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.
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.
As for the intercuspal position, which of the following statements is incorrect: ()
A. It is based on the intercuspal occlusion.
B. It is the position of the mandible to the maxilla during intercuspal occlusion.
C. It changes with the intercuspal occlusion.
D. It is also called the muscle position.
E. It is abbreviated as ICP.
Which of the following statements about retruded contact position is incorrect: ()
A. The mandible moves backward and downward for about 1 mm from the intercuspal position.
B. Everyone has it.
C. There is partial contact of the posterior teeth cusp slope.
D. The condyle is located at the rear part of the mandibular fossa.
E. It is the physiological final position of the mandible.
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