L.P.
My son banged his tooth really bad on a coffee table when he was 2..after a few days it started turning grey. We took him to the dentist and he said that the bang killed a nerve and he may lose the tooth but hopefully not for a while because he still needed it. Considering another tooth won't grow till around age 6-8. He actually just lost that grey tooth at 6 years old and the other one hasn't grown in yet and it's been MONTHS. The dentist also said that the longer babies are without teeth they pronounce words wrong because of their tongues going through the hole, etc. I would DEFINITELY take him back to a dentist and talk about these things. Poor little guy. :(