Dental post and cores are tooth upgrades as a part of fixed-prosthetic treatment on the non vital tooth. They always serves as support for different types of crowns. The condition for upgrading the tooth structure and made post and core is a properly endodontically cured tooth. They are also indicated in all clinical situations, where there is a lack of clinical tooth crowns for the retintion the crown. Most commonly clinical situations for indication for posta and cores are non vital tooth crown fractures . They can be also needed in the abrasion of the teeth, where the reduction of the crown length is present, providing extension of the clinical crown length after endodontic procedure. Nowadays there are a lot of clinical procedures with the whole range of upgrades that differ in the manufacturing process, material and form, extracoronary and intraradular part of the upgrade. The basic clasiffication of the tooth upgrades is on individual post and cores and ready-made post and cores. Individual post and cores are much more precise because the upgrade is adjust to the tooth. The process of upgrading involves the co-operation of the dnetal laboratory thus extending the clinical procedure. Ready made upgrades comes as finished products in various shapes and materials and the tooth is needed to be adapted to them . The clinical procedure is shorter, but the open question remains, are we difined good indication of this type of substitution due to the size and shape of the extracoronal part of the ready made post and cores. The preparation of the tooth, especially of the intraradicular part of the upgrading is a very important and accurate procedure, and needs a skill of the doctor of dental medicine. The cementing process is also extremely important as well as the choice of cement types depending on the type and material of the post and core upgrade of the tooh.