Which type of cement would you select for a base when treating deep caries?

Choosing the appropriate cement for a base when treating deep caries is crucial for both the protection of the pulp and the success of the restorative treatment. Glass ionomer Type 3 cement is the preferred choice in this scenario because it possesses properties that support pulpal health and bond well to tooth structures.

Glass ionomer cement releases fluoride, which can help in remineralizing the surrounding tooth structure and preventing further carious activity. Its chemical composition allows for a good seal, which is essential when working near the pulp, as it reduces the risk of irritation and further complications. Additionally, glass ionomer cement has a coefficient of thermal expansion that is more similar to that of natural tooth structure compared to other types of cement, helping to minimize the risks of post-operative sensitivity and microleakage.

In contrast, the other types of cement mentioned have properties that may not be as beneficial for use as a base under deep caries. For example, ZOE Type 1 may not provide adequate adhesion or support in such scenarios. Zinc phosphate Type 1, although strong, is more acidic and can potentially irritate the pulp because of its low pH upon setting. Permanent Polycarboxylate has lower strength compared to glass ionomer and may not provide the