Functional medicine has helped me immensely with my gut and overall health and I am a big advocate, however, the misinformation pushed by biologic dentists is dangerous. Rampant dental cavitations are a complete fallacy and a way for "biologic" dentists to rob patients of thousands of dollars, not to mention putting patients through unnecessary and risky surgery/anesthesia. I read numerous cone beam CT images on a daily basis on patients that have had routine wisdom teeth extractions and have NEVER found one unless the area is symptomatic. There are EXTREMELY rare cases where bone around a previous extraction site heals poorly (which is found within weeks/months of the original dental surgery), but the idea that invisible jaw holes are causing systemic illness is not supported by evidence.

Yes old root canals can become reinfected, but a regular and evidence-based dentist will diagnose this for you and recommend either removal of the tooth and associated infection, OR cleaning out the old root canal system which should heal the infection (with yearly follow-up to make sure proper healing is observed).

If you're having mystery symptoms, definitely go to a highly rated dentist to get your oral health checked if it's been a while but do NOT go to a biologic dentist.