This investigation was undertaken to compare the mesio-distal crown dimensions of the permanent teeth in subjects with and without fluorosis. For this study, 25 pairs of study models cast immediately from alginate impressions of children from each of the two groups were evaluated. Their mean ages were 13.9 +/- 1.6 and 13.9 +/- 1.4 years, respectively. A dental vernier calliper was used to recor...

The literature on radiolucent lesions in unerupted permanent teeth is reviewed with particular attention to etiology. A case is presented which demonstrates severe coronal destruction of a mandibular second permanent molar. Histological evidence also is presented to confirm diagnosis of external resorption. Based on previous literature and the results of this case, the authors conclude that the...

Intracoronal radiolucencies in unerupted permanent teeth had been described previously as caries, carieslike lesions," and developmental in origin.More recent reports describe these lesions as resorption of the crown of unerupted permanent teeth' found as an incidental radiographic finding, rarely in more than one tooth in the same patient.-' These often go unnoticed until eruption and then are...