In some communitys they don't. I went on a tour of a town in Amish country Pennsylvania in 2018 and a little boy who was 3, had a toothache and my tour guide said they were going to take him to the dentist and just yank out the tooth because at least in that amish community they don't believe in it because its considered vain or something. My tour guide said by the age of 7 most kids have had a set of dentures. She said the only thing she would change about the amish if she could would be the dental stuff.