Which artery is not involved in the abundant blood supply of maxilla? ()
A. The posterior superior alveolar artery
B. The inferior alveolar artery
C. The infraorbital artery
D. The descending palatine artery
E. The sphenopalatine artery
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As for the enamel, the correct choice is ()
A. The enamel is highly-calcificated and is the hardest tissue in the tooth tissues
B. The enamel is yellow-colored
C. The enamel covers the crown
D. The enamel covers the root
E. None of the above is true
Among the dental tissues, the hard tissue that covers the root is ()
A. Cementum
B. Dentin
C. Enamel
D. Pulp
E. None of the above is true.
Which of the following description of the mandibular first premolar is incorrect? ()
A. They are the smallest premolars.
B. The difference of the buccal cusp and the lingual cusp height is the largest.
C. There are transverse ridges on the occlusal surface.
D. The buccal cusp is offset toward the distal.
E. There is a crescent-shaped bucco-cervical ridge.
Which of the following description of the maxillary canine is incorrect? ()
A. The labial axial ridge is on the labial surface.
B. The lingual axial ridge is on the lingual surface.
C. The cusp tip is offset toward the distal.
D. The cusp tip is offset toward the mesial.
E. The cross section of tooth root is rounded triangle
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