Computational Technology Resources - CCC

M. Ashrafi^1,2 and M. Doblare^1,2,3,4

¹Aragon Institute of Engineering Research, University of Zaragoza, Zaragoza, Spain
²Tissue MicroEnvironment Laboratory, University of Zaragoza, Zaragoza, Spain
³Aragon Institute of Health Research
⁴Centro de Investigacion Biomedica en Red en Bioingenieria, Biomateriales y Nanomedicina

Keywords: dental ceramics, crown fracture, mastication loading, XFEM.

Abstract

Ceramics used as restorations in dental crowns are extensively used due to their aesthetic result and corrosion resistance. However, they may fail under usual loads due to intrinsic britleness of ceramic materials. This is especially likely in the posterior region where occlusal forces can lead to deterioration of the dental crowns. This study aims at investigating the behavior of different ceramic used for dental crowns. This analysis is performed by means of numerical modeling using the extended finite element method that allows to follow the evolution of the crack appearance and propagation. For this purpose, a three-dimensional finite element model of the mandible and all its components was developed. Then, we compared the behavior of different materials usually used for dental restorations such as Feldspar ceramic (FC), Hybrid high-performance polymer composite resin (HPP), Lithium disilicate (LDS), Polymer-infiltrated ceramics (PIC), and Yttria stabilized tetragonal zirconia (Zr). All of them were also compared with enamel. Also, we considered two ways for loading the occlusal antagonist surfaces: (i) by applying the displacement on the surface of the first molar; (ii) by applying tooth-to-tooth contact. Zr did not damage in any of both models, while other materials fractured. It can be concluded that Zr, according to the assumptions of this study, is more resistant to occlusal forces than other ceramic materials used in dental restorations.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 6 PROCEEDINGS OF THE SEVENTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: P. Ivanyi, J. Kruis and B.H.V. Topping Paper 9.1 On failure of ceramic restorative crowns under mastication loads M. Ashrafi^1,2 and M. Doblare^1,2,3,4 ¹Aragon Institute of Engineering Research, University of Zaragoza, Zaragoza, Spain ²Tissue MicroEnvironment Laboratory, University of Zaragoza, Zaragoza, Spain ³Aragon Institute of Health Research ⁴Centro de Investigacion Biomedica en Red en Bioingenieria, Biomateriales y Nanomedicina doi:10.4203/ccc.6.9.1 Full Bibliographic Reference for this paper M. Ashrafi, M. Doblare, "On failure of ceramic restorative crowns under mastication loads", in P. Ivanyi, J. Kruis, B.H.V. Topping, (Editors), "Proceedings of the Seventeenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 6, Paper 9.1, 2023, doi:10.4203/ccc.6.9.1 Keywords: dental ceramics, crown fracture, mastication loading, XFEM. Abstract Ceramics used as restorations in dental crowns are extensively used due to their aesthetic result and corrosion resistance. However, they may fail under usual loads due to intrinsic britleness of ceramic materials. This is especially likely in the posterior region where occlusal forces can lead to deterioration of the dental crowns. This study aims at investigating the behavior of different ceramic used for dental crowns. This analysis is performed by means of numerical modeling using the extended finite element method that allows to follow the evolution of the crack appearance and propagation. For this purpose, a three-dimensional finite element model of the mandible and all its components was developed. Then, we compared the behavior of different materials usually used for dental restorations such as Feldspar ceramic (FC), Hybrid high-performance polymer composite resin (HPP), Lithium disilicate (LDS), Polymer-infiltrated ceramics (PIC), and Yttria stabilized tetragonal zirconia (Zr). All of them were also compared with enamel. Also, we considered two ways for loading the occlusal antagonist surfaces: (i) by applying the displacement on the surface of the first molar; (ii) by applying tooth-to-tooth contact. Zr did not damage in any of both models, while other materials fractured. It can be concluded that Zr, according to the assumptions of this study, is more resistant to occlusal forces than other ceramic materials used in dental restorations. download the full-text of this paper (PDF, 2840 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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