Back in USSR times in the 80s my high school had a room for a dental work. Of course it had a soviet electric motor drill, not any fancy or not so fancy compressed air turbo anything (because it's cheap like some great RBMK reactors which of course cannot fail) and a young visiting dentist to test their skills on kids. I do not have any great memories related to this. But now I'm also thankful that at least there were no resources to have an X-ray machine for some practice.