I have sent it to our doctors for comment, but I can think of no methods where there is any natural "remineralization" that could be accelerated by any artificial means. Once tooth material is gone, it's gone. There is nothing coming from the inside or outside of a tooth that can, as far as I have heard of, rebuild a tooth naturally. No tooth regenerates naturally. They grow from buds underneath and erupt through the gums, building from below, and not once they are outside the gums.
I'll post what the doctors say when they get back to me from my messages.
I had a tooth that needed a new top. I could not do it at the moment and the dentist filled it with a temporary filling. Things being as they were I went to another dentist about 6 years later when the filling fell out. He said that the tooth rematerialized under the filling and he rebuilt the middle and it sits there nicely to this day.
I just heard from our top doctor and he is not aware of anything like this, but he says if there is something like this, it isn't in the current literature. He also says it would have to take several treatments and visits. They'd also have to clean out the carious lesion before treatment, which is not usually a painless procedure, so would require injections of lidocaine.
That means that it cannot be price equivalent to a simple filling which usually takes one visit and 20 minutes max.
He also pointed out that our office uses Ozone therapy to kill the carries which also applies electrical stimulation. We've done that on small carious lesions and they've healed without filling once the bacteria is killed . . . but only if the lesion hasn't penetrated the enamel. If the enamel is penetrated, a filling is necessary other wise other opportunistic bacteria can invade and potentially cause catastrophic loss of the tooth.
He agreed with me that it is a possibility in search of blue-sky funding to develop a product without a viable market. He also said that anyone would be foolish to put off dental treatment waiting for a future miracle treatment that may or may not develop.