Root Canal Irrigation — NDEB AFK MCQ

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EasyEndodonticsRoot Canal IrrigationNDEB AFK

Which irrigant is considered the gold standard for root canal debridement due to its ability to dissolve organic tissue and provide antimicrobial action?

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Correct answer: B — Sodium hypochlorite (NaOCl)

Sodium hypochlorite (NaOCl, typically 1-5.25% concentration) is the gold standard root canal irrigant. It is the only irrigant that dissolves necrotic and vital organic pulp tissue, has broad-spectrum antimicrobial activity, and disrupts biofilm. EDTA (17%) is used to remove the inorganic smear layer. Chlorhexidine has antimicrobial action but cannot dissolve organic tissue. A combination protocol (NaOCl then EDTA final rinse) is standard.

Reference: Torabinejad – Endodontics: Principles and Practice, 6th ed., 2021