**5. Conclusions**

A comparative analysis was carried out on the deformation behavior of a pair of antagonist teeth during contact with and without mouthguards of different geometric configurations, with a range of functional loads (50–300 N). Data were obtained on the intensity of stresses and deformations, the parameters of the contact zone, as well as the dependence of the maximum level of deformation characteristics on the physiological load.

Analysis of the results of a series of numerical experiments established the following conclusions:


The thickness of 7 mm multilayer mouthguards can lead to a number of limitations when used by athletes. Additional practical research is required on the physical and psychoemotional state of patients when they are using it.

**Author Contributions:** Conceptualization, A.K., A.G.K. and I.B.; methodology, A.K.; software, A.K.; validation, A.K. and A.G.K.; writing—original draft preparation, A.K. and A.G.K.; writing—review and editing, A.K., A.G.K. and I.B.; visualization, A.K.; funding acquisition, A.K. All authors have read and agreed to the published version of the manuscript.

**Funding:** Anna Kamenskikh and Alex G. Kuchumov acknowledge the financial support of the Ministry of Science and Higher Education of the Russian Federation in the framework of the program of activities of the Perm Scientific and Educational Center "Rational Subsoil Use".

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** Not applicable.

**Conflicts of Interest:** The authors declare no conflict of interest.
