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- W4313461024 abstract "Objective: Evaluate the mechanical properties of experimental adhesive models with different photoinitiators(PI) polymerized by LED units of different power densities. Material and Methods: Three groups of adhesivemodels based on HEMA/BisGMA (45/55) were prepared in association with different PI combinations: G2(control) – 2 PI: 0.5% CQ, 0.5% EDMAB; G3 - 3 PI: 0.5% CQ; 0.5% DMAEMA, 0.5% DPIHP; G4 - 4 PI: 0.5%CQ; 0.5% EDMAB; 0.5% DMAEMA; 0.5% DPIHP. The three formulations were polymerized at two differentLED power densities: 550 mW/cm2 and 1200 mW/cm2. The degree of conversion (DC) of adhesive monomerswas monitored in situ through the FTIR for 600 s. Specimens were prepared for each formulation for analysis offlexural strength (FS), modulus of elasticity (ME), sorption (SOR) and solubility (SOL). Data were submitted totwo-way ANOVA and Tukey tests (5%). Results: DC: there is a significant difference among adhesive systems(G2<G3<G4). FS and ME: significant differences were found between densities, with the lowest average for550 mW/cm2. SOR and SOL: adhesives polymerized at 1200 mW/cm2 presented higher sorption and solubility.Conclusion: The mechanical properties of the adhesive models are directly related to the types of photoinitiatiorsand the LED power densities. KEYWORDSDental adhesive; Irradiance; Light-curing; Photoinitiators; Physicochemical phenomena." @default.
- W4313461024 created "2023-01-06" @default.
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- W4313461024 date "2023-01-01" @default.
- W4313461024 modified "2023-10-01" @default.
- W4313461024 title "Impact of photoinitiator quality on chemical-mechanical properties of dental adhesives under different light intensities" @default.
- W4313461024 doi "https://doi.org/10.4322/bds.2022.e3704" @default.
- W4313461024 hasPublicationYear "2023" @default.
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