Hülsmann M
Abteilung Zahnerhaltung, Zentrum fur Zahn-, Mund- und Kieferheilkunde, Universität Göttingen, BRD.
Schweiz Monatsschr Zahnmed. 1995;105(6):765-76.
Dens invaginatus is a rare malformation of teeth, showing a broad spectrum of morphological variations. A genetical determination cannot be excluded. The incidence of dental invaginations cannot be determined exactly, the data from different investigations range from 0.25% to 10%. The majority of epidemiological studies present an incidence of more than 2%. Most affected are maxillary lateral incisors, bilateral occurrence is not uncommon (43%). The aetiology of dens invaginatus is still not entirely known. Most probably the invagination has its origin in a deep folding of the foramen caecum during tooth development which in some cases may even result in a second apical foramen. The invagination presents a predisposition for carious lesions, often resulting in early pulp necrosis and apical periodontitis. Endodontic therapy may present several complications due to complex morphology of the root canal system of teeth with invaginations. The paper reviews the different theories on the aetiology of dens invaginatus, classifications, incidence and clinical aspects of this malformation.
牙内陷是一种罕见的牙齿畸形，表现出广泛的形态学变异。不能排除遗传因素。牙内陷的发生率无法精确确定，不同研究的数据范围为0.25%至10%。大多数流行病学研究显示发生率超过2%。最常受累的是上颌侧切牙，双侧发生并不罕见（43%）。牙内陷的病因仍不完全清楚。很可能这种内陷起源于牙齿发育过程中盲孔的深度折叠，在某些情况下甚至可能导致第二个根尖孔。这种内陷易发生龋损，常导致早期牙髓坏死和根尖周炎。由于有内陷牙齿的根管系统形态复杂，根管治疗可能会出现多种并发症。本文综述了关于牙内陷病因、分类、发生率及这种畸形临床情况的不同理论。
