Evaluation of mechanical behavior of premolar teeth with fissure sealant

Nejad, Reza Masoudi; Moghadam, Danial Ghahremani; Aslani, Mohammad; Aslani, Hoda; Moghaddam, Hamed Asghari; Berto, Filippo

doi:10.1016/j.engfailanal.2021.105568

Cited by 2 publications

(1 citation statement)

References 22 publications

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“…The accuracy of FE models is heavily reliant on the input material properties utilized in the material model. To determine the precise values of the model mechanical properties, an iterative FE analysis based on optimization is required 29 , 30 . The wedge indentation test is selected as the most suitable test for this purpose since it reflects the behavior of the DRC.…”

Section: Resultsmentioning

confidence: 99%

Experimental characterization and finite element investigation of SiO2 nanoparticles reinforced dental resin composite

Jaleh,

Kashfi,

Feizi Mohazzab

et al. 2024

Sci Rep

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In this study, a commercial dental resin was reinforced by SiO2 nanoparticles (NPs) with different concentrations to enhance its mechanical functionality. The material characterization and finite element analysis (FEA) have been performed to evaluate the mechanical properties. Wedge indentation and 3-point bending tests were conducted to assess the mechanical behavior of the prepared nanocomposites. The results revealed that the optimal content of NPs was achieved at 1% SiO2, resulting in a 35% increase in the indentation reaction force. Therefore, the sample containing 1% SiO2 NPs was considered for further tests. The morphology of selected sample was examined using field emission scanning electron microscopy (FE-SEM), revealing the homogeneous dispersion of SiO2 NPs with minimal agglomeration. X-ray diffraction (XRD) was employed to investigate the crystalline structure of the selected sample, indicating no change in the dental resin state upon adding SiO2 NPs. In the second part of the study, a novel approach called iterative FEA, supported by the experiment wedge indentation test, was used to determine the mechanical properties of the 1% SiO2-dental resin. Subsequently, the accurately determined material properties were assigned to a dental crown model to virtually investigate its behavior under oblique loading. The virtual test results demonstrated that most microcracks initiated from the top of the crown and extended through its thickness.

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Section: Resultsmentioning

confidence: 99%

Experimental characterization and finite element investigation of SiO2 nanoparticles reinforced dental resin composite

Jaleh,

Kashfi,

Feizi Mohazzab

et al. 2024

Sci Rep

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An In-Vitro Evaluation of Microleakage in Resin-Based Restorative Materials at Different Time Intervals

et al. 2022

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A vital feature of conservative dentistry is the adhesion of the restorative material to the tooth structure for restoration of the tooth substance lost due to dental decay, trauma, or dental imperfections. In a perfect world, a restorative material should generate a lasting adhesion by bonding the restoration with tooth tissues. The ingress of micro-organisms, oral fluids, molecules, and ions through microscopic spaces due to faulty adhesion between restoration and tooth structure is known as microleakage. This study is focuses on the evaluation of adhesive failures between the restorative materials. In the past, studies have focused more on the bonding potential of a restorative material with the tooth surface. Therefore, there is need to carry out a study that compares the microleakage between resin-based restorative materials in a sandwich manner with and without the intermediate bonding layer after immersion in 2% methylene blue dye at different time intervals. The restorative materials used were composite Ceram X Mono plus (DENTSPLY) and Z350 (3M ESPE), Vitremer resin modified glass ionomer cement (RMGIC) (3M ESPE), smart dentine replacement SDR (3M ESPE), Bond NT (DENTSPLY), and Universal Bond (3M ESPE). A light emitting diode (LED) was used to cure the specimens. Artificial saliva was used as a storage medium for the specimens. Thermocycling of specimens was carried out at 500 cycles/30 s and 1000 cycles/30 s. The world health organization (WHO) grading tool for microleakage was used to analyze fluid ingress in the specimens through disclosing by 2% methylene blue dye. The statistical analysis was carried out with one-way analysis of variance (ANOVA) and Tukey post hoc test, keeping the level of significance at p ≤ 0.05. In Grade 0 = 85 samples, Grade 1 = 10 samples, Grade 2 = 7 samples, Grade 3 = 16 samples, and in Grade 4 = 2 samples were identified. This study describes that no microleakage was observed in SDR and resin composite groups as compared to Vitremer and resin composite groups.

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Evaluation of mechanical behavior of premolar teeth with fissure sealant

Cited by 2 publications

References 22 publications

Experimental characterization and finite element investigation of SiO2 nanoparticles reinforced dental resin composite

Experimental characterization and finite element investigation of SiO2 nanoparticles reinforced dental resin composite

An In-Vitro Evaluation of Microleakage in Resin-Based Restorative Materials at Different Time Intervals

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