54. Otic ganglion is innervated by which nerve ?

a.) vagus b.) occulomotor
c.) facial d.) Glossopharyngeal

ANS> d


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33.Specific gravity of enamel is:

a. 1.9. c. 2.5.

b. 2.2 d. 2.8.

ANS.d ref
Orbans-45


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20. How many teeth (out of 32) in the normal dentition oppose only ONE other tooth?

A. None B. 1

C. 2 D. 4

ANS.D.

Because of the shift of the mandibular teeth in a mesial direction due to the smaller size of the anterior teeth, most teeth have two opposing teeth. That is, they oppose their counterpart in the other arch, and a tooth either mesial or distal to that counterpart. There are two classes of exceptions. One of the exceptions is the mandibular central incisors. These two teeth (#24 and #25) oppose only the maxilary centrals (#8 and #9). The other exception is the maxillary third molars (#1 and #16), which oppose only the mandibular third molars.

Note that the mandibular third molars oppose both the maxillary second and third molars.

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