Short Qs

Question 1

Which one of the following statements is CORRECT about local anaesthetics?

a. The most commonly used anaesthetic in dental surgeries is 0.2% lidocaine with 1:80 000
adrenaline
b. Lidocaine must be stored below 5°C
c. Lidocaine has a longer lasting effect that bupivacaine
d. Lidocaine without adrenaline has a longer lasting effect than lidocaine with adrenaline
e. 3% prilocaine with 0.03IU/ml felypressin is a commonly used dental anaesthetic

Answer 1

e. 3% prilocaine with 0.03IU/ml felypressin is a commonly used dental anaesthetic

Question 2

What type of somatosensory receptor is associated with the perception of pain?

a. Proprioceptors
b. Mechanoreceptors
c. Nociceptors
d. Thermoreceptors
e. Baroreceptors

Answer 2

c. Nociceptors

Question 3

Which one of the following doses of adrenaline in the treatment of anaphylaxis is
CORRECT?

a. Adrenaline 0.5ml of 1:100 intramuscularly
b. Adrenaline 5ml of 1:100 intramuscularly
c. Adrenaline 0.5ml of 1:1000 intramuscularly
d. Adrenaline 5ml of 1:1000 intramuscularly
e. Adrenaline 0.5ml of 1:10 000 intramuscularly

Answer 3

c. Adrenaline 0.5ml of 1:1000 intramuscularly

Question 4

Which of the following statements is false, regarding the strategies that are employed to
prevent occupational exposure to blood and saliva contaminants in the dental surgery?

a. Universal level of cross infection control.
b. Careful surgery design.
c. Utility of barrier protection.
d. Replacing cytotoxic waste (sharps) bins when totally full.
e. Safe working practices.

Answer 4

d. Replacing cytotoxic waste (sharps) bins when totally full.

Question 5

Which of the following does the maxillary division of the Trigeminal Nerve NOT supply
sensory nerve supply to?

a. the skin on much of the anterior parts of the face
b. the nasal cavity
c. the anterior 2/3 of the tongue
d. the nasopharynx the maxillary sinus
e. the maxillary teeth and gingivae

Answer 5

c. the anterior 2/3 of the tongue

Question 6

A Short – 30G needle is used for:

a. infiltration procedures
b. exo-ligamentary technique
c. mental block injections
d. inferior dental block injections
e. posterior alveolar injections

Answer 6

a. infiltration procedures

OR

c. mental block injections

Question 7

A true natural rubber latex allergy is the result of a Type I immediate hypersensitivity reaction associated with which Immunoglobulin?

a. IgA
b. IgD
c. IgE
d. IgG
e. IgM

Answer 7

c. IgE

Question 8

Which nerve supplies the buccal soft tissues adjacent to the upper molar teeth?

a. Long buccal nerve
b. Posterior superior alveolar nerve
c. Greater palatine nerve
d. Middle superior alveolar nerve
e. Mylohyoid nerve

Answer 8

b. Posterior superior alveolar nerve

Question 9

What is the production rate of CSF and the normal total volume in an adult at any one time?

a. 300ml and 100ml
b. 300ml and 150ml
c. 500ml and 150ml
d. 550ml and 150ml
e. 600ml and 100ml

Answer 9

c. 500ml and 150ml

Question 10

Epinephrine added to a solution of lidocaine for local anaesthesia will:

a. Cause cyanosis locally.
b. Increase the risk of convulsions.
c. Increase the duration of local anaesthesia.
d. Increase the absorption of lidocaine.
e. Decrease the heart rate when absorbed.

Answer 10

c. Increase the duration of local anaesthesia.

Question 11

Dental Phobia may be diagnosed with an MDAS score of:

a) 1-4
b) 5-8
c) 9-14
d) 15-18
e) 19-24

Answer 11

e) 19-24

Question 12

The primary motor area is located on the:

a) Precentral gyrus.
b) Postcentral gyrus.
c) Middle frontal gyrus.
d) Superior temporal gyrus.
e) Middle temporal gyrus.

Answer 12

a) Precentral gyrus.

Question 13

Which of the following options regarding the ASA classification is CORRECT?

a) Class I: Normal, healthy patient
b) Class II: A patient with severe systemic disease limiting activity but not incapacitating
c) Class III: A Patient with mild systemic disease
d) Class IV: Moribund patient not expected to live more than 24 hours with or without treatment
e) Class V: A patient with incapacitating disease that is a constant threat to life

Answer 13

a) Class I: Normal, healthy patient

Question 14

The inferior horn of the lateral ventricle extends into the:

a) Frontal lobe of cerebral hemisphere.
b) Temporal lobe of cerebral hemisphere.
c) Occipital lobe of cerebral hemisphere.
d) Diencephalon.
e) Midbrain

Answer 14

b) Temporal lobe of cerebral hemisphere.

Question 15

The largest bundle of commissural fibres in the brain is known as:

a) Anterior commissure.
b) Posterior commissure.
c) Habenular commissure.
d) Corpus callosum.
e) Fornix.

Answer 15

d) Corpus callosum.

Question 16

Which of the following is NOT a receptor which drugs may influence?

a) Receptor operated ion channels.
b) G-protein coupled receptors.
c) Kinase-linked receptors.
d) Nuclear receptors.
e) Potassium regulated osmoreceptors.

Answer 16

e) Potassium regulated osmoreceptors.

Question 17

Which of the following is NOT a branch of the maxillary artery?

a) Inferior alveolar artery
b) Posterior superior alveolar artery
c) Sphenopalatine artery
d) Ascending palatine artery
e) Infra-orbital artery

Answer 17

d) Ascending palatine artery

Question 18

Which of the following statements is NOT TRUE with regard to lignocaine?

a) Blocks neuronal sodium channels
b) Will produce local anaesthesia in any nerve fibre
c) Can be administered into the spinal cord to produce epidural anaesthesia
d) May induce histamine release
e) Is used to treat cardiac dysrhythmias

Answer 18

c) Can be administered into the spinal cord to produce epidural anaesthesia