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2023 July (Supplementary) (2010 Scheme) · 40 marks · 120 min

Question

Adrenaline with lignocaine for tooth extraction

Q81 marksShort Answers

Answer

Adrenaline is added to lignocaine for tooth extraction because its alpha-1-mediated local vasoconstriction reduces blood flow at the injection site, slowing systemic absorption of lignocaine — this prolongs the duration of local anesthesia (important for the procedure length), reduces peak plasma lignocaine concentration (lowering systemic toxicity risk), and reduces bleeding at the extraction site, improving visibility and surgical conditions for the dentist.

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