A case of an adenomatoid odontogenic tumor at the second mandibular molar region.

Yatsushiro, Satoko; Mimura, Tamotsu; Marutani, Kazuhiro; Nishihara, Kazuhide; Negishi, Michiko; Kitano, Motoo

doi:10.5794/jjoms.39.1261

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“…The question thus arises as to why some AOT relates to the permanent molar which has no deciduous predecessor, although it consists of less than 4% of pericoronal lesions (see Refs. [2] and [30] for an additional list of references) [1,27,29,[31][32][33][34][35][36][37][38][39]. Suffice it to say that unlike the deciduous tooth, the permanent molar also has a molar gubernacular cord [18,20,22].…”

Section: Introductionmentioning

confidence: 99%

Development and Growth of Adenomatoid Odontogenic Tumor Related to Formation and Eruption of Teeth

Ide

Mishima

Kikuchi

et al. 2011

Head and Neck Pathol

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The number of published cases of adenomatoid odontogenic tumor (AOT) has steadily increased, and about half were reported in Asian populations. Although the clinicopathologic profile of AOT has been extensively reported, factual knowledge of its pathogenesis is rudimentary at best, and there is controversy as to precisely which odontogenic epithelium it arises from. AOT is a successional tooth-associated lesion which develops during the mixed dentition. The permanent successor differs from its deciduous predecessor in that it has an eruptive pathway from the dental follicle to the gingiva, the gubernaculum dentis. With this background in mind, the present review focuses mainly on the early development of AOT. We successfully demonstrated a close spatial relationship between AOT and the gubernaculum dentis in a typical case. From further observations of the same AOT in which an enclosed permanent canine showed enamel hypoplasia, it is possible to pinpoint areas around the crown of a developing successional tooth in continuity with the gubernaculum dentis as starting points. In addition, we discuss the unifying histogenetic concept of three clinical variants, namely, pericoronal (follicular), extracoronal (extrafollicular), (see Article note) and peripheral.

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