I had root canals two of them removed because I read Weston Price's book The root canal Cover up.
Anyhow I did not feel any different from having them removed and the bio dentist saw some sort of oily black type of stuff . But later I leaned that everyone has some strains of bacteria or amoeba or whatever, underneath the root canal.
I read root canal is a low level infection dripping it strains of who knows what into the body , making the body sick one of the strains is deadly, but it is rare.
My regular dentist always tell me there is nothing wrong with root canals and is ticked for having mine removed I was super sick for years and I did everything possible to find the cause and address it