题目内容

The attrition is ()

A. non-physiological
B. the physiological phenomenon of the natural wearing of the hard tissue of the teeth
C. caused by tooth brushing
D. All of the above
E. None of the above.

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ICP is lost when the mandibular teeth are all gone.

When the natural dentition is in the protrusive articulation, any posterior teeth contact is considered as the occlusal interference.

The buccal inclined planes of the buccal cusps of the maxillary molars have no occlusal contact in occlusion.

The intercuspal occlusion is the position where the maxillary and mandibular teeth are in extensive contact.