I have found that dental clinics in the US can be some of the shadiest health related businesses you have to deal with.

There are few independent clinics around. Most of them belong to huge corporate conglomerates that push down shady treatments like this, or offer predatory financing for these “treatments”.

I’ve had only two instances of a health professional outright lying to me and telling me I had a health condition that I didn’t have, and both times were dentists. One of those times was also about periodontal disease, so it seems like this is a common thing.

A good heuristic is that if the treatment isn’t covered at all by insurance it very well might be worthless.