Why is glass ionomer cement (GIC) favored in ART and MID restorations?

• A. High fracture strength and invisibility in occlusion.
• B. Chemical adhesion to dentin, fluoride release, tolerance to moisture, and ease of use in minimal-prep cavities.
• C. Requires complete drying of tooth surfaces.
• D. Does not bond to dentin and has no fluoride release.

Answer: (B)

Glass ionomer cement is favored in ART and MID restorations because its properties align with the goals of minimally invasive, field-friendly dentistry. It chemically bonds to dentin, creating a seal that helps reduce microleakage without extensive tooth prep or bonding agents. It releases fluoride over time, which provides a cariostatic effect that can help protect adjacent tooth structure, especially important in high-risk patients. It tolerates moisture well, a crucial advantage in settings where perfect isolation isn’t possible, allowing for successful placement even with some salivary contamination. Finally, it is easy to use in minimal-prep cavities: it sets with an acid-base reaction and can adapt to small, conservatively prepared lesions, making rapid, simple restorations feasible in ART and MID approaches.