This might be a good idea—when they get out they will be better able to reintegrate into society. Would also help with self-esteem, which would also help them when they get out.
I also have sympathy for people who can’t afford dentistry. Prisoners aside, there are millions of decent folks who can’t afford to visit a dentist regularly and it can be disfiguring.
Boo freakin’ hoo. I don’t remember my grandfather ever having teeth. It wasn’t noticeable. He said dentures hurt. He ate regular food just fine. He was a mayor and a newspaper owner/editor so interacted with the public 24/7.