RMGIC Definition — NDEB AFK MCQ

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EasyDental MaterialsRMGIC DefinitionNDEB AFK

Which type of glass ionomer cement has been chemically modified to include a resin component that undergoes light-curing in addition to the acid-base setting reaction?

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Correct answer: A — Resin-modified glass ionomer cement (RMGIC)

Resin-modified glass ionomer cement (RMGIC, e.g., Vitrebond, Fuji II LC) contains a resin component (typically HEMA and a photo-initiator) that undergoes light-initiated polymerisation in addition to the conventional acid-base setting reaction. This dual-cure mechanism provides: (1) command set with light curing; (2) reduced moisture sensitivity during initial setting; (3) improved mechanical properties compared to conventional GIC; and (4) retained GIC advantages (fluoride release, chemical adhesion to tooth). RMGIC is widely used as a liner/base, Class V restoration, and paediatric restorative material.

Reference: Anusavice – Phillips' Science of Dental Materials, 13th ed., 2022