Composite Resins - Multifunctional Restorative Material and Practical Approaches in Dental Field

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Posterior endodontically treated teeth are exposed to risk fracture due to the great masticatory forces developed in the area. Fiberglass posts are considered a practical solution for such situations, but their main disadvantage yet remains the poor adhesion to the remaining tooth structures. The purpose of the present study was to evaluate a material that could replace the use of fiberglass posts on posterior teeth. 32 premolars were selected and divided into 4 groups (n=8): the first group was considered the control group; the second group was composed of endodontically treated teeth that were filled with gutta-percha, but without any coronal restoration; the third group was composed of teeth that received the same endodontic treatment as in the second group but were restored with a fibreglass post and a light cured microfilled hybrid composite material; the fourth group was similar to the third one, except teeth were restored with a short-fibre-reinforced composite (EverX Posterior, GC Europe N.V., Leuven, Belgium) and a microfilled hybrid composite over it. The fracture resistance of all the teeth was tested using a universal testing device. One-way ANOVA and the Tukey post-hoc variation tests for multiple comparisons were used to analyze the results. The short-fibre-reinforced composite material increased the fracture resistance of endodontically treated teeth (1159.42 N), twice as much as that obtained by using fiberglass posts (522.35 N)). Within the limitations of the present study, EverX Posterior represents a better alternative compared to fiberglass posts in the crown and root reconstruction of posterior endodontically treated teeth.

Section: Discussionsupporting

confidence: 79%

Assessing Fracture Resistance of non Vital Teeth Using Two Different Composite Systems: Short-Fibre-Reinforced Composite and Glass Fibre Post with Microfilled Hybrid Composite

Cimpean¹,

Pop-Ciutrila²,

Buduru³

et al. 2021

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“…Among the most used resins in dental materials are the epoxy systems [12], bisphenol A-glycidyl methacrylate (Bis-GMA) [13], urethane-dimethacrylate (UDMA) [14], triethylene glycol dimethacrylate (TEGDMA) [15]. These resins are well known for their lower price, compared to porcelains, and reliable potential in making medical-related products especially on account of the suitable properties of resistance to abrasion, moderate polishing requirements and manageable shrinkage [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Influence of Alumina Nanoparticles on the Mechanical Properties of a Bioresin Composite

Earar¹,

Grigore²,

Antohe³

et al. 2021

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The aim of this study is to characterize (wettability, surface roughness and gloss) and test (microhardness and diametral compression) four types of light-cured composite resins, one of which is commercial. The first lab-made composite is the reference, obtained by mechanical mixing of three monomers, in equal concentrations. The following two lab-made materials can be considered nanocomposites because they were mechanically mixed in the base solution (Bis-GMA/TEGDMA/Bis-EMA) with α-Al2O3 nanopowders, with a concentration of 5 wt.% for one solution and 10 wt.% for the other. The benchmark material comparison for these lab-made composite and nanocomposite resins is the bioresin system, Filtek Supreme Ultra Universal Restorative. Results were promising, especially for the 10 wt.% Al2O3/Bis-GMA/TEGDMA/Bis-EMA system, characterized by mechanical improvment in comparison with the reference composite.

“…The idea of using resins in dental implantology is at a mature stage, with good potential in making products, such as prosthesis bases, artificial teeth, temporary prostheses, gutters, sealants, etc., due to the satisfactory properties of abrasion resistance, light polishing, minimum shrinkage [9,10] and compatibility with the tissues on which it aggregates [11].…”

Section: Introductionmentioning

confidence: 99%

“…In bioengineering, the use of nanoparticles in common products has been studied for almost 30 years [9], proving an excellent potential in covering gaps in research into new materials for dental reconstructions. Nano-additives, in particulate form, are incorporated into composite dental resins to provide restorative properties closely identical to a natural tooth, such as strength, appearance and adherence, also [11].…”

Section: Introductionmentioning

confidence: 99%

Influence of Alumina Nanoparticles on the Mechanical Properties of a Bioresin Composite

Ciucă¹,

Solomon²,

Grigore³

et al. 2021

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A significant part of the research and production activities is represented in the field of bioengineering by the biomaterials used in hard tissue restorations. They are of great interest in dental science, intending to improve technological aspects, monitoring their biological responses to the living organisms, but also to redesign economic aspects, beginning with the choice of raw materials. In the present work, light-curing composite biomaterials were made from a composite polymer matrix consisting of specific concentrations of bisphenol A-glycidyl methacrylate base monomer (Bis-GMA), a mixture of two co-monomers, triethylene glycol dimethacrylate and ethoxylated bisphenol A-dimethacrylate (TEGDMA/BisEMA), and two alumina nanopowder concentrations (5 wt.% and 10 wt.%). These materials were mechanically tested for flexural strength and compressive strength. The structural analysis of these materials consisted of SEM microscopy and EDX elementary mapping. In order to extract 3D projections of sample surfaces, but also to produce indicative values of their roughness, the SEM micrographs were processed with open-source software. In order to observe a clear evolution of the mentioned properties, the composite biomaterials were compared with materials formed only with the Bis-GMA/TEGDMA/BisEMA composite, and with a commercial composite resin, Filtek Supreme Ultra Universal Restorative, also. The findings showed an increase in the mechanical properties of the materials manufactured concerning the concentration of nanoparticles of aluminum. EDX analyzes confirmed the good homogeneity of nanoparticles in the polymer matrix. Mechanical properties of the manufactured nanocomposite biomaterials were reported 28.8 % higher than the control biomaterial. The comparison results with the commercial resin composite are encouraging.