If there was a world where children's teeth were valuable and wicked antagonists didn't want to wait to collect them as they fell out naturally, but instead extracted all the teeth by force what would happen?
1) Assuming late 17th century technology and no magic to aid the "operation," would they even be possible to extract without killing a seven or eight year-old child?
2) Following the violation, would the permanent teeth grow in eventually?
It's disturbing, I know.
It's a dark and fallen world, but I may need to come up with some magical conceit that softens the realistic impacts and a narrative conceit that means even the most villainous would employ such magic of necessity to retain the value of the teeth. Even if entirely painless, it would still be a horribly cruel act as the child would be missing many of their teeth for years.