A cement formed by acid-base reaction between activated zinc oxide powder and eugenol. The formation of zinc oxide eugenol chelate makes the cement solidify and harden. The analgesic and antibacterial functions of eugenol can soothe congested pulp. Clinically, liquid clove oil is commonly used as an analgesic for acute pulpitis, while zinc oxide clove oil cement is used for deep caries underlay and temporary sealing of cavities.