Which of the following descriptions about the relationships of the mesial occlusion is correct?()
A. The mesial buccal cusp of the maxillary first molar is distal to the buccal groove of the mandibular first molar.
B. The mesial buccal cusp of the maxillary first molar is opposite to the buccal groove of the mandibular first molar.
C. The mesial buccal cusp of the maxillary first molar is mesial to the buccal groove of the mandibular first molar.
D. There is mandibular retrognathia.
E. There is normal mandibular facial type.
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Before the age of 4, the features of the deciduous occlusion don’t include()
A. The teeth are closely aligned
B. zero space
C. straight dental crown
D. indistinct occlusal curvature
E. temporary cross bite
Which of the followings does not belong to the one body and four processes of the maxilla?()
A. the zygomatic process
B. the temporal process
C. the frontal process
D. the alveolar process
E. the palatine process
The nerves that leaves the middle and posterior part of the infraorbital canal include the anterior superior alveolar nerve and()
A. the maxillary nerve
B. the middle superior alveolar nerve
C. the posterior superior alveolar nerve
D. the infraorbital nerve
E. none of the above
The floor of the maxillary sinus extends posteriorly from the maxillary second premolar to the root apex of ()
A. the maxillary first premolar
B. the maxillary canine
C. the maxillary first molar
D. the maxillary second molar
E. the maxillary third molar
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