Which type of dental cement is commonly used for temporary restorations?

Glass ionomer cement is commonly used for temporary restorations due to its desirable properties. This material has good adhesion to tooth structures and is capable of releasing fluoride, which can help in preventing secondary decay at the margins of the restoration. Furthermore, glass ionomer cements are easy to manipulate and set quickly, making them convenient for temporary applications.

The other types of cement, while having specific uses in dentistry, are not typically chosen for temporary restorations. For instance, zinc phosphate is known for its strength but is not as effective in adhesion and can be irritating to the pulp if used for temporary purposes. Resin cement, while providing excellent esthetics and bond strength for permanent restorations, is more complex to use and not designed for temporary applications. Calcium hydroxide is primarily used for pulp capping and providing a protective layer, not as a material for restorations. Thus, the features of glass ionomer cement align well with the requirements for temporary dental restorations.