Local Anaesthesia Quiz

What is the main desirable effect of local anaesthesia in dentistry?

• Loss of temperature sensation

• Loss of all sensation

• Loss of pain sensation

• Loss of consciousness

Which type of nerve fibres do local anaesthetic agents act on?

• Sensory only

• Motor only

• Both sensory and motor

• Autonomic only

What is the main property of an ideal local anaesthetic?

• Permanent damage to tissues

• High systemic toxicity

• Rapid onset and short duration

• Specific and reversible action

Which type of local anaesthetic has a faster onset of action due to its lower pKa value?

• Ester

• Amide

• Both have the same onset

• None of the above

Which local anaesthetic has the highest protein binding capacity?

• Bupivacaine

• Prilocaine

• Lignocaine

• Procaine

Which local anaesthetic has the longest duration of action?

• Mepivacaine

• Lignocaine

• Bupivacaine

• Prilocaine

What is the main purpose of adding vasoconstrictors to local anaesthetic solutions?

• To induce vasodilatation

• To reduce operative bleeding

• To prolong consciousness

• To increase systemic uptake

Which naturally occurring vasoconstrictor is commonly used in dentistry?

• Dopamine

• Epinephrine

• Norepinephrine

• Serotonin

What is the main effect of epinephrine on the heart?

• Decrease in cardiac output

• No effect on the heart

• Vasodilatation in skeletal muscles

• Increase in heart rate and force of contraction

Which vasoconstrictor acts on the venous side rather than the arterial side?

• Norepinephrine

• Felypressin

• Epinephrine

• Dopamine