Glass ionomer Type 4 is primarily used for what purpose?

Glass ionomer Type 4 is primarily utilized for restoring pits and fissures. This material is particularly well-suited for this purpose due to its excellent adhesive properties and its ability to release fluoride, which can help in remineralizing the tooth structure and preventing future caries. When used in pits and fissures, the glass ionomer can effectively seal these areas, providing a barrier against bacteria and food particles, while also integrating with the tooth structure.

In this context, it serves a preventive role, addressing common vulnerabilities found in posterior teeth where decay is likely to initiate due to the morphology of the pits and fissures. The specific formulation of Type 4 glass ionomer allows for better handling and provides appropriate working and setting times, making it ideal for this application in dental restorative procedures.