ahahahahah...... I had a hunch

Any tooth that has been restored has bacteria in it. Virgin teeth have no reason to have bacteria inside of them. It is once the bacteria becomes infectious that there is no reversing the infection.

Also, root canaled teeth harbor various strains of bacteria due to the fact that the blood supply is cut off during the procedure which renders the tooth non vital. Any body part that is deprived of blood will become necrotic and develop infection.

Am I explaining everything ok?

Bryanna