Reminds me of the story of this dentist in Sweden who was fired for raising concerns about how 80% of migrant children he was treating were actually adults, based on their teeth:
https://www.dental-tribune.com/news/dental-hygienist-fired-f...
https://www.dental-tribune.com/news/dental-hygienist-fired-f...
Nothing magically happens to teeth when someone turns 18.
Wisdom teeth develop during teen years and may erupt as early as 16, as late as 25, or not at all.
> may erupt as early as 16, as late as 25
Cool so assuming the average age to be 20.5 this means someone with wisdom teeth is more likely to be of age than not.
Put this fact together with other factors like wrist x-ray estimation and obviously looking like an adult and maybe we can have some common sense