Hope she is painfree, if not you could give her Crocin DS/Paracetamol/Calpol for her weight.
Once the swellin/bruising settles one can know true impact the injury has had, luckily it is the milk teeth so unless it is causing her pain in future it should be fine.
Next Steps
Give her soft diet which is easy to chew
Pain control with Crocin suspension