Nalawade Triveni M, Pateel Deepak, Mallikarjuna Rachappa, Gunjal Shilpa
Department of Pediatric and Preventive Dentistry, Manubhai Patel Dental College and Hospital, ORI, Vadodara, Gujarat, India.
BMJ Case Rep. 2013 Jul 26;2013:bcr2013200211. doi: 10.1136/bcr-2013-200211.
Dens invaginatus is a developmental anomaly resulting in a deepening or invagination of the enamel organ into the dental papilla prior to calcification of the dental tissues. The prevalence has been reported to vary from 0.04% to 10%. Dens invaginatus commonly affects lateral incisors and very rarely affects the mesiodens. This article presents a rare case of type II dens invaginatus affecting an impacted mesiodens in a 13-year-old boy and describes its gross and histological features. The associated tooth was dilated and showed invaginated enamel and dentin extending beyond the cement enamel junction. In this case, the clinical diagnosis was confirmed by histological evaluation of the internal morphology using a hard tissue microtome to section the tooth.
牙内陷是一种发育异常，导致在牙组织钙化之前，成釉器向牙乳头内深陷或内陷。据报道，其患病率在0.04%至10%之间。牙内陷通常影响侧切牙，很少影响正中牙。本文介绍了一例罕见的II型牙内陷病例，该病例发生在一名13岁男孩的一颗埋伏正中牙上，并描述了其大体和组织学特征。相关牙齿呈扩张状，可见釉质和牙本质内陷延伸至牙骨质釉质界之外。在本病例中，通过使用硬组织切片机对牙齿进行切片，对内部形态进行组织学评估，证实了临床诊断。
