Mupparapu Muralidhar, Singer Steven R, Pisano Dominic
Department of Diagnostic Science Sciences, UMDNJ-New Jersey Dental School, Newark.
N Y State Dent J. 2006 Aug-Sep;72(5):42-6.
Dens invaginatus, commonly known as dens in dente, is a developmental malformation of teeth that most commonly affects permanent maxillary lateral incisors. Deciduous teeth are infrequently affected. Presence of dens invaginatus in mandibular permanent teeth is extremely uncommon. A rare presentation of coronal double dens invaginatus incidentally detected in a mandibular canine tooth on radiographic examination is being reported, along with a discussion of this anomaly. The patient had presented for routine dental treatment unrelated to this finding. In addition, the various radiographic appearances of dens invaginatus, as they present within the maxillary and mandibular teeth, are described. Essential clinical considerations and treatment options are presented. A review of the pertinent literature is undertaken, and tables summarizing previously published reports of mandibular dens invaginatus and double dens invaginatus are presented. A review of the literature indicates that dens invaginatus in mandibular teeth is extremely rare, with only 11 other cases, involving 14 teeth, reported previously. Cases of double dens invaginatus are even more atypical, with only eight previously reported cases. Dens invaginatus is an anomaly that should be familiar to all practicing dentists because of the clinical implications and potential sequelae.
牙中牙，通常称为牙内陷，是一种牙齿发育畸形，最常累及上颌恒侧切牙。乳牙很少受影响。下颌恒牙出现牙内陷极为罕见。本文报告了一例在影像学检查中偶然发现的下颌尖牙冠状双牙内陷罕见病例，并对该异常情况进行了讨论。患者因与此发现无关的常规牙科治疗前来就诊。此外，还描述了牙内陷在上颌和下颌牙齿中的各种影像学表现。介绍了重要的临床注意事项和治疗选择。对相关文献进行了综述，并列出了总结先前发表的下颌牙内陷和双牙内陷报告的表格。文献综述表明，下颌牙齿的牙内陷极为罕见，此前仅报告过11例其他病例，涉及14颗牙齿。双牙内陷病例更为少见，此前仅报告过8例。由于其临床意义和潜在后果，牙内陷是所有执业牙医都应熟悉的一种异常情况。
