What is a common use of GIC as a cavity liner?

Glass Ionomer Cement (GIC) is commonly used as a cavity liner primarily because of its excellent properties that support dental restoration procedures, particularly under composite restorations. GIC serves multiple functions, including acting as a barrier against thermal shock, providing chemical bonding to the tooth structure, and releasing fluoride, which can help in the prevention of secondary caries.

When placed underneath composite restorations, GIC aids in improving the overall seal of the restoration, enhancing its longevity, and promoting better bonding between the restoration and the tooth structure. Its ability to withstand moisture during the early setting phase also makes it suitable for use in various clinical situations. This is why using GIC under composite restorations is a standard practice in dental procedures, ensuring that the restoration maintains its integrity over time and contributes to overall dental health.