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.
Got a photo one time when we were dating… was hoping for tits. Nope tooth root and all. It fell out when she cleaned the years of solidified shit off it.
Granted she was in public health in a poor poor poor community but still. Gross.