I didn't know that. I feel somewhat vindicated :-) I'll cite the ADA guidelines next time they insist.

edit: link to the latest ADA recommendation on x-rays. https://www.ada.org/about/press-releases/new-recommendations...

> You wouldn’t get an X-ray of another part of your body unless the doctor believed there was reason to order one after an examination. Similarly, dental X-rays should be ordered only after first examining the patient’s medical and dental histories, prior X-ray images, and current clinical exam findings.