This article presents a comparative study of the strength characteristics of three composite materials tested under bending loads. The objects of the study included one Russian composite material and two foreign analogues manufactured using CAD/CAM chairside technology. The relevance of the work is determined by the fact that modern dental restorations require not only high aesthetics but also significant mechanical durability, especially in clinical situations where structures are subjected to pronounced bending stresses. The tests were carried out in accordance with the requirements of the current Russian State Standards, which ensured the reproducibility of the results and the accuracy of the subsequent analysis. The aim of the study was to determine the flexural strength, elastic modulus, fracture behavior, and to perform a comprehensive assessment of the effectiveness of each material under conditions approximating functional loads in the oral cavity. As part of the experiment, three-point bending tests were performed. For all specimens, the flexural strength values, magnitudes of elastic and plastic deformation, and characteristic features of crack formation were recorded. Based on the obtained data, a detailed comparison of the performance characteristics of the investigated composite blocks was conducted, including their resistance to mechanical loading, structural stability, and ability to maintain integrity under prolonged stress. The results of the study made it possible to draw conclusions regarding the suitability of each examined material for dental restorations fabricated using the CAD/CAM method. Both the advantages and the limiting factors of the Russian and foreign materials were identified, enabling clinicians to make more informed decisions when selecting materials depending on the specific clinical situation.