Which is a property of glass ionomer cement?

• A. Fluoride-releasing
• B. Non-fluoride releasing
• C. Cannot bond to enamel
• D. Used only for permanent fillings

Answer: (A)

Fluoride release is a characteristic property of glass ionomer cement. The material releases fluoride ions from the glass component as it sets and continues to release them over time, which helps inhibit demineralization and promote remineralization of adjacent enamel and dentin. This anti-cariogenic benefit is a key reason glass ionomer cements are favored in many clinical scenarios, especially for patients at higher caries risk. In addition to fluoride release, the cement chemically bonds to tooth structure through interaction between its polyacrylate chains and the calcium in hydroxyapatite, allowing adhesion to enamel and dentin rather than relying solely on mechanical retention. It’s also used beyond permanent fillings, serving as a luting agent, fissure sealant, or for certain temporary restorations, which makes the notion of being used only for permanent fillings incorrect.