This paper presents the results of a comparative experimental study of the strength characteristics of blocks made from a domestic composite material and foreign analogues used in prosthetic dentistry. The tests were carried out to determine resistance to diametral tensile strength in strict accordance with the requirements of current regulatory documents and GOST standards, which ensured the comparability and reproducibility of the obtained results. The aim of the study was a comprehensive assessment of the mechanical properties of the Russian composite material in order to determine the feasibility of its use in the fabrication of dental crowns and other prosthetic structures operating under increased functional loads. For the study, standard specimens of composite blocks were manufactured and tested under identical loading conditions, deformation rates, and temperature regimes. The experimental data obtained were subjected to statistical processing and comparative analysis with the corresponding indicators of foreign materials widely used in clinical practice. Particular attention was paid to the evaluation of ultimate strength values and the fracture behavior of the specimens. As a result of the study, it was established that the domestic composite material demonstrates a level of diametral tensile strength comparable to that of foreign analogues and, in some cases, is not inferior to them in terms of key mechanical characteristics. This indicates the high quality of the developed material and its potential for practical application in dentistry. The obtained results confirm the possibility of using the Russian composite material in the fabrication of crowns and other prosthetic restorations, and also create prerequisites for the further development and improvement of domestic dental composite materials and the expansion of their clinical application.
Vahobov et al. (Sun,) studied this question.