As for the abnormal chewing cycle, which of the following is incorrect? ()
A. There is no obvious momentary stop of mandibular movement during occlusal contacts.
B. The shape during the chewing cycle is unstable.
C. The speed of the chewing cycle changes greatly.
D. The distinction of the discharging and resting phases of the masticatory muscle EMG is significant.
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Masticatory force refers to ()
A. the actual force of the masticatory muscles
B. the maximal force that the elevator muscle can contract
C. the maximum bite force that a group of teeth can exert
D. the maximum force that the periodontal ligament can withstand
E. None of the above.
In the permanent teeth, the teeth with the largest biting force and the smallest biting force are usually ()
A. The second molar is the largest, and the lateral incisor is the smallest.
B. The second molar is the largest, and the central incisor is the smallest.
C. The canine is the largest, and the lateral incisor is the smallest.
D. The first molar is the largest, and the lateral incisor is the smallest.
E. None of the above
The power source of masticatory movement is ()
A. teeth
B. mandibular movements
C. muscles
D. TMJ
E. None of the above
The most beneficial biological lever for the masticatory system is ()
A. class Ⅰ
B. class Ⅱ
C. class Ⅲ
D. All of the above
E. None of the above
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