Which of the following cusps is the closest to the floor of the maxillary sinus ()
A. Maxillary first molar
B. Maxillary second molar
C. Maxillary third molar
D. Maxillary second premolar
E. From maxillary second premolar to maxillary third molar
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The important landmark of the posterior superior alveolar nerve block anesthesia is ()
A. maxillary tubercle
B. alveolar foramen
C. zygomatic alveolar ridge
D. canine fossa
E. mental spine
Which of the following is the nearest to the mandibular tube ()
A. The apex of the mandibular first molar
B. The apex of the mandibular second molars
C. The apex of the mandibular third molars
D. The apex of mandibular first, second and third molars
E. None of the above is correct
Which of the following descriptions about the main function of lateral pterygoid muscle is incorrect ()
A. mouth-opening action
B. protruding the mandible
C. lateral movement of the mandible
D. elevate the mandible
E. lower the mandible
Which of the following muscles elevates and protrudes the mandible () the masseter muscle
A. the temporal muscle
B. the mandibular hyoid muscle
C. the lateral pterygoid muscle
D. the genihyoid muscle
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