What is a significant advantage of glass ionomer cement?

Glass ionomer cement is widely praised for its ability to be non-irritating to the pulp when used in dental restorations. This property is particularly significant because it makes glass ionomer cement an excellent choice for use in deep cavities or in cases where dentin is exposed. The material releases fluoride, which can help to protect the tooth structure and may lead to less sensitivity and better outcomes for pulp health.

While the other options may have some merit, they do not fully capture the standout characteristics of glass ionomer cement. For instance, its aesthetic properties are generally not as strong as those of dental resins, which often provide better color matching and translucency. Similarly, while glass ionomer cement does bond to metal, its bond strength is not as exceptional as that of other materials specifically designed for metal bonding. Lastly, glass ionomer cement is typically not stronger than resin composites, which are known for their durability and resistance to fracture. This solidifies the non-irritating aspect as a key benefit when choosing materials for procedures that may involve deeper dentin or vital pulp.