An innovative gel that forms a layer over teeth and then recruits calcium and phosphate ions from saliva to build new enamel has the potential to change dental treatment. To date, we don't have any way to regenerate the tough outer layer of enamel on our teeth as it erodes with age.
There’s another treatment on the horizon though that grows entirely new teeth. There’s an article with a pic of a ferret showing an entirely new tooth that was grown. I think it’s a research group in Japan that managed it?
These techs together mean some pretty exciting things coming in a decade or two for shitty teeth when the technologies mature.