Pulp capping is a dental procedure used to prevent complete exposure of the dental pulp. In cases where the dental caries has propagated very close to the dental pulp, the dental pulp is covered only with a very thin layer of dentine. In order to prevent the pulp to be exposed to external agents it needs to be covered with a special material. Dentists use calcium hydroxide od MTA. Both of these agents have a sedative effect of the pulp and stimulate it to form a layer of reparative dentin that will have a protective role. There are two types of capping: direct and indirect pulp capping.