During articulation, which inclined planes of the mandibular molars does not contact the opposite teeth? ()
A. The buccal inclined planes of the buccal cusp
B. The lingual inclined planes of the buccal cusp
C. The buccal inclined planes of the lingual cusp
D. The lingual inclined planes of the lingual cusp
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As for the mandibular postural position, which one is correct? ()
A. It is the process when the mandible slides from the centric relation position to centric occlusal position.
B. It has nothing to do with the presence of the teeth.
C. It is also called tooth position.
D. It sits at the posterior-inferior of CR.
As for the rest position, which one is correct? ()
A. It is also called the mandibular postural position.
B. It is not a stable position.
C. It is at open bite state.
D. It is the position when a person sits in an upright posture, with the head held up, and the muscles overcoming the gravity of the mandible.
E. All the above are correct.
In normal overjet, the distance between the incisal edge of the maxillary incisors and the labial surfaces of the mandibular incisors is ()
A. Over 7 mm
B. 5-7 mm
C. 3-5 mm
D. Less than 3 mm
In normal overbite, the incisal edge of the mandibular incisor is () of the lingual surface of the maxillary incisor.
A. within the incisal third
B. within the middle third
C. at the cervical third
D. beyond the cervical third
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