Introduction. Obtaining successful results in the root canal treatment of teeth damaged by caries and its complications, by dental traumas, in order to prevent tooth extractions by preserving the roots. Material and methods of research. Examining 30 patients aged 18-55 years, we established total and subtotal coronary dental lesions, in which case the treatment was possible with a post and core device, prefabricated from metal alloys or fiberglass. Results. It was possible to restore the morphology, functionality and proper aesthetics of the tooth. The degree of destruction of the coronary dental tissues is the main index for the post and core devices with the aim of ensuring the resistance of the future prosthetic construction. Conclusions. The clinical and paraclinical examination of the patients gave the opportunity to appreciate and to determine the indications, contraindications in order to use different types of the post and core prosthetic devices depending on the condition of the remaining hard tissues of the root of the tooth, the possibility of applying advanced techniques and various materials.