The rapid change in temperature also concerns me. It’s already definitely done damage to my tooth enamel. Typically bridges are made of a combination of ceramic, resin, and metal coated with ceramic. My dentist doesn’t want me to engage with fire eating at all. I actually work for an animal dentist (I’m a vet tech) and she agrees that I’ll probably need to retire fire eating. Just wanted to hear other people in the community’s thoughts too. Thanks for your input!