Gound T G
University of Nebraska, College of Dentistry, Lincoln 68588, USA.
Pract Periodontics Aesthet Dent. 1997 Jun-Jul;9(5):585-94; quiz 596.
Dens invaginatus is the most common dental anomaly in a group of dental anomalies, related by their embryologic development and by the fact that their defects provide a potential pathway for bacteria to cause pulpal pathology. It occurs when the inner enamel epithelium invaginates into the dental papilla prior to calcification. It exists in erupted teeth as an enamel-lined tract, which either ends in a blind sac inside the crown or root or exits into the periodontal ligament. The lining may be incomplete in areas and may not protect the pulp. Methods of providing preventive treatment for teeth with dens invaginatus are described. When pulpal pathosis occurs, the dens may displace the pulp and complicate access cavity preparation and subsequent endodontic treatment, adversely affecting the prognosis. The learning objective of this article is to present treatment planning considerations and suggestions.
牙内陷是一组牙发育异常中最常见的一种，这些发育异常因其胚胎发育过程以及其缺陷为细菌导致牙髓病变提供了潜在途径而相互关联。它发生于牙釉质内层上皮在钙化前向内陷入牙乳头时。在已萌出的牙齿中，它表现为一条内衬釉质的管道，该管道要么在冠部或根部内终止于一个盲囊，要么通向牙周膜。内衬在某些区域可能不完整，无法保护牙髓。文中描述了针对牙内陷牙齿的预防性治疗方法。当发生牙髓病变时，牙内陷可能会使牙髓移位，使开髓腔预备及后续根管治疗复杂化，对预后产生不利影响。本文的学习目标是提出治疗计划的考量因素及建议。
