It is a KickStarter program due out in June. It looks to be a mouthpiece type affair that has brushes which hit all sides of all teeth at once, which are rotated and the device injects tooth paste during the short, three-second, procedure. The device sterilizes itself during rest. The promo says it will sell for a starting price of $117.00.

https://9to5toys.com/2017/12/07/unico-smart-toothbrush/

Sounds brilliant and needed to me. If it works as promoted, I'm in.
If I'd had this thing all my life, maybe I wouldn't have the dental bills I have now. May be a great gift for the grandkids.
I'm in the middle of a $5000 implant procedure now for just one tooth.