牙中牙与额外牙的罕见关联。

Rare associations of dens invaginatus and mesiodens.

作者信息

Sannomiya Eduardo Kazuo, Asaumi Jun-ichi, Kishi Kanji, Dalben Gisele da Silva

机构信息

Department of Oral and Maxillofacial Radiology, Orthodontics Post Graduate Program, São Paulo Metodista Dental School, São Paulo, Brazil.

出版信息

Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2007 Aug;104(2):e41-4. doi: 10.1016/j.tripleo.2007.01.005. Epub 2007 May 24.

DOI:10.1016/j.tripleo.2007.01.005

PMID:17524683

Abstract

Dens invaginatus is a developmental variation resulting from an alteration in the normal growth pattern of the dental papilla. Synonyms of this disturbance include dens in dente, invaginated odontome, tooth inclusion, and dentoid in dente. Radiographically, it is observed as infolding of a radiopaque ribbon-like structure, with equal density as enamel, extending from the cingulum into the root canal and sometimes reaching the root apex, assigning the appearance of a small tooth within the coronal pulp cavity. This article presents 2 case reports. The first describes an 8-year-old girl with dens invaginatus in a mesiodens; the second report describes a 16-year-old boy presenting with 2 mesiodens, both associated with dens invaginatus.

摘要

牙中牙是一种发育变异，由牙乳头正常生长模式的改变引起。这种病变的同义词包括牙内陷、内陷性牙瘤、牙包涵体和牙内牙样体。在影像学上，它表现为一条不透射线的带状结构向内折叠，其密度与牙釉质相同，从切缘延伸至根管，有时可达根尖，在冠髓腔内呈现出一颗小牙的外观。本文介绍2例病例报告。第一例描述了一名8岁女孩，其正中牙出现牙中牙；第二例报告描述了一名16岁男孩，有两颗正中牙，均伴有牙中牙。