Fluoridated since 1973 (NYSCOF)

Teeth can become infected, and decay can spread deep into the tooth where bacteria strike the root. This type of infection often can be treated with antibiotics in the ER. A dental professional then has to perform a root canal or tooth extraction.
A serious complication is Ludwig’s angina, an infection that gets into the soft tissues of the throat and under the jaw, It can be life-threatening because the swelling progresses so rapidly that the airway can seal shut.

Scary article.