Tooth decay is normally removed by drilling, followed by filling in the cavity with an amalgam or composite resin, but a new treatment, called Electrically Accelerated and Enhanced Remineralisation (EAER), accelerates the natural movement of calcium and phosphate into the damaged tooth:
A two-step process first prepares the damaged area of enamel, then uses a tiny electric current to push minerals into the repair site. It could be available within three years.
Faster, please.
And once Larry Niven’s autodocs are routinely regrowing our teeth, I expect some Charles Sheffield Shifter tanks to give us fangs for Halloween.