Really, I don't see a huge application for dentistry. This doesn't actually grow new teeth. The device promotes minor proliferation of dentinoblasts. So this is in no way going to replace implants; you have to have a tooth to start with.
It would be interesting to know how much growth is possible. Maybe this could stop internal resorption, possibly repair root fractures or induce secondary dentin growth over mechanical pulp exposures. If you got a LOT of growth this could be used in conjunction with or possible in place of crown lengthening.
But those are fairly limited applications and with the time required for the treatment I can't see this being a cost effective modality. Definitely interesting though.