Issue 72

K. Akhmedov et alii, Fracture and Structural Integrity, 72 (2025) 280-294; DOI: 10.3221/IGF-ESIS.72.20

The greatest load-bearing capacity of the base was ensured by the location of the perforated PEEK framework on its inner side and in the center of the dome. At the same time, changing the location varied the load-bearing capacity of the RCD by  5%. The perforated framework located inside the PMMA base increased its stiffness. However, the presence of accommodation zones on the mucosa surface ensured the more comfortable wearing of the prosthesis. The presence of perforation in the PEEK framework reduced the load-bearing capacity of the base within 5% or did not change it (depending on the location of the PEEK framework). Adhesion between the base and the PEEK framework played a decisive role. Its absence reduced the load-bearing capacity of the base to the level of the RCD without a framework. Based on the obtained results, it was convincingly proven that the embedding of perforated reinforcing PEEK frameworks is a promising way to improve the load-bearing capacities of RCDs, considering the identified features of their behavior under typical operational loads. In doing so, further studies will focus on increasing the stiffness of the base due to modification of the framework design, as well as improving mechanical adhesion between the framework and the base through the variable perforation and other structural features.

A CKNOWLEDGEMENT

S

ergey Panin, Svetlana Bochkareva and Iliya Panov acknowledge support from the project FWRW-2021-0010 through the government research assignment for ISPMS SB RAS.

A BBREVIATION

CAE - computer aided engineering, FEM - finite element method, PEEK - polyetheretherketone, PMMA - polymethylmethacrylate, R С D - removable complete denture, SSS - stress–strain state, XFEM - extended finite element method

R EFERENCES

[1] Arutyunov, S.D. ed., (2021). Quality of life of patients with complete tooth loss and psychometric properties of the OHIP-20 DG questionnaire. Part 2. Monitoring at the stages of dental orthopedic treatment, Russian Dental J., 25(5), pp. 399–408. DOI: 10.17816/1728-2802-2021-25-5-399-408. (in Russian) [2] Dye, BA. (2017). The Global Burden of Oral Disease: Research and Public Health Significance, J Dent Res., 96(4), pp. 361-363. DOI: 10.1177/0022034517693567. [3] Ito, K. ed., (2015). JAGES Group. Individual- and community-level social gradients of edentulousness, BMC Oral Health., 15(34), DOI: 10.1186/s12903-015-0020-z. [4] Rajaraman, V. ed., (2018). Ashish Effect of edentulism on general health and quality of life, Drug Invention Today, 10(4), pp. 549-553. [5] Razak, P.A., ed., (2014). Geriatric oral health: a review article, J. Int. Oral Health, 6(6), pp. 110-116. PMID: 25628498; PMCID: PMC4295446. [6] Porfiriev, B.N. ed., (2023). Development of Subsidized Prosthodontic Care: Socio-Economic Problems and Opportunities, Studies on Russian Economic Development, 34(1), pp. 68–76. DOI: 10.1134/S1075700723010161 [7] Bayraktar, G., Duran, O. and Guvener, B. (2003). Effect of glass fibre reinforcement on residual methyl methacrylate content of denture base polymers, J. Dent, 31(4), pp. 297-302. DOI: 10.1016/s0300-5712(03)00026-5. PMID: 12735925. [8] Torres, A. ed., (2019). Technical quality of complete dentures: Influence on masticatory efficiency and quality of life, J. Prosthodont. 28, pp. 21-26. [9] Kumari, R. and Bala, S. (2021). Assessment of Cases of Complete Denture Fracture, J. Pharm. Bioallied Sci., 13(2), pp. 1558-1560. DOI: 10.4103/jpbs.jpbs_284_21.

292