How come doomed to failure teeth merely capture worse?

The body is designed to heal itself if you allow it to do so/help it out a bit (i.e.: a broken bone will try to mend & calcify even if it's not "set" correctly; or, an infected cut contained by the skin will heal up if you treat the infection and don't irritate the cut; etc.)
How come teeth don't work resembling this? I have never hear of anyone who suffered from an infected tooth (a cavity, basically) that got better in need dental treatment.How come doomed to failure teeth merely capture worse?
I think God requirements us remeber this phrase.. "Eat to liv, dont live to eat."
they do they drop out
because your teeth arent really like a module of your body, there are no bones nerves or anything.
The acids from our foods irritate the protective layer of the tooth. You can have a tooth recalcify if the cavity is not too big.
If we didn't enjoy doctors to take fastidiousness of our sicknesses we would be dying at the age of 30-35 and the teeth last long ample for that without dentists. But since we live to 80, we hold to make the teeth finishing that long or get dentures.
Bone can mend because it is completely internal to the body. Inside the body, the bone can be supplied near blood through a pervasive circulatory system, and is a living tissue.
A tooth on the other hand is not internal to the body-- Part of it is exposed to the outside world, and the constituent that is exposed is not living tissue (the enamel, which have no living cells surrounded by it). There is no way for a circulatory system to manage the enamel to repair it because it is outside the body.
Hope this clears things.