What is the primary use of zinc phosphate type I?

The primary use of zinc phosphate type I is as a permanent cement for dental restorations. This material is valued in dentistry for its excellent adhesion to tooth structure and ability to withstand the stresses placed on it in a functional environment. Zinc phosphate exhibits low solubility in oral fluids, providing long-term stability and durability for cementing crowns, bridges, and other fixed prosthetics.

Furthermore, the other options present uses that do not align with the properties or intended function of zinc phosphate type I. For example, it is not typically used for temporary restorations, as dental professionals prefer materials that can be easily removed or are designed specifically for that purpose. Its insulating properties are also not the primary characteristic, as other materials like glass ionomer or resin-based products are more commonly utilized for cavity bases. Lastly, while zinc phosphate may have some mild interactions in the context of allergic reactions, it is not specifically used for treating such conditions. The primary strength of zinc phosphate lies in its effectiveness as a permanent dental cement.