Sharpe and other researchers around the world have been studying if and how teeth stem cells could be used to regenerate a whole tooth, possibly one day replacing dentures or implants. But teeth are complex organs, with both hard and soft tissue, so that goal remains further away.
Can your teeth repair themselves?
Enamel can repair itself by using minerals from saliva, and fluoride from toothpaste or other sources. But if the tooth decay process continues, more minerals are lost. Over time, the enamel is weakened and destroyed, forming a cavity. A cavity is permanent damage that a dentist has to repair with a filling.
Can your teeth regenerate?
Problem is, it's not living tissue, so it can't be naturally regenerated. Unfortunately, you can't regrow it artificially, either -- not even with those special toothpastes. But chin up: Some dental products can help with the tooth-enamel issue; just not in the way you might think.