Calcident 450® is a paste with a 45% calcium hydroxide content on an aqueous basis, which is recommended for direct and indirect pulp capping as well as for temporary root canal fillings. Calcident 450® is radiopaque and has a pH value of 12, which is responsible for the antibacterial effect of the paste. In addition, Calcident 450® is biocompatible and gentle to the pulp. It is suitable for underfilling under all restorative materials.