My 5 year old DS fell face first on a tiled floor 6 months ago with his upper mouth taking most of the impact! As well as busting his lip his upper gums were badly bruised for a few weeks but his teeth amazingly remained secure and intact. He was checked over by a dentist and we were warned that if the nerves had been damaged the teeth may discolour, and indeed, in the following weeks the front upper two turned almost black. They have since faded to a pale grey but look increasingly unlikely to return to normal and I am concerned as to any damage/discolouration caused to his second teeth waiting to come through. I know its just a case of waiting to see what happens but wondered if anyone had any similar experiences of this????