Dental insurance is a tricky thing. It’s rare that a healthy person needs top-price procedures, like delayed wisdom teeth removals and root canals. (And just one of those procedures might cost about the same price as a year’s worth of dental insurance premiums.) But if more than one disaster comes up, you could be looking at enormous bills without insurance. If you’re fortunate enough to never need such a procedure, but you pay for dental insurance year after year, you could throw thousands of dollars away. I can’t tell you whether or not health insurance will pay off for you, but I can tell you how to limit your chances of needing to answer that question, which has a lot to do with what you eat. Here are 20 foods that are making your dentist visits expensive.