关键词: 牙齿发育, 牙根发育不良疾病, 牛牙症

Abstract: Taurodontism with large pulp chambers in which the bifurcation or trifurcation is displaced apically and hence that the chamber has greater apico-occlusal height than in normal teeth and lacks the constriction at the level of cemento-enamel junction (CEJ). The distance from the trifurcation or bifurcation of the root to the CEJ is longer than the occluso-cervical distance. One case of taurodontism in deciduous molar was reported and relevant literatures were reviewed. The possible etiology, diagnostic classification and treatment of taurodontism were discussed.

Key words: Tooth development, Hypoplasia of tooth root, Taurodontism