...although I'm not sure what you'd say.
I work part time in a reception class, as a SED one to one. I previously did lunch duty, so know all the kids quite well. There are a few with bad teeth, but the little girl in question makes my heart ache. They were rotten at the beginning of the year, but now, they've all but disintegrated. Another child, with well brushed pearly whites, was telling me how he had a wobbly tooth, and she piped up "my tooth fell out when I ate an apple yesterday" and pointed at her upper front tooth, which whilst still there, was one brown 2mm nub beyond the gum line. What she was saying was that part of her tooth broke off. How she's not in intense pain I don't know....
But school can't say anything. There was a dentist that came to see the whole class earlier in the year, but it was an opt in thing, so I don't know if she got seen. Schools aren't allowed to tell you your child has headlice, so telling them their teeth need serious care is also off the table. I've never seen a mouth like hers...child or adult, and she's five years old.
Why can't schools say when there are issues? Could it be upgraded to a safeguarding issue?