It is unacceptable practice, not listening to your patients. Not only do you not listen but to then undermine what they are telling you. If you were treating adults you would loose every client. No adult would continue to be treated by a dentist who didn't listen to their complaints of pain and continued to pull their teeth out, but because you are treating children you can call them liars and say that you know their bodies and feelings better than they do. It's unethical, disrespectful, sadistic and flat out unacceptable.