i would suggest u take her to the dentist as soon as u can too..
my son fell over on a concrete table 4 months ago and actually left his teeth marks in it that how hard it was and i took him to the medical centre but they said his fine... long story short... my son now has two dead front teeth that we r trying to figure out with the dentist but i should of done its straight away

also did u get an accident report from the creche??
poor lil thing it must look alot worse then it feels but id say she isnt really thinking bout it hopefully it stays that way..
Gl hun