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Ouldyerou A, Mehboob H, Mehboob A, Merdji A, Aminallah L, Mukdadi OM, Barsoum I, Junaedi H. Biomechanical performance of resin composite on dental tissue restoration: A finite element analysis. PLoS One 2023; 18:e0295582. [PMID: 38128035 PMCID: PMC10734934 DOI: 10.1371/journal.pone.0295582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Accepted: 11/23/2023] [Indexed: 12/23/2023] Open
Abstract
This study investigates the biomechanical performance of various dental materials when filled in different cavity designs and their effects on surrounding dental tissues. Finite element models of three infected teeth with different cavity designs, Class I (occlusal), Class II mesial-occlusal (MO), and Class II mesio-occluso-distal (MOD) were constructed. These cavities were filled with amalgam, composites (Young's moduli of 10, 14, 18, 22, and 26 GPa), and glass carbomer cement (GCC). An occlusal load of 600 N was distributed on the top surface of the teeth to carry out simulations. The findings revealed that von Mises stress was higher in GCC material, with cavity Class I (46.01 MPa in the enamel, 23.61 MPa in the dentin), and for cavity Class II MO von Mises stress was 43.64 MPa, 39.18 MPa in enamel and dentin respectively, while in case of cavity Class II MOD von Mises stress was 44.67 MPa in enamel, 27.5 in the dentin. The results showed that higher stresses were generated in the non-restored tooth compared to the restored one, and increasing Young's modulus of restorative composite material decreases stresses in enamel and dentin. The use of composite material showed excellent performance which can be a good viable option for restorative material compared to other restorative materials.
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Affiliation(s)
- Abdelhak Ouldyerou
- Department of Mechanical Engineering, Faculty of Science and Technology, University of Mascara, Mascara, Algeria
| | - Hassan Mehboob
- Department of Engineering Management, College of Engineering, Prince Sultan University, Riyadh, Saudi Arabia
| | - Ali Mehboob
- Advanced Digital & Additive Manufacturing Center, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Ali Merdji
- Department of Mechanical Engineering, Faculty of Science and Technology, University of Mascara, Mascara, Algeria
| | - Laid Aminallah
- Department of Mechanical Engineering, Faculty of Science and Technology, University of Mascara, Mascara, Algeria
| | - Osama M. Mukdadi
- Department of Mechanical and Aerospace Engineering, West Virginia University, Morgantown, West Virginia, United States of America
| | - Imad Barsoum
- Advanced Digital & Additive Manufacturing Center, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
- Department of Engineering Mechanics, Royal Institute of Technology – KTH, Teknikringen, Stockholm, Sweden
| | - Harri Junaedi
- Department of Engineering Management, College of Engineering, Prince Sultan University, Riyadh, Saudi Arabia
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Additively Manufactured Commercial Co-Cr Dental Alloys: Comparison of Microstructure and Mechanical Properties. MATERIALS 2021; 14:ma14237350. [PMID: 34885499 PMCID: PMC8658371 DOI: 10.3390/ma14237350] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 11/23/2021] [Accepted: 11/27/2021] [Indexed: 12/03/2022]
Abstract
Laser-powder bed fusion (LPBF) is one of the preferred techniques for producing Co-Cr metal structures for dental prosthodontic appliances. However, there is generally insufficient information about material properties related to the production process and parameters. This study was conducted on samples produced from three different commercially available Co-Cr dental alloys produced on three different LPBF machines. Identically prepared samples were used for tensile, three-point bending, and toughness tests. Light microscopy (LM), scanning electron microscopy (SEM), and electron backscatter diffraction (EBSD) analyses of microstructure were performed after testing. Differences were observed in microstructures, which reflected statistically significant differences in mechanical properties (one-way analysis of variance (ANOVA) and Scheffé post hoc test (α = 0.05)). The material produced on the 3D Systems DMP Dental 100 had 24 times greater elongation ε than the material produced on the Sysma MySint 100 device and the EOS M100 machine. On the other hand, the material produced on the EOS M100 had significantly higher hardness (HV0.2) than the other two produced materials. However, the microstructure of the Sysma specimens with its morphology deviates considerably from the studied group. LPBF-prepared Co-Cr dental alloys demonstrated significant differences in their microstructures and, consequently, mechanical properties.
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