Glass Ionomer Cement
A dental material that bonds chemically to tooth structure by reacting an acid-degradable glass with a water-soluble polymer acid, used for restorations, liners, and luting.
Full Definition
Glass ionomer cement (GIC) is formed by an acid-base reaction between a calcium aluminosilicate glass powder and a polyacrylic acid solution. It releases fluoride ions, which can inhibit secondary caries, and bonds directly to enamel and dentine without requiring a separate adhesive. Editors should be aware that 'glass ionomer cement' is the preferred full form; 'glass ionomer' alone is acceptable in subsequent references. The abbreviated form GIC should be defined at first use. It should not be confused with resin-modified glass ionomer, which contains additional monomer components.
Usage
Usage note: Abbreviate to GIC after first full use. Do not confuse with resin-modified glass ionomer cement (RMGIC), which is a distinct material class.
In Context
- "Glass ionomer cement was selected as the base material given the patient's high caries risk." — Clinical case report
- "GIC is described under ISO 9917-1 as a Type I luting cement." — Standards compliance document