The tongue of a patient deviates to one side whenever he sticks his tongue out. The cranial nerve that may be damaged is:

 # The tongue of a patient deviates to one side whenever he sticks his tongue out. The cranial nerve that may be damaged is:

A. Trigeminal nerve

B. Vagus nerve

C. Facial nerve

D. Hypoglossal nerve

The correct answer is D. Hypoglossal nerve.

HYPOGLOSSAL NERVE

Hypoglossal nerve is the twelfth cranial nerve. It supplies the muscles of the tongue. The hypoglossal nerve is tested clinically by asking the patient to protrude his/her tongue. Normally, the tongue is protruded straight forwards. If the nerve is paralysed, the tongue deviates to the paralysed side. 

Which of these is a pseudocyst?

 # Which of these is a pseudocyst?

A. Nasolabial cyst

B. Globulomaxillary cyst

C. Traumatic cyst

D. Radicular cyst

The correct answer is C. Traumatic cyst.

Traumatic cyst is also called as Solitary bone cyst, hemorrhagic cyst, extravasation cyst, unicameral bone cyst, simple bone cyst, idiopathic bone cavity. The traumatic cyst is a pseudo cyst (lacks an epithelial lining) and an uncommon lesion comprises about 1% of all jaw cysts. It occurs in other bones of the skeleton as well.

Which type of ameloblastoma appears to be aggressive with a marked proclivity for recurrence?

 # Which type of ameloblastoma appears to be aggressive with a marked proclivity for recurrence?

A. Follicular ameloblastoma

B. Plexiform ameloblastoma

C. Granular cell ameloblastoma

D. Acanthomatous ameloblastoma

The correct answer is C. Granular cell ameloblastoma.

Granular cell ameloblastoma is aggressive with a marked proclivity for recurrence. Follicular has highest recurrence rate (29%) with lowest for acanthomatous (4%). If 'aggressive' is asked, 'Granular cell ameloblastoma' is the answer, if only recurrence is asked, 'follicular ameloblastoma' is the answer.

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Which is the only inorganic general anesthetic in use?

 # Which is the only inorganic general anesthetic in use? 

a. Ether. 

b. Chloroform. 

c. Nitrous oxide. 

d. Cyclopropane. 

The correct answer is C. Nitrous oxide.

It is a colourless, odourless, heavier than air, noninflammable gas supplied under pressure in steel cylinders. It is nonirritating, but low potency anaesthetic; unconsciousness cannot be produced in all individuals without concomitant hypoxia; MAC is 105% implying that even pure N2O cannot produce adequate anaesthesia at 1 atmosphere pressure. Patients maintained on 70% N2O + 30% O2 along with muscle relaxants often recall the events during anaesthesia, but some lose awareness completely.