The influence of traumatic intrusion of primary teeth on their permanent successors in monkeys A macroscopic, polarized light and scanning electron microscopic study

Publisher Website
Google Scholar
Abstract
Primary maxillary and mandibular central incisors were experimentally intruded on 13 monkeys, to examine enamel changes in permanent successors. To study the removal effects of the displaced tooth, the left primary incisor was extracted 1h after trauma, and the tooth on the right was left in the jaw. Six wk later the animals were sacrificed. Macroscopically, circumscribed areas of opacities on labial enamel were noted. SEM [scanning electron microscope] examination showed that non-affected parts of enamel had reached anatomical form, whereas imbibition studies and microradiographs demonstrated that the maturation process was far from complete. Arrest of enamel maturation corresponded to the extent of the surface opacity. Using SEM small areas displaying rupture of the surface enamel were seen. No differences were observed either macroscopically or histologically in relation to immediate removal or preservation of the intruded primary incisor.