Toughening and polymerization stress control in composites using thiourethane-treated fillers
نویسندگان
چکیده
Abstract Filler particle functionalization with thiourethane oligomers has been shown to increase fracture toughness and decrease polymerization stress in dental composites, though the mechanism is poorly understood. The aim of this study was systematically characterize effect type filler surface on physicochemical properties experimental resin composites containing fillers different size volume fraction. Barium glass (1, 3 10 µm) were functionalized 2 wt% thiourethane-silane (TU-Sil) synthesized de novo characterized by thermogravimetric analysis. Fillers treated 3-(Trimethoxysilyl)propyl methacrylate (MA-Sil) no treatment (No-Sil) served as controls. (50, 60 70 wt%) incorporated into BisGMA-UDMA-TEGDMA (5:3:2) camphorquinone/ethyl-4-dimethylaminobenzoate (0.2/0.8 0.2 di-tert-butyl hydroxytoluene. particles analysis a representative group tagged methacrylated rhodamine B analyzed confocal laser scanning microscopy. Polymerization kinetics assessed near-IR spectroscopy. tested cantilever system, single edge-notched beams. Fracture surfaces SEM. Data ANOVA/Tukey's test (α = 0.05). grafting oligomer onto led reductions ranging between 41 54%, without affecting viscosity composite. increased average 35% for compared traditional methacrylate-silanized groups. SEM analyses demonstrate that coverage not homogeneous varied filler. silane layer 1 µm 206 nm, much thicker than reported silanes. In summary, established structure–property relationships silane-containing materials. results significant increases are obtained judiciously tailoring organic–inorganic interface composites.
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ژورنال
عنوان ژورنال: Scientific Reports
سال: 2021
ISSN: ['2045-2322']
DOI: https://doi.org/10.1038/s41598-021-87151-9