The function of masticatory movement can be divided into three stages: ()
A. Protruding, retruding and lateral movements.
B. Cutting, crushing, and grinding movements.
C. Front and back, opening and closing, and lateral movements.
D. Mouth opening, food locating, and chewing movements.
E. Centric occlusion, small open bite occlusion, and return to centric occlusion.
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Attrition is ()
A. non-physiological
B. a physiological phenomenon of natural consumption of hard dental tissue
C. caused by tooth brushing
D. All of the above.
E. None of the above.
Abrasion often occurs in ()
A. the labial surface and the occlusal surface
B. the incisal edge and the occlusal surface
C. the incisal edge and the cervix
D. The incisal ridge, the occlusal surface and the proximal surface
E. None of the above.
The power of chewing comes from ()
A. tooth
B. mandibular movement
C. masticatory muscle
D. TMJ
E. None of the above
The relationship between the retruded contact position and the intercuspal position is mainly horizontal, and the mandibular postural position and the intercuspal position is mainly vertical.
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