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.
But batteries consistently improve year on year, we just keep increasing the demand of our devices in lockstep because 10% more powerful! markets much better than 10% more battery life.