关键词: 弯根牙, 弯根阻生, 牙根形态发育, 早期正畸综合治疗

Abstract:

Tooth dilaceration is considered as a dental deformity characterized by pronounced angulations of the longitudinal tooth axis. This article reviewed the etiology， mechanism， clinical features， treatment principles， treatment timing and treatments based on biological and biomechanical thoughts of tooth dilaceration. This article especially illustrated early orthodontic intervention for impacted and dilacerated maxillary central incisors. The early orthodontic intervention showed that the successful tooth alignment could be achieved， the forms of dilacerated root were improved， and the chance of root exposure in oral cavity when angular teeth were aligned was reduced. The author suggested the early orthodontic intervention of impacted teeth with dilacerated root was better for root morphologic development and could be a clinical choice for the tooth dilaceration treatment.

Key words: root dilaceration, tooth impaction, root morphological development, early orthodontic intervention