>>33266780The bacteria feeds on sugars in your mouth. They poop out acid which eats away at your teeth. They also need an acidic environment to survive, so their poop helps them live and poop more. It's like a slow burning fire in your mouth eating away at your teeth. Brushing your teeth lowers the PH of your teeth from 4.5 to 4, which is outside the comfort zone for bacteria, and remineralizes the tooth so it's more resistant to attack.
Cavities are slowly developing in your mouth. A surface-level cavity can be remineralized no problem. If it penetrates the surface, you need a filling. If it penetrates deep towards the root, they'll saw away your tooth to a stump and give you a crown. If it reaches the nerve, then you feel intense pain and you need a root canal. They literally drill out your nerve so you'll never feel anything from that tooth again, a horrifying procedure you want to avoid at all costs.
You probably have several advancing cavities right now you're unaware of. The sooner you can get them filled the better.
