Oral Health and Dental Issues Support Group
You only have one set of teeth for life, so take good care of them. This is the place to discuss oral and dental care, good practices, dental office experiences, and general thoughts around those pearly whites.
Ask him what specifically is he afraid of?
Assure him that nobody is going to do anything to inflict pain. the most painful part was over when he hit the table. Say it with a smile & a hug.