The tooth with the root that is approximately twice as long as the crown and an oval-triangle section of the root neck is ()
A. the maxillary central incisor
B. the mandibular central incisor
C. the maxillary canine
D. the mandibular canine
E. the maxillary first premolar
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Which statement about lobe is correct?()
A. It is the calcification center for tooth development.
B. All teeth are developed from the same lobe.
C. All teeth are developed from two lobes.
D. The shallow groove between the two lobes is called the accessory groove.
E. None of the above is correct.
The depressions of the crown does NOT include()
A. accessory grooves
B. ridges
C. fissures
D. pits
E. developmental grooves
The teeth that often show abnormal central cusp are()
A. the maxillary first premolars
B. the maxillary second premolars
C. the mandibular first premolars
D. the mandibular second premolars
E. the first molars
Observed from the outside, all of the following parts are components of the tooth except()
A. the crown
B. the root
C. the neck
D. the apical foramen
E. None of the above is correct.
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