A.T.
My daughter had three permanent teeth that came in before and behind her baby teeth. They had to pull the baby teeth to allow the permanent teeth to move forward...not your situation I know. But she had to get one of her baby teeth pulled before they saw the permanent one come in because her dentist said on the X-ray it showed the permanent tooth and he figured the same thing would happen to that tooth also.
Once they pulled the tooth it took almost 2 years before the permanent one came in.
Someone(not a dentist) told me I would probably have to go in to the dentist and have her gum sliced so the permanent would come through.
I guess the gum can thicken and the tooth can't break through. But like I said, it took almost two years.