Influence of ionizing radiation on the mechanical properties of BisGMA/TEGDMA based experimental resin

Lmp, Campos; Boaro, Letícia Cristina Cidreira; Lkg, Santos; Parra, D.F.; Lugao, A.B.

doi:10.1016/j.radphyschem.2015.06.003

Cited by 9 publications

(1 citation statement)

References 27 publications

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“…The literature reports contradictory results regarding alterations in the properties of dental materials after applications of ionizing radiation. 9 , 14 , 27 , 28 The variations in material composition might provide an explanation for this fact (fillers, matrix, and initiator systems), the difference in intensity of the light cure unit, storage periods, different radiation sources (cobalt source and linear accelerator) as well as the dose used. All of these variables may cause polymer chains to cross-link, increasing their molecular weight, or they may scission, decreasing their molecular weight, affecting the characteristics of polymeric materials significantly.…”

Section: Discussionmentioning

confidence: 99%

Effect of Ionizing Radiation on the Mechanical Properties of Two Dental Materials Commonly Used in Primary Teeth

El-Korashy,

Elghazawy,

Abdelaziz

et al. 2023

International Journal of Clinical Pediatric Dentistry

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A bstract Aim The purpose of this in vitro study was to evaluate the effect of radiotherapy on flexural strength, microhardness, and surface roughness of bulk fill composite (X-tra fil) and glass ionomer (EQUIA Forte HT). Materials and methods A total of 40 specimens were prepared for each test and were divided into two groups according to the material used (composite or glass ionomer cement), and each group was divided into two subgroups ( n = 10) according to radiation condition, irradiated subgroup, subjected to 50 Gy by multienergy linear accelerator delivered in one shot and control subgroup. Results Control samples of flexural strength and microhardness had a significantly higher value than irradiated samples in both materials. Regarding the surface roughness, irradiated samples had a significantly higher value than the control samples in both materials. Conclusion Irradiation with a linear accelerator had a negative impact on the flexural strength and microhardness of both materials. Moreover, it increased the surface roughness for both materials. Bulk fill composite is the dental restorative material of choice in head and neck cancer patients undergoing radiotherapy due to its high mechanical properties before and after radiation. How to cite this article Nagi BM, El-Korashy DI, Amin A El-S, et al. Effect of Ionizing Radiation on the Mechanical Properties of Two Dental Materials Commonly Used in Primary Teeth. Int J Clin Pediatr Dent 2023;16(5):758–762.

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Section: Discussionmentioning

confidence: 99%

Effect of Ionizing Radiation on the Mechanical Properties of Two Dental Materials Commonly Used in Primary Teeth

El-Korashy,

Elghazawy,

Abdelaziz

et al. 2023

International Journal of Clinical Pediatric Dentistry

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Evaluation of polymerization shrinkage in dental restorative experimental composites based: BisGMA/TEGDMA, filled with MMT

Campos

Boaro

Ferreira

et al. 2016

J of Applied Polymer Sci

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This work concerns to the investigation of the polymerization shrinkage and mechanical properties in dental restoratives experimental composites filled with nano clay Montmorilonite (MMT) Cloisite® 10A nanoparticles, in glycidyl methacrylate resin, using experimental composites filled with silanized Aerosil OX‐50 Silica as a control group. Six formulations with BisGMA/TEGDMA based polymeric matrix (three added with MMT and three added with silanized silica as filler) containing 50, 60, and 70 wt % were investigated. Characterization of the experimental composites was established with the following analyses: Scanning Electron Microscope, (SEM); Thermo‐Mechanical Analysis, (TMA) for Shrinkage Polymerization; Differential Scanning Calorimetry Analysis (DSC); Knoop Micro Hardness analysis; X‐ray Diffraction (XRD); Degree of Conversion (DC); Elastic Modulus and Flexural Strength; Transmission Electron Microscopy (TEM). Statistical Analyses were realized using two‐way ANOVA (type and amount of filler) and Tukey's test. TMA results showed that composites filled with MMT nanoparticle present statistically lower polymerization shrinkage values and statistically high degree of conversion in all formulations tested, when compared to composites filled with silanized silica. XRD and TEM analyses showed evidences of the intercalation phenomenon in the MMT nanoparticles in relation to BisGMA/TEGDMA polymeric matrix. However, for Flexural Strength, groups filled with MMT nanoparticle showed statistically lower values in all concentration tested. At high filler concentration it was observed the appearance of tactoids and functionalization of MMT nanoparticle did not promote a strong interface adhesion between polymeric matrix and filler. In order to adjust the mechanical properties, it would be convenient to promote the concentration optimization of MMT nanoparticles. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43543.

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Dental composite resin: a review of major mechanical properties, measurements and its influencing factors

Suryawanshi

2022

Materialwissenschaft Werkst

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Nowadays, there is a large variety of dental restorative composite materials on the market, making it difficult to select the proper one. The mechanical properties of various dental materials determine how long they endure when used in the mouth. On the other hand, the therapeutic efficiency of these restorative materials cannot be predicted solely based on their mechanical properties. These features, on the other hand, help with the examination of the impact of changes in their composition. As a consequence, these tests can help the clinician choose the right material. The various mechanical properties can be investigated using a variety of laboratory experiments. The common laboratory tests used to evaluate the mechanical characteristics, composition, and classification of dental composite materials, as well as the factors that influence mechanical qualities, are discussed in this study.

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Influence of ionizing radiation on the mechanical properties of BisGMA/TEGDMA based experimental resin

Cited by 9 publications

References 27 publications

Effect of Ionizing Radiation on the Mechanical Properties of Two Dental Materials Commonly Used in Primary Teeth

Effect of Ionizing Radiation on the Mechanical Properties of Two Dental Materials Commonly Used in Primary Teeth

Evaluation of polymerization shrinkage in dental restorative experimental composites based: BisGMA/TEGDMA, filled with MMT

Dental composite resin: a review of major mechanical properties, measurements and its influencing factors

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