It’s relatively new (for consumers I mean) from what I see, but it’s the same technology some dentists use for teeth cleaning. Works pretty well, but like I said, it doesn’t go under the gums (the thing stops vibrating when it contacts the gums, for safety), so you need an actual dentist or dentist kit to do that, which is why dentists probably don’t want to recommend it; they don’t want people to think that this is all you need and get issues. They are right, but if you are smart, it’s a good thing to use to supplement teeth care between visits and saves you money, because you don’t have to go to the dentist as often (granted, you still need to brush your teeth, I don’t want anyone reading this thinking you don’t have to lol).

Edit: If anyone is going to use this, use a tissue to wipe the tartare on it as you clean each tooth and for the love of hygiene, clean the metal tips with soap after you’re done with your cleaning session!!!