*Article* **Numerical Modeling of a New Type of Prosthetic Restoration for Non-Carious Cervical Lesions**

**Anna A. Kamenskikh 1,\* , Lyaysan Sakhabutdinova <sup>1</sup> , Nataliya Astashina <sup>2</sup> , Artem Petrachev <sup>2</sup> and Yuriy Nosov <sup>1</sup>**


**Abstract:** The paper considers a new technology for the treatment of non-carious cervical lesions (NCCLs). The three parameterized numerical models of teeth are constructed: without defect, with a V-shaped defect, and after treatment. A new treatment for NCCL has been proposed. Tooth tissues near the NCCLs are subject to degradation. The main idea of the technology is to increase the cavity for the restoration of NCCLs with removal of the affected tissues. The new treatment method also allows the creation of a playground for attaching the gingival margin. The impact of three biomaterials as restorations is studied: CEREC Blocs; Herculite XRV; and Charisma. The models are deformed by a vertical load from the antagonist tooth from 100 to 1000 N. The tooth-inlay system is considered, taking into account the contact interaction. Qualitative patterns of tooth deformation before and after restoration were established for three variants of the inlay material.

**Keywords:** tooth; NCCL; contact; modeling; finite element method (FEM); biomaterials; strain

**Citation:** Kamenskikh, A.A.;

Sakhabutdinova, L.; Astashina, N.; Petrachev, A.; Nosov, Y. Numerical Modeling of a New Type of Prosthetic Restoration for Non-Carious Cervical Lesions. *Materials* **2022**, *15*, 5102. https://doi.org/10.3390/ma15155102

Academic Editor: Oskar Sachenkov

Received: 20 June 2022 Accepted: 19 July 2022 Published: 22 July 2022

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