Another big issue is root canal - where the dentist actually removes the tooth pulp (the living, soft tissue in the middle of the tooth which contains the nerve and blood cells which feed the tooth - keeping it alive). Then they stuff the hole with a chemical concoction and finally cap the tooth with a metal crown. Underneath that cap, all mayhem may be breaking loose in terms of bacterial growth and infection, but we don't know anything about it because we feel no pain (the nerve was removed and the tooth is dead!). Research on the internet... the dangers of root canal, and be shocked out of complacency!
My research led me to find a biological dentist, who recently removed my 20+ year-old root-canal-treated tooth. Black gunk came out from underneath the crown and it took almost a month for the area to heal, after taking various remedies and a detox. The dentist explained that because this infection was seeping into my system for years, it could have caused cancer anywhere on the left meridian - where ironically I had to have a cyst surgically removed a few years ago! I still have a swollen lymph gland on the left side, which I'm monitoring.
If you're interested in your health, strange as it may sound, perhaps your symptoms could be traced back to your teeth.