Worst case scenario is that the underlying developing adult tooth
was damaged. This IME is kinda rare since GOD built children to
survive these little traumas.

See the Pedodontist or a GP asap for x-ray and evaluation.

Try your best to not be a worrying parent.

Best wishes,

--

W_B

Take out the G'RBAGE
wubbabubbazG@RBAGEyahoo.com

kefir_novice@yahoo.com

You do not have to worry about the permanent tooth.
However, I you should have taken her to the dentist ASAP not the
emergency room.
They are not qualified to make tx recommendation with regard to teeth.
Second in the emergency room they have a oral maxillofacial surgeon on
staff 24/7 who is a dentist first and has dental training. This person
should have been called if not a pedodontic resident on staff
depending on the hours.
When a tooth gets knocked out etc... time is of the essence usually
for permanent teeth this is 30min not 2-3 days. I realize your neice
does not have her permanent teeth and that things may be different but
generally this is the thing for parents to do. We can not expect the
public to know the difference between permanent dentition and
decidious so to keep things simple, in the future see the dentist
first, demand to see oral surgeon in the least to check things out if
you are already in a hospital.