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Bis-EMA/Bis-GMA ratio effects on resin-properties and impregnated fiber-bundles.
- Source :
-
Dental materials : official publication of the Academy of Dental Materials [Dent Mater] 2024 Oct; Vol. 40 (10), pp. 1652-1657. Date of Electronic Publication: 2024 Jul 31. - Publication Year :
- 2024
-
Abstract
- Objectives: To evaluate the effect of different ratios of Bis-EMA/Bis-GMA resin mixtures on the inherent viscosity and curing-related properties: including degree of cure (DC%), shrinkage strain, Knoop micro-hardness (KH) and flexural strength of resin-impregnated fiber-bundles.<br />Methods: Bis-EMA/Bis-GMA monomers were mixed (by weight) in the following ratios: M1 = 30 %/70 %, M2 = 50 %/50 %, M3 = 70 %/30 %, and M4 = 100 %/0 %. Standard measurements were made of refractive index, viscosity, degree of conversion, shrinkage strain and Knoop hardness (KHN). For 60 % glass fiber-bundles impregnated with 40 % resin, three-point bending test for flexural strength and shrinkage strain were measured. Data were analyzed by One-way ANOVA and Bonferroni post-hoc tests (α = 0.05).<br />Results: For resin mixtures, increasing Bis-EMA proportion decreased refractive index (p < 0.05), and viscosity (p < 0.05), and increased monomer conversion (DC%), shrinkage strain and KHN (p < 0.05). DC% increased after 1 h for all resin mixtures. The shrinkage strain and flexural strength of resin-impregnated fiber-bundles reduced with increased Bis-EMA.<br />Significance: Monomeric mixtures with highest amounts of Bis-EMA showed enhancement in several clinically-relevant properties and polymerization of respective resin-impregnated glass fibers. This makes them potential candidates for impregnating glass fibers in fiber-reinforced restorations.<br />Competing Interests: Declaration of competing interest This is to confirm there are no interests to declare regarding the above titled manuscript.<br /> (Copyright © 2024 Elsevier Inc. All rights reserved.)
- Subjects :
- Viscosity
Flexural Strength
Composite Resins chemistry
Polymethacrylic Acids chemistry
Methacrylates chemistry
Polymerization
Dental Stress Analysis
Refractometry
Dental Materials chemistry
Surface Properties
Materials Testing
Bisphenol A-Glycidyl Methacrylate chemistry
Glass chemistry
Hardness
Subjects
Details
- Language :
- English
- ISSN :
- 1879-0097
- Volume :
- 40
- Issue :
- 10
- Database :
- MEDLINE
- Journal :
- Dental materials : official publication of the Academy of Dental Materials
- Publication Type :
- Academic Journal
- Accession number :
- 39084956
- Full Text :
- https://doi.org/10.1016/j.dental.2024.07.001