My son (12) finds it so difficult to open his mouth for the dentist to check his teeth or to let her put any instruments in his mouth. She is worried about his teeth now and wants to give them a clean with her machinery. She has suggested sedating him or giving some kind of anaesthetic on next visit but I am worried about this for lots of reasons. She is a very kind caring dentist but he still finds it distressing. Does anyone have experience of this? Thanks.