Grinding your teeth during sleep is kind of a sleep disorder. Also called bruxism, it can happen at any age.
Children sometimes do it as their teeth are changing from their primary to their permanent ones. Some people just get a wear spot, but in more serious cases, you might grind right through the enamel to the pulp.
The best prevention is a hard, plastic mouth guard created by your dentist. It will discourage grinding and protect the surface of your teeth.
https://www.menshealth.com/health/a30930576/grinding-teeth-at-night/
According to Live Science, sensitivity is a defense mechanism we’ve developed to protect damaged teeth from further injury. Teeth have three layers, only one of which — the innermost layer or “pulp” tooth — has blood vessels and nerves.
Every single recorded human culture has some kind of tradition for the disposal of baby teeth. The story of the Tooth Fairy dates back to 13th Century Norse traditions, when it became a tradition for a ‘tooth fee’ to be given to a child when they lost their first baby tooth. Various cultures since that time advise throwing baby teeth into the sun, into fire, between the legs, onto or over the roof of the house; placing it in a mouse hole or burying or hiding it. During the 1950s and in the Disney spirit, Americans conjured up a benevolent fairy who rewards baby teeth with money.
In a recent study investigating the correlations between gum disease and a variety of serious conditions like stroke, hypertension and cardiovascular disease, researchers discovered plaque-identifying toothpaste can potentially lower systemic inflammation. They urge more research on the degree to which plaque-identifying toothpaste can decrease heart attacks or strokes. In the meantime, see areas of teeth with plaque turn green when using this kind of toothpaste.
Scientists from Tufts University developed tiny sensors that attach to your teeth, and monitor your diet and health in real time. 