Compressive Strength of Composite Resins at Different Exposure Time Using LED and Halogen Units

Aleem, Hasham; Ameen, Faiza; Rehman, Abdur

doi:10.25301/jpda.271.22

Cited by 5 publications

(7 citation statements)

References 19 publications

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“…For confirmation, these colonies were streaked on blood agar plates and were isolated after incubation. For the microcosm model, an inoculum was prepared by the saliva sample dilution with sterile glycerol of 30% in concentration [ 28 ].…”

Section: Methodsmentioning

confidence: 99%

Antibacterial Activity of Dental Composite with Ciprofloxacin Loaded Silver Nanoparticles

et al. 2022

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Resin composites have been widely used in dental restoration. However, polymerization shrinkage and resultant bacterial microleakage are major limitations that may lead to secondary caries. To overcome this, a new type of antibacterial resin composite containing ciprofloxacin-loaded silver nanoparticles (CIP-AgNPs) were synthesized. The chemical reduction approach successfully produced CIP-AgNPs, as demonstrated by FTIR, zeta potential, scanning electron microscopy, and ultraviolet-visible (UV-vis) spectroscopy. CIP-AgNPs were added to resin composites and the antibacterial activity of the dental composite discs were realized against Enterococcus faecalis, Streptococcus mutans, and the Saliva microcosm. The biocompatibility of modified resin composites was assessed and mechanical testing of modified dental composites was also performed. The results indicated that the antibacterial activity and compressive strength of resin composites containing CIP-AgNPs were enhanced compared to the control group. They were also biocompatible when compared to resin composites containing AgNPs. In short, these results established strong ground application for CIP-AgNP-modified dental composite resins.

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Section: Methodsmentioning

confidence: 99%

Antibacterial Activity of Dental Composite with Ciprofloxacin Loaded Silver Nanoparticles

et al. 2022

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“…Considering that to perform the proposed simulations, the physicalmechanical properties of the composite materials used, namely density, Young's modulus of elasticity, and Poisson's ratio, were required. Specialty mentions in the literature mention the following values highlighted as shown in Table 2, which were used for the present study [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52]. Due to the fact that, in the specialized literature, very little data were found about the densities of the composites used, they were measured using the techniques described as follows.…”

Section: Methodsmentioning

confidence: 99%

Study on the Restoration of Class II Carious Cavities by Virtual Methods: Simulation of Mechanical Behavior

Ţuculină

Staicu

Munteanu

et al. 2023

JFB

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The restoration of class II cavities is predominantly carried out with composite materials. Due to the high failure rate in restoring this type of cavity, composite materials with much-improved properties and new application techniques have been promoted. The study aimed to analyze the mechanical behavior of several topical composite materials (nanocomposites, nanohybrids and ormocer) using different application techniques. In a lower second molar, a class II occlusal cavity was prepared. As filling materials, we used the following combinations: Admira Fusion and Admira Fusion Flow, Grandio and Grandio Flow, Filtek Supreme XT and Filtek Supreme Flow. These were applied using a snow plow, injection molded and Bichacho techniques. Three-dimensional scanning of the molar with the prepared cavity was performed, and then scanning of each layer of added composite material was performed, obtaining three-dimensional models. The virtual molar models were analyzed with software specific to the finite element analysis method, where their physical-mechanical properties were entered and assigned to the components of the virtual molar. Simulations at high forces specific to bruxism were then carried out and analyzed, and compared. The values of displacements and strain, for all six analyzed situations, are relatively small (range from 5.25 × 10−6–3.21 × 10−5 for displacement, 6.22 × 10−3–4.34 × 10−3 for strain), which validates all three methods and the materials used. As far as the stress values are concerned, they are similar for all methods (250–300 MPa), except for the snow plow and injection-molded techniques using Grandio and Grandio Flow composites, where the maximum von Mises stress value was more than double (approximately 700 MPa). When using the combination of Grandio and Grandio Flow materials, the 1 mm thickness of the fluid composite layer was found to have a major influence on occlusal forces damping as opposed to 0.5 mm. Therefore, the Bichacho technique is indicated at the expense of the snow plow and injection-molded techniques. The composite materials used by us in this study are state-of-the-art, with clear indications for restoring cavities resulting from the treatment of carious lesions. However, their association and application technique in the case of Class II cavities is of clinical importance for resistance to masticatory forces.

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“…A universal testing machine (Instron universal testing machine model static) at a crosshead speed of 0.5 cm/min and load cell of load cell 5 KN were used to measure the compressive strength. Specimens were placed horizontally on the machine’s base, and the compressive load was applied until fracture [ 31 ]. The unit of measured strength was MPa, and the Compressive strength (CS) was calculated by using this formula:

…”

Section: Methodsmentioning

confidence: 99%

Effectiveness of Se/ZnO NPs in Enhancing the Antibacterial Activity of Resin-Based Dental Composites

et al. 2022

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Biofilm formation in the resin-composite interface is a major challenge for resin-based dental composites. Using doped z nanoparticles (NPs) to enhance the antibacterial properties of resin composites can be an effective approach to prevent this. The present study focused on the effectiveness of Selenium-doped ZnO (Se/ZnO) NPs as an antibacterial nanofiller in resin composites and their impact on their mechanical properties. Pristine and Se/ZnO NPs were synthesized by the mechanochemical method and confirmed through UV-Vis Spectroscopy, FTIR (Fourier Transform Infrared) analysis, X-ray Diffraction (XRD) crystallography, Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), and Zeta analysis. The resin composites were then modified by varying concentrations of pristine and Se/ZnO NPs. A single species (S. mutans and E. faecalis) and a saliva microcosm model were utilized for antibacterial analysis. Hemolytic assay and compressive strength tests were also performed to test the modified composite resin’s cytotoxicity and mechanical strength. When incorporated into composite resin, 1% Se/ZnO NPs showed higher antibacterial activity, biocompatibility, and higher mechanical strength when compared to composites with 1% ZnO NPs. The Se/ZnO NPs has been explored for the first time as an efficient antibacterial nanofiller for resin composites and showed effectiveness at lower concentrations, and hence can be an effective candidate in preventing secondary caries by limiting biofilm formation.

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Compressive Strength of Composite Resins at Different Exposure Time Using LED and Halogen Units

Cited by 5 publications

References 19 publications

Antibacterial Activity of Dental Composite with Ciprofloxacin Loaded Silver Nanoparticles

Antibacterial Activity of Dental Composite with Ciprofloxacin Loaded Silver Nanoparticles

Study on the Restoration of Class II Carious Cavities by Virtual Methods: Simulation of Mechanical Behavior

Effectiveness of Se/ZnO NPs in Enhancing the Antibacterial Activity of Resin-Based Dental Composites

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