perhaps it was your own tooth may not have been as out of left field as you might have thought. It's probably a somewhat common occurrence.