Which material is commonly used as a base for dental cements due to its properties?

Glass ionomer is a commonly used material as a base for dental cements because of its unique properties that make it particularly advantageous in various dental applications. One of the primary benefits of glass ionomer is its ability to chemically bond to both tooth structure and metal, which enhances its retention in a dental environment. Additionally, it releases fluoride, which can help to protect the tooth structure from caries and promote healing.

Furthermore, glass ionomer cements have a thermal expansion coefficient similar to that of tooth structure, which minimizes the risk of microleakage that can lead to decay and sensitivity. Their biocompatibility makes them suitable for use in areas close to vital dental tissues, adding to their utility in restorative procedures.

In contrast, while composite resin and resin-modified glass ionomer also serve important functions in dental restorative practices, they may not have the same combination of properties that glass ionomer exhibits, such as fluoride release and the specific bonding characteristics relevant for cement bases. Amalgam, though durable, is not typically used for cement bases due to its metallic nature and the differences in bonding behavior compared to glass ionomer.