Glass Ionomer Cement — NDEB AFK MCQ
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Correct answer: A — Glass ionomer cement
Glass ionomer cement (GIC) bonds chemically to tooth structure via ionic bonding between carboxyl groups of polyacrylic acid and calcium in hydroxyapatite. It releases fluoride (antibacterial and remineralising effect) and has a coefficient of thermal expansion close to that of dentin. It is used as a liner, base, luting agent, and restorative material. Limitations include low fracture resistance and moisture sensitivity during initial setting.
Reference: Anusavice – Phillips' Science of Dental Materials, 13th ed., 2022