The visible dental tissue on the longitudinal section of the crown does not include ()
A. The enamel
B. The dentin
C. The cementum
D. The pulp
E. None of the above
查看答案
Which tooth can have five cusps on the occlusal surface?()
A. The maxillary first molar
B. The maxillary second molar
C. The maxillary third molar
D. The mandibular first molar
E. None of the above
The root system doesn't include ()
A. The root canal
B. The intercanal anastomoses
C. The lateral canal
D. The apical ramification
E. The pulp cavity
Which is connected to the periodontium via the lateral accessory foramina? ()
A. The root canal
B. The accessory root canal
C. The lateral canal
D. The intercanal anastomoses
E. The apical ramification
The deciduous maxillary central incisor is single-rooted, and the ratio of its root length to its crown length is ().
A. 1:1
B. 1:2
C. 1:3
D. 2:1
E. 3:1
微信支付 
支付宝支付