Dentin dysplasia, type II: report of 2 new families and review of the literature.

Dentin dysplasia, type II, is an inherited autosomal dominant disorder in which primary teeth are amber and translucent, with pulp chambers obliterated by abnormal dentin. The permanent teeth have a normal coronal morphologic character and coloration but exhibit "thistle tube"-shaped pulp chambers as well as numerous pulpal calcifications. The disorder has traditionally been thought to be somewhat rare; however, this article presents 2 new families in which several generations with the disorder were reported to the authors within a 1-year period. It also includes a review of the literature documenting a total of 17 previously reported families.