Optimal resin monomer ratios for light-cured dental resins

Li, Weideng; Wang, Kun; Wang, Zhengzhi; Li, Bei

doi:10.1016/j.heliyon.2022.e10554

Cited by 5 publications

(1 citation statement)

References 44 publications

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“…The performance of dental composites depends on many factors, such as the structures and ratios of monomers and the type of powder used [ 18 , 19 ]. Therefore, after they are obtained, they are subjected to characterization tests and the measurement of the various parameters in order to be included in the targeted material category.…”

Section: Introductionmentioning

confidence: 99%

Polymer Mixtures for Experimental Self-Limited Dental Burs Development—A Preliminary Approach (Part 1)

Chisnoiu,

Muntean,

Păstrav

et al. 2023

JFB

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Alternative techniques have been investigated for effectiveness in caries removal because conventional metallic dental burs can lead to an excessive loss of sound tissue. The aim of the present study is to realize a preliminary approach in obtaining effective polymer mixtures for polymeric bur development, capable of removing primary dental caries using combinations of polymers to ensure the requirements for such instruments, but also a greater compatibility with the teeth structure. This study assessed the main mechanical properties, water sorption, solubility and microscopic structure of four new polymer mixture recipes to provide essential features in obtaining experimental self-limited dental burs. Two mixtures have in their composition polymer mixtures of Bis-phenol A diglycidyl ether dimethacrylate/Triethylene glycol dimethacrylate/Urethane dimethacrylates (R1, R2), and two other mixtures have Bis-phenol A diglycidyl ether dimethacrylate/Polymethyl methacrylate/Methyl methacrylates (R3, R4). The incorporation of nanoparticles into the polymer matrix has become essential due to the need of polymer biocompatibility increasing along with teeth surface remineralization, so that the powder charge was added to four recipes, such as 5% glass with BaF2 and 0.5% graphene with silver particles. All data sets were analyzed using the One-Way ANOVA test. R3, R4 showed higher compressive strength and diametrical compression values; these values increased when glass and graphene were added. Moreover, the addition of glass particles lead to an increase in flexural strength. Regarding the sorption, sample R3 had the most significant differences between day 69 and the rest of the investigation days, while the solubility varied at different intervals. From the mechanical evaluation, we could conclude that the Bis-GMA/PMMA/MMA mixtures fit the mechanical characteristics supported by polymer burs, following future studies regarding their use on the affected dentin.

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Section: Introductionmentioning

confidence: 99%

Polymer Mixtures for Experimental Self-Limited Dental Burs Development—A Preliminary Approach (Part 1)

Chisnoiu,

Muntean,

Păstrav

et al. 2023

JFB

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Enhancing glass‐ionomer cements with flake‐shaped glass: A new frontier in dental restoration

Song,

Gong,

Zhang

et al. 2024

J Biomedical Materials Res

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This study aims to investigate whether the combined use of thin sheet glass (FSG) and polyurethane acrylate (PUA) can enhance the mechanical properties and biocompatibility of glass ionomer cements (GICs) to improve the overall performance of commercial GICs. In this study, an innovative approach was employed by incorporating diluents and photoinitiators into PUA to develop a novel light‐curable PUA material. The PUA was then used to modify the GIC to obtain PUA‐modified GIC. Subsequently, physical and chemical methods were employed to corrode and chemically modify the glass fiber surface to acquire dried thin sheet glass (FSG). Different proportions of FSG (10%, 20%, and 30% by mass) were mixed with PUA‐GIC to obtain FSG‐PUA modified GIC. Mechanical and biocompatibility tests were conducted on regular GIC, PUA‐GIC, resin‐modified glass ionomer cement (RMGIC), and various proportions of FSG‐PUA‐GIC materials, including flexural strength, surface hardness, water absorption rate, solubility, shear strength, compressive strength (CS), in vitro cytotoxicity, as well as short‐term oral toxicity and subcutaneous implantation trials. A novel FSG‐PUA modified GIC was successfully prepared, which not only retained the excellent biocompatibility and fluoride ion release capacity of the original GIC but also significantly enhanced its mechanical strength and durability. The application of this innovative method provides a new direction for the development of dental restorative materials, particularly in addressing the shortcomings of GICs in terms of mechanical performance. The addition of FSG notably increased the flexural strength and surface hardness of GICs, especially at a 20% additive level, demonstrating superior performance compared with standard Fuji IX (F9) and slightly better than RMGIC. Water absorption rate and solubility initially decreased and then increased with an increase in FSG content, and significantly outperformed F9 and RMGIC at 10% and 20% additive levels. Shear strength and CS decreased with an increase in FSG content but remained superior to commercial groups. Material incubation with cells in vitro for 24–48 h showed no significant impact on cell viability, with cell viability exceeding 90%. Short‐term oral toxicity tests demonstrated good biocompatibility of the material, and subcutaneous implant trials did not observe any significant inflammation or pathological changes within 12 weeks of observation. The use of FSG‐PUA materials effectively enhances the mechanical properties of GIC materials, demonstrating excellent biocompatibility and significant potential as dental restorative materials. Among them, the 20% FSG‐PUA modified GICs exhibited significantly superior flexural strength, surface hardness, shear strength, water absorption, and solubility compared with F9 and slightly surpassing RMGIC, showcasing the best mechanical performance.

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Physicomechanical properties and polymerization shrinkage of the newly developed radiopaque flowable composite derived from rice husk

Azlisham,

Johari,

Mohamad

et al. 2024

Polymer Composites

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The study aimed to evaluate the physicomechanical properties and polymerization shrinkage of the newly developed flowable composite (FC). The physical and mechanical properties assessed include flowability, radiopacity, depth of cure, surface roughness, compressive strength, and compressive modulus. The newly developed FC was prepared by incorporating zirconia as a radiopacifying agent and nanohybrid silica derived from rice husk as fillers, with the monomer ratio of urethane dimethacrylate to triethylene glycol dimethacrylate (UDMA:TEGDMA) manipulated at 20:80, 30:70, 50:50, 60:40, 80:20, and 90:10. Filtek Supreme Ultra Flowable Restorative, Revolution Formula 2 and G‐aenial Universal Flo served as control groups. The data were statistically analyzed using one‐way ANOVA and post‐hoc Tukey tests. The newly developed FCs, with flowability levels classified as high, medium, and low‐flow, were found to be radiopaque. As the UDMA ratio in the newly developed FCs increased, depth of cure, compressive strength, and compressive modulus increased, while surface roughness and polymerization shrinkage decreased. Comparable values were observed between the newly developed FCs and control groups in flowability, surface roughness, compressive modulus, and polymerization shrinkage. In summary, the newly developed radiopaque FCs could serve as sustainable dental restorative materials by enhancing diagnostic accuracy, improving physicomechanical properties, and minimizing polymerization shrinkage.Highlights Different UDMA:TEGDMA ratios were crucial in determining the properties The three different levels of flowability were confirmed to be radiopaque Higher ratio of UDMA improved the physical and mechanical properties Higher ratio of UDMA reduced the polymerization shrinkage

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Optimal resin monomer ratios for light-cured dental resins

Cited by 5 publications

References 44 publications

Polymer Mixtures for Experimental Self-Limited Dental Burs Development—A Preliminary Approach (Part 1)

Polymer Mixtures for Experimental Self-Limited Dental Burs Development—A Preliminary Approach (Part 1)

Enhancing glass‐ionomer cements with flake‐shaped glass: A new frontier in dental restoration

Physicomechanical properties and polymerization shrinkage of the newly developed radiopaque flowable composite derived from rice husk

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