Your dentists fucked up in the cleaning process. It is the most important part of the job. Trapping bacteria in there can cause all kinds of health problems. Life threatening problems.

Chlorhexidine is the new cleaner, versus bleach (old school)

The dentist has to be careful not to drill into the jaw bone too.

Really if you need a root canal it is much safer to get the fucker pulled (and cheaper)

Lay off the meds and tey the cocunut oil, micronutrients such as beyond tangy tangerine, Vitamin D & C. Eat organic raw veggies.

You will be fine.

Oh and lots of water

Some swear by piss therapy (yeah going ancient Egyptian and drinking your own piss. I wont go that far.