Which of the following teeth has two and a half cusps on its buccal side?()
A. the maxillary first molar
B. the mandibular first molar
C. the maxillary second molar
D. the mandibular second molar
E. the third molar
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Which tooth usually serves as a landmark for locating the mental foramen?()
A. the mandibular central incisor
B. the mandibular lateral incisor
C. the mandibular canine
D. the mandibular premolars
E. the mandibular molars
Which of the following descriptions about the maxillary first premolar is correct?()
A. It is the smallest premolar.
B. Most of the roots are divided into the buccal root and the lingual root at the middle or apical third of the root.
C. There can be three cusps on the occlusal surface.
D. The buccal cusp inclines toward the mesial.
E. None of the above.
The lack of food massage will cause gingival atrophy. This is mainly due to the()
A. zero convexity of the dental crown
B. oversized convexity of the dental crown
C. undersized convexity of the dental crown
D. normal convexity of the dental crown
E. irregular dental crown
Which of the following is not one of the anatomical features of the mandibular central incisor?()
A. It has flat and straight incisal margin.
B. There is almost identical medial incisal angle and distal incisal angle.
C. There is pronounced developmental groove on the labial surface.
D. The incisal ridge is close to the dental long axis.
E. It has flat single root and the elongated depression is deeper on the distal surface than on the medial surface.
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