I’ve been hearing whispers of this research for a few years now. If this really works, dentistry will be advanced in an almost unbelievable way.
Nothing of this nature is instantaneous. Can you imaging wearing a device on your tooth that contains a battery, wires, electronics, that stimulates the growth of what is essentially a bone, for what will require the length of time a broken bone takes to heal, usually about six weeks? Assume they can cut that down by 33% and they can do it in four weeks. Do you get to EAT during the treatment, or does food in the cavity impede the healing, or is there a special cleaning required to remove food residue? Frankly, I would be very surprised if anything comes from this.
Preventing the carries in the first place is FAR better than filling the lesion in the tooth after the fact. In other words: "Look MA! No cavities!"