According to the different treatment objects, the etchants are divided into enamel etchants, dentin etchantsand ceramic restoration etchants, which provide suitable pretreatment solutions for different tooth tissues orrestoration materials. Etching agents demineralize or roughen the tooth surface through chemical action, increase the surface areaand expose dentin tubules or enamel micropores, providing a stronger bonding foundation for restorative materials. Etching agents are used in coniunction with new dental materials to optimize the restoration effect
