题目内容

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.

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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.

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The power of chewing comes from ()

A. tooth
B. mandibular movement
C. masticatory muscle
D. TMJ
E. None of the above

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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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Which of the following descriptions about the normal signs of the intercuspal occlusion is incorrect: ()

A. Each tooth is in contact with two teeth on the opposite jaw
B. Canine relationship is normal.
C. The first molar relationship is neutral.
D. The overbite and overjet relationships of anterior and posterior teeth are normal.
E. The midlines of the upper and lower dentition are aligned with the frenulum of the upper lip.

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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 ()

The power of chewing comes from ()

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.

Which of the following descriptions about the normal signs of the intercuspal occlusion is incorrect: ()

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.