MCQs in Oral Surgery

1) The most important barrier to the diffusion of local anaesthetic within the nerve is

a) epineurium  b) endoneurium  c) perilemma  d) none of the above

ANS: 

2)  The branch of the external carotid artery given at the level of the tip of the greater cornu of hyoid bone is

a) superior thyroid  b) lingual  c) facial  d) ascending pharyngeal

ANS:

3) In orthognathic surgery, which of the following jaw movements has the least chances of relapse.

a) superior repositioning of maxilla  b) mandibular advancement  c) inferior repositioning of maxilla  d) mandibular advancement with genioplasty.

ANS:

4) The muscle most commonly affected in myofascial pain dysfunction syndrome is

a) masseter  b) medial pterygoid  c) lateral pterygoid  d) temporalis

ANS:

5) Which of the following statements is not wrong?

a) The odontogenic keratocyst has the highest recurrence rate amongst the odontogenic cysts.

b) Carnoys solution may be used to prevent the chances of recurrence.

c) All of the above.

d) None of the above.

ANS:

Multiple Choice questions

1) The space that lies between the anterior and posterior bellies of digastric is

   a) Submandibular.              

   b) Sublingual.

   c) Canine space

   d) Buccinator space.

Ans. A 

2)  Osteomyelitis of maxilla is rare due to all of this except:

a)      Extensive blood supply to maxilla.

b)      Abundant medullary spaces

c)      Thick cortical plates

d)     Porous nature of membranous bone

Ans. C

3) The Al-kayat and Bramely approach to the TMJ is a modification of the

a)      Hemi-coronal approach.

b)      Preauricular approach.

c)      Retroauricular approach.

d)     Risdon’s approach.

Ans. B

4) Early movement of TMJ following surgery for TMJ ankylosis is

a)      Desirable

b)      Contra indicated

c)      Harmful

d)     Both band c.

Ans . A

5) All are advantages of marsupialization except

a)      Allows primary healing

b)      Allows eruption of teeth

c)      Reduces blood loss

d)     Alveolar ridge is preserved

Ans. A

Local Anaesthesia II

1). Most common complication of inferior alveolar nerve block is

a)      Trismus

b)      Facial palsy

c)      Haematoma

d)     None of the above

ANS:  A

2) Which of the following block anaesthesia procedure is most likely to result in hematoma

         a) mental nerve block

         b) infraorbital nerve block

         c)  inferior alveolar nerve block

         d) Posterior superior alveolar nerve block 

   ANS  d

3) Paresthesia of the lip results in

  

a)      numbness in the area

b)      hypersensitivity in the area

c)      tingling sensation in the area

d)     all of the above

ANS  d

4) Initial toxic reaction to xylocaine injection is

        a)  Twitching of the muscles

        b)   shivering

         c) Talkativeness of patient

         d)   sleepy feeling

ANS   d

5)      Trismus after inferior alveolar nerve block is most likely due to

a)      Hematoma formation

b)      Damage to medial pterigoid

c)      Injection into parotid gland

d)     Injury to mandibular nerve

ANS  b

6)      which of the following LA causes vasoconstriction without addition of vasoconstrictor

a)      Cocaine

b)      Lidocaine

c)      Procaine

d)     Bupivacaine

ANS    a

Local Anaesthesia

Local Anaesthesia

1). Adrenaline is added to local anesthetic agents because it

a)      Potentiate the action of all anesthetic agents

b)      Increases the rate of destruction of local anesthetic agent

c)      Decrease the rate  of absorption of local anaesthetic at injection site

d)     Prevents deterioration of anaesthetic solution

ANS: C

2). Amide type of local anaesthetic agents undergo biotransformation primarily in

a)      Kidney

b)      Liver

c)      Plasma

d)     No biotransformation

ANS: C

3). Toxic dose of lignocaine with adrenaline is

a)      5 mg/kg body wt

b)      10 mg/kg body wt

c)      15 mg/kg body wt

d)     20 mg/kg body wt

ANS: A

4). Of the following in which condition local anaesthesia is ineffective

a)      Edema

b)      Localized infection

c)      Hematoma

d)     Anemia

ANS B

5). All of the following areas become anaesthetized by inferior alveolarar nerve block except

a)      Lower incisors

b)      Lower third molars

c)      Buccal gingiva of mandibular second molars

d)     Mandibular 2^nd premolar

ANS C

6). Anterior palatine nerve is anaesthetized by anterior palatine nerve block , the subjective symptoms include

a)      Feeling of numbness of posterior palate

b)      Feeling of numbness in anterior part of palate near incisors

c)      Feelin of numbness of entire palate

d)     Little or no subjective symptoms

ANS: a

TUMOURS

TUMOURS

1). Lesion treated by marginal resection are

a)      Ameloblastoma

b)      CEOT

c)      Myxoma

d)     All of the above

ANS: D

2). Extraoral segmental resection is done through

a)      Hind’s approach

b)      Pre auricular incision

c)      Gille’s approach

d)     Popowich’s approach

ANS: A

3). ‘Eyes upturned to heaven gaze’ is a characteristic feature of _____ cherubism

a)      Grade I

b)      Grade II

c)      Grade III

d)     Both (a) and (b)

ANS: C

4). Which of the following is FD

a)      Mazabrand synd.

b)      Lichenstein synd.

c)      Both of above

d)     None of above

ANS: C

5). A safe margin of uninvolved bone is ___ for solid and multicystic lesions

a)      1 cm

b)      2 cm

c)      3 cm

d)     Not always necessary.

Ans: B

cysts

CYSTS

1). Which of the following is not a sign of gorlin’s syndrome

a)      Bifid ribs

b)      Hypertelorism

c)      Multiple tori

d)     Basal cell nevi

ANS: C

2). Cyst enlargement occurs due to

a)      Presence of low grade infection

b)      Collagenase activity

c)      Increased hyperosmolarity

d)     All of the above

ANS: D

3). Rx of OKC

a)      Pastsch I

b)      Partsch II

c)      Ennucleation

d)     Extraction of tooth

ANS: C

4). All are advantages of marsupialization except

a)      Allows primary healing

b)      Allows eruption of teeth

c)      Reduces blood loss

d)     Alveolar ridge is preserved

ANS: A

5). Follow up for okc for early detection of any recurrences should be done at least upto

a)      5 yrs

b)      1 yr

c)      8 yrs

d)     3 yrs

ANS: C

General Anaesthesia

General Anaesthesia

1). According to Mallampatir’s grading, which of the following presents maximum difficulty during intubation:

a)      Class I

b)      Class IV

c)      Class III

d)     Class V

ANS: B

2) All of the following are objectives of premedication except

a)      Amnesia

b)      Reduction of stomach acidity and volume

c)      Prophylaxis against allergies

d)     Hypnosis

ANS: D

3). N2O use should be avoided especially drring_____ trimester of pregnancy

a)      First

b)      Second

c)      Third

d)     All

ANS: A

4). All are the complications of dental anaesthesia except

a)      Hypoxia

b)      Cardiac dusarrythemias

c)      Angina pectoris

d)     Mouth breathing

ANS: C

5). ‘Finger sweep method is used for

a)      Unconscious patients

b)      Before inducing G A

c)      Mandibular # pt.

d)     None of the above

ANS: A