Which material among the Restorative and Esthetic Materials Most Commonly Used is specifically a glass ionomer?

• A. Glass Ionomer
• B. Gold Alloy
• C. Composite Resin
• D. Ceramic Castings

Answer: (A)

Glass ionomer materials are the option that truly are glass ionomer cements. They set by an acid-base reaction between fluoroaluminosilicate glass powder and polyacrylic acid liquid, and they bond chemically to tooth structure without a separate bonding agent. They also release fluoride over time, which can help protect against future decay. These features make them a common choice for restorative and esthetic uses, such as certain restorations and luting cements. The other options represent different material classes—gold alloy is a metal, composite resin is a resin-based tooth-colored material, and ceramic castings are ceramic restorations—so they are not glass ionomers.