scholarly journals The Influence of Popular Beverages on Mechanical Properties of Composite Resins

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3097
Author(s):  
Leszek Szalewski ◽  
Dorota Wójcik ◽  
Marcin Bogucki ◽  
Jacek Szkutnik ◽  
Ingrid Różyło-Kalinowska
Keyword(s):  
Mechanical Properties ◽  
Flexural Strength ◽  
Vickers Microhardness ◽  
Dental Treatment ◽  
Composite Resins ◽  
Dental Composite ◽  
Strength Testing ◽  
Distilled Water ◽  
Dental Composite Resins ◽  
The Mean

Currently, composite resins are used in many restorative procedures. Previous studies showed that drinking beverages may affect the mechanical properties such as microhardness or flexural strength of dental composite resins. The aim of the present study was to investigate the influence of common beverages on the mechanical properties of composite resins. Samples of the materials were prepared according to the ISO 4049:2010 standard and producer’s recommendations. The samples were next conditioned in tested fluids: distilled water, sparkling water, Coca-Cola, Red Bull and orange juice for 7 days. Vickers microhardness and flexural strength testing was performed after 7 days. Performed statistic tests confirmed the significance of microhardness changes of the tested materials in terms of both different conditioning of the samples and different composite materials. The mean flexural strength of composites was highest in distilled water and it was reduced after one week in different beverages. We conclude that all tested beverages influenced on Vickers microhardness of tested composite resins. Flexural strength only in one material was statistically significantly influenced by tested beverages. The results of this study should be taken into consideration by a dentist preparing recommendations for the patients after dental treatment with usage of composite material or after cementing composite based fixed dentures.

Effect of Nanoparticles on Physico-Mechanical Properties of Flowable Dental Composite Resins

2019 ◽  
Vol 11 (7) ◽  
pp. 986-993
Author(s):  
Mohammed Al Jafary ◽  
Mohamed Ibrahim Hashem ◽  
Majdah A. Al Khadhari ◽  
Sara Abdullah Alshammmery ◽  
Mansour K. Assery
Keyword(s):  
Mechanical Properties ◽  
Composite Resins ◽  
Dental Composite ◽  
Dental Composite Resins

scholarly journals Physical properties of two bis-acryl interim materials: color stability, flexural strength and shear bond strength to flowable composite resin as add-on material

2017 ◽  
Vol 16 ◽  
pp. 1-8 ◽  
Author(s):  
Leonardo Fernandes da Cunha ◽  
Ana Beatriz Franco Fernandes ◽  
Amanda Mahammad Mushashe ◽  
Gisele Maria Correr ◽  
Carla Castiglia Gonzaga
Keyword(s):  
Mechanical Properties ◽  
Flexural Strength ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Color Stability ◽  
Composite Resins ◽  
Bending Test ◽  
Distilled Water ◽  
Flowable Composite

The objective of this study was to evaluate the mechanical properties of two bis-acryl interim resin materials, such as color stability, flexural strength and shear bond strength to flowable composite resin, simulating clinical situations when this material has to be used for repair as add-on. Two shades of two bis-acryl interim resin materials [Structur 2 SC (shades Bleach and A2); Protemp 4 (shades A1 and A2)] were evaluated. Discs (5 x 1 mm) were fabricated and baseline color was determined after 1 h. Ten specimens were immersed at 37oC in solutions of distilled water (control) and cola-based soft drink (Coca-Cola). Color measurements were performed with a spectrophotometer using CIELab parameters. Color readings were again measured after 2 hours, 4 hours, 24 hours and 7 days. Flexural strength was determined using the three-point bending test (10 x 1 x 2 mm) on a universal testing machine (0.5 mm/min) (n = 10). Discs of bis-acryl resin were embedded in acrylic resin, planned and distributed in 2 groups: G1 - Filtek Z350 Flow/Protemp4 and G2 - Grandio SO Flow/Structure 3 (n = 15). Cylinders (3.5 x 2 mm) were made with the flowable composite resins and polymerized for 20 s. The specimens were stored in distilled water at 37oC for 24 h and subjected to shear bond strength test. Data were analyzed using one-way ANOVA and Tukey’s test ( = 0.05). ΔE values were higher for Structur Bleach (3.08)a compared with Protemp 4 (shade A1, 2.22)b (shade A2, 2.25)b. There were no significant differences between Structur Bleach and Structur A2 (2.62)ab. Coca-Cola presented higher ΔE values (3.08)a than (2.00)b. Regarding time, ΔE values increased from 1.84a after 2 h to 2.31b after 4 h. The higher values were observed after 24 h and 7 days (2.93c and 3.09d, respectively). No significant differences were observed for the flexural strength of Structur (22.05 MPa)a and Protemp 4 (19.01 MPa)a. The repairs executed with Structur/Grandio flow (9.21 MPa)a were similar to those performed with Protemp 4/Z350XT flow (10.71 MPa)a. It can be concluded that the two bis-acyl resins evaluated showed similar physical and mechanical properties.

