Yep, I'd see a dentist too. The deciduous (baby) teeth actually do an important job holding the space for the permanent teeth, although at 4.5 she might be losing those top front ones soon anyway. If the permanent teeth are close to erupting it is possible that they have been damaged by the force on the deciduous teeth when your DD fell. Hopefully, no harm done (apart from some pain for the poor bubba!!) but I would still get a dentist to take a look.