A client of mine loaned me a book 15 years ago about a dentist who spent many years teaching other dentists about the benefits of and how to do root canals. He later came across this research and wrote a book about it and why you should not get root canals. It’s hard to get good confirmation about what’s real and what’s not these days. But I’ve decided to err on the side of caution and not get root canals when that was an option.
http://ewao.com/2017/08/14/shocking-connection-97-of-all-terminal-cancer-patients-previously-had-this-dental-procedure/