Yesterday dd16 and I each had a dental check up appointment. I am at the same practice but with a different dentist and said to her that as she is now 16 she may as well start going in on her own. This would be quite convenient for future appointments because the practice is not too far from dd's college and she could attend before or after her college day.
She happily went in herself but within seconds the dental nurse came to the waiting room and called me in. I wondered what the issue was and was told by the dentist that dd could not come in on her own and I (or dh) would need to accompany her until she is 18.
I didn't realise 16-18 year olds could not attend a dental appointment on their own.