The malformed central cusp is often found in_______. ()
A. maxillary first premolar
B. maxillary second premolar
C. mandibular first premolar
D. mandibular second premolars
E. the first molar
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The "six-year molars" refer to_______. ()
A. the incisors
B. the canines
C. the premolars
D. the first molars
E. none of the above
Which of the following teeth have the cross-shaped developmental grooves? ()
A. Maxillary first molar.
B. Mandibular first molar.
C. Maxillary second molar.
D. Mandibular second molar.
E. Mandibular second premolar.
Which of the following teeth show two and a half cusps from the buccal aspect? ()
A. Maxillary first molar.
B. Mandibular first molar.
C. Maxillary second molar.
D. Mandibular second molar.
E. Third molars.
The atrophy of the gingiva from the direct impaction of the food is caused by ().
A. the irregular shape of the crown
B. the normal crest of curvature of the crown
C. the under-contouring curvature of the crown
D. the over- contouring curvature of the crown
E. none of the above
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