What is a core build-up commonly made of in restorative dentistry?

In restorative dentistry, a core build-up is typically made using glass ionomer cement mixed with metal. This choice is favored primarily for its beneficial properties, including its ability to bond well to tooth structure and its fluoride-releasing capability, which can help protect against secondary caries. Glass ionomer cement, when reinforced with metal, provides a strong foundation for subsequent restorations, especially in cases where a significant amount of the tooth structure has been lost.

Choosing glass ionomer cement mixed with metal also takes advantage of the material's adhesive qualities, allowing for better integration with the remaining tooth structure. This is particularly crucial in preparing the tooth for further restorative procedures like crowns, ensuring durability and longevity.

Other materials such as composite resin and amalgam are used in various restorative applications, but they do not offer the same specific benefits when used for core build-up. Calcium hydroxide, on the other hand, is primarily an indirect pulp capping material and not typically used for core build-ups as it lacks the strength needed for such applications. Thus, glass ionomer cement mixed with metal remains the optimal choice for creating a solid foundation in restorative dentistry.