The Improvement of Dental Composite Properties with Electromagnetically Aligned Nanofiber

2014 ◽  
Vol 1685 ◽  
Author(s):  
Tansel Uyar ◽  
Dilek Cokeliler
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Flexural Strength ◽  
Composite Resins ◽  
Dental Composite ◽  
Bending Test ◽  
Dental Composites ◽  
Layer By Layer ◽  
Aligned Fibers ◽  
Electrode Systems

ABSTRACTBecause of the aesthetics, handy and low cost features, acrylic resin is the main material in denture fabrication last 40 years. The purpose of this study is to improve mechanical properties of acrylic based dental composites used in dentistry by applying nanofiber approaches. Polymethylmethacrylate (PMMA) is commonly used as a base acrylic denture material with benefits of rapid and easy handling but sometime this material can be fractured or cracked in clinical use because of the strength issues that is frequently used in restorative dentistry in recent years. A wide variety of fillers that are used to produce PMMA composites draw the attention in literature. Using PMMA composite resins with electrospun polyvinylalcohol (PVA) nanofiber fillers is our first novelty. Also the producing and using aligned electrospun fibers as a filler is our second novelty of this practice. PVA was selected as composite filler because of biocompatibility and preparing easily also has non-toxic solvent. Electrospinning system is manufactured that allows manipulation of electric field used in the application of alignment in lab scale. Various auxillary electrode systems are used for different patterns of alignment with the manufactured device and electrode systems produce fibers in different range of diameter. Scanning electron microscopy (SEM) is used for physical characterization and determined the range of fiber diameters. After the optimization of concentration step non-woven and aligned fibers are also analyzed. Non-woven fiber has no unique pattern because of the nature of electrospinning but aligned fibers has crossed lines. These produced fibers structured as layer-by-layer form with different features are used in producing PMMA dental composites with different volume ratios. In the last part of the research, PMMA dental composites are produced with aligned and formless fibers that are characterized with three-point bending test. The maximum flexural strength figure shows that fiber load by weight %0.25 and above improves the maximum. The change of flexural strength, elastic modulus values and toughness are obtained and compared with formless and aligned PVA nanofiber included composite specimens. As a result, mechanical properties of PMMA dental composites are improved with using PVA nanofibers as a filler also with the usage of aligned fibers instead of the formless ones the effects of improvement gets better with maximum values as 5.1 MPa (flexural strength), 0.8 GPa (elastic modulus), 170kJ/m3 (toughness).

Synthesis of Nanodiamond Reinforced Dental Composite Resins and Their Mechanical Properties

2012 ◽  
Vol 20 (4-7) ◽  
pp. 628-632 ◽  
Author(s):  
Y. Q. Chu ◽  
Y. Tong ◽  
T. L. Zhang ◽  
F. L. Huang ◽  
X. Z. Wang
Keyword(s):  
Mechanical Properties ◽  
Composite Resins ◽  
Dental Composite ◽  
Dental Composite Resins

Static and cyclic flexural strength of various dental composite resins

2016 ◽  
Vol 32 ◽  
pp. e37-e38 ◽  
Author(s):  
Y.W. Im ◽  
S.H. Lee ◽  
J.W. Lee ◽  
H.H. Lee
Keyword(s):  
Flexural Strength ◽  
Composite Resins ◽  
Dental Composite ◽  
Dental Composite Resins

Interactions Between Dental Composite Resins and Saliva A comparative biochemical in vitro study

2019 ◽  
Vol 56 (3) ◽  
pp. 529-533
Author(s):  
Mihaela Pantea ◽  
Diana Andreea Ighigeanu ◽  
Alexandra Totan ◽  
Maria Greabu ◽  
Daniela Miricescu ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
In Vitro Study ◽  
Composite Resins ◽  
Vitro Study ◽  
Dental Composite ◽  
Gamma Glutamyl Transferase ◽  
Specific Protocol ◽  
Dental Composite Resins ◽  
Glutamyl Transferase

This in vitro study analyses the biochemical interaction between saliva and three types of dental composite resins (a direct resin, an indirect resin and a dual-cure resin used for cementation of indirect dental restorations). The resin samples were obtained following a specific protocol and in line with the producers� recommendations; the resin samples were incubated with saliva samples collected from 19 healthy volunteers. The obtained results showed that the tested composite resins did not produce significant changes in oxidative stress parameters that were analysed (albumin, uric acid, GGT / gamma glutamyl transferase, OXSR-1 / oxidative stress responsive kinase 1) and do not influence the inflammatory salivary status reflected by the levels of IL-6 - an inflammatory marker.

The Fracture Toughness Characteristics of Three Dental Composite Resins

1991 ◽  
Vol 1 (4) ◽  
pp. 223-231
Author(s):  
Y. Higo ◽  
D. Damri ◽  
S. Nunomura ◽  
K. Kumada ◽  
N. Sawa ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Composite Resins ◽  
Dental Composite ◽  
Dental Composite Resins
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