Thank you, someone has now come forward and stated a price that they get their teeth cleaned for, which is 600 Baht. My dentist charges for the same clean just over 3,000 Baht for a 10 minute procedure.
My wife's aunt currently on a holiday from living in Sweden, but using a different dentist to me, had to have her teeth cleaned and it took 3 appointments and they charged her 10,000 Baht. No joke. Hence why I say they're crooks. Cleaning teeth is money for old rope.