AH Plus Sealer — MFDS Part 1 MCQ

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HardRestorative PrinciplesAH Plus SealerMFDS Part 1

A dentist is comparing conventional AH Plus with AH Plus Bioceramic before obturating a prepared root canal. Which setting chemistry correctly describes conventional AH Plus?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: A — Epoxide groups reacting with amine hardeners

Conventional AH Plus is an epoxy resin-based sealer whose epoxide components react with amine hardeners, making A correct. It should not be confused with AH Plus Bioceramic, a separate calcium silicate-based product. Option D describes zinc oxide-eugenol sealers. Option B represents the formulation associated with some calcium hydroxide-containing sealers. Option E describes hydraulic calcium silicate or bioceramic sealers, including MTA-related materials. Option C is the acid-base setting reaction of a glass ionomer material. The original key was correct, but the stem was too elementary for the specified Hard tier and did not address the potential confusion created by the similarly named bioceramic product.

Reference: Álvarez-Vásquez JL et al. Epoxy resin-based root canal sealers: An integrative literature review. Dental and Medical Problems. 2024;61(2):279-291. https://pubmed.ncbi.nlm.nih.gov/38686970/