Structural, Ultrastructural, Microradiographic, and Electron-probe Studies of an Unusual Case of Regional Odontodysplasia

Abstract

Structural, ultrastructural, microradiographic, and electron microprobe studies of an unusual case of odontodysplasia were performed. Two cusps were absent from one molar. Normal prismatic enamel and mantle dentin were present on the two others. The dentinal mass resembled osteodentin. The mineral content of enamel and dentin was decreased compared to that of the controls.

Regional odontodysplasia: a bibliography

“…Radiopaque areas have occasionally been noted within such radiolucencies (11,28). Rarefaction of bone and thinned trabeculae have been noted (6,34,38,82,88) although we have not personally observed this and others have eommented that the bone was nortnal (15,61,62,67).…”

“…Some authors have suggested that their cases show affeeted primary teeth without correspondingly involved permanent successors. Hindsight and a careful review of published radiographs suggests that the permanent teeth were (38). HrrcittN (34) described "unerupted deciduous (?)…”

“…Initiation of hard tissue formation and subsequent development of the affected crown and root is delayed when compared with unaffected antimeres (10,27,29,34,38,61,65). The delay in tooth formation probably aeeounts for the primordial cyst-like appearance described by ALEXANDER et al (3).…”

Regional odontodysplasia: report of four cases

“…Histology reports on structural, ultrastructural, microradiographic and electron probe microanalysis of the cases of odontodysplasia indicated a lack of enamel on some cusps and hypoplastic enamel on others. However, the abnormal prismatic structure and mineral content of the enamel was only slightly different when compared to normal enamel [9,10,21].…”