Which property is associated with glass ionomer when used as a base?

The property associated with glass ionomer when used as a base is good adhesion and fluoride release. Glass ionomer materials bond well to both enamel and dentin, which enhances their effectiveness as a base under restoration materials. This strong adhesion helps to create a protective seal that can significantly reduce the risk of microleakage and postoperative sensitivity, contributing to the longevity of dental restorations.

Additionally, one of the most beneficial characteristics of glass ionomer is its ability to release fluoride over time. This fluoride release can provide a therapeutic effect, helping to remineralize adjacent tooth structure and offering ongoing protection against secondary caries. This dual function of sealing and releasing fluoride makes glass ionomer a favored choice for dental professionals when selecting a material for use underneath restorations.