If the maxillary and mandibular incisors are in crossbite, then the contacting surfaces, during maximum intercuspation, would be?

a. mandibular lingual and maxillary facial.
b. mandibular facial and maxillary facial.
c. mandibular lingual and maxillary lingual.
d. mandibular facial and maxillary lingual.

A. mandibular lingual and maxillary facial.

Explanation:

In dentistry, the intercuspation can be defined as the occlusal position of the mandible. In this the cusps of teeth of both arches actually interpose with the cusps of the teeth belonging to the opposing arch. This position of teeth is called as centric occlusion.  

According to given position of teeth the maxillary and mandibular incisors are in crossbite state thus the intercuspation will occur maximum at the mandibular facial and mandibular lingual.

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