There was a man name Weston Price, about 60 years ago that  inspected root canal teeth for 10 yeard, with a bunch of associates, and he said in 10 years time they never did find 1 root canal that was not infected.

About 80% plus of peoples health problems are in their mouth.  When you are young your immune system is strong and compensates for a lot of dental problems, but as you get older, your immune system is overloaded and you start getting sick, and having pain where you never had it before !!!  Because all your teeth are on certain meridians, and affect different parts of your body.

Check out Hal Huggins book called:  It's All In Your Head.

God Bless You

Bro. Jones