My health did not start to improved until I took care of my infections. ( It still has a way to go" I got 6 teeth pulled and removed my metals. We tested the composite materials that were used for fillings before they were used to make sure I wasnt allergic.
There are several good books on dental.
Rooot Canal Cover-Up by George Meining
Rescued By my Dentist By Doug Cook
Accidnetal Cure by Simion Yu.
Simion was the first to found my first tooth infection then Cook removed it and found others.