Zinc phosphate dental cement

Zinc phosphate dental cement is a professional-use material used in dental procedures to bond fillings, crowns, or bridges (as a luting agent) or as a protective base/liner under restorations. It hardens through a chemical reaction between zinc oxide powder and phosphoric acid, creating a durable yet non-medicated seal in the mouth. Clinicians rely on it for its strength and ability to insulate dental pulp from thermal changes.

These cements are non-sterile and designed for single-use only, requiring preparation by dental professionals in a clinical setting. Regulation varies by jurisdiction, but they are typically classified based on their primary function—whether as a restorative material or a bonding agent—rather than a fixed class. Availability is limited to dental offices and suppliers, as they lack the shelf-life or sterility needed for retail distribution.