I'm surprised that health insurance companies haven't started offering "good brusher" discounts the way car insurance companies offer a "good driver" discount when you use their car data logging device/app.
/rant
[1] https://www.vox.com/23901293/dentist-delta-dental-insurance-...
But it's fine; we call it insurance anyway, and everyone knows what it means, so there's no problem.
“When you look at the dental insurance model, it doesn’t protect the patient from financial risk. It’s the opposite,” said Marko Vujicic, chief economist and vice president of the Health Policy Institute at the American Dental Association. “Once the benefit runs out, the $1,400 or whatever it is, all of that financial burden is on the patient. So it protects the insurer, they’re limited on their exposure.”
In other words, there is no real benefit to offering a "good brusher" discounts.