التفاصيل البيبلوغرافية
| العنوان: |
Light curing and ratio of glass/fumed silica fillers on degree of conversion and mechanical properties of experimental composite resins. |
| المؤلفون: |
Silva Prezotto, A. F., Silva, D. B., Vitti, R. P., Sinhoreti, M. A. C., Brandt, W. C. |
| المصدر: |
Journal of Applied Polymer Science; 2/15/2019, Vol. 136 Issue 7, pN.PAG-N.PAG, 1p |
| مصطلحات موضوعية: |
LIGHT curves, FUSED silica, GUMS & resins, CHEMICAL energy conversion, SILICA fume, FILLER materials, MECHANICAL behavior of materials, MONOMERS |
| مستخلص: |
This study evaluated the degree of conversion and mechanical properties of experimental composite resins made with different fillers and light‐curing methods. All composites had the same organic matrix (40% wt) and photoinitiator system (1.2% wt). Experimental composite groups were divided according to ratio (%) of silanated ground glass (0.5 μm) (BaAlSi) and fumed silica (SiO2): 100/0, 90/10, 80/20, and 70/30. Light‐emitting diode light was used in the continuous, soft‐start, and pulse‐delay modes (n = 10). Degree of conversion was determined using attenuated total reflectance–Fourier transform infrared spectroscopy. Flexural strength and modulus were obtained using a universal testing machine, and Knoop microhardness was measured in a Knoop indenter. The data were subjected to a two‐way ANOVA and Tukey's post hoc test (α = 0.05). Continuous‐light exposure of the 100/0 group produced the highest degrees of conversion. Soft‐start exposure of the 70/30 groups produced the highest Knoop microhardness. The pulse‐delay method produced the lowest flexural strength and modulus values. The 100/0 and 70/30 groups had the lowest flexural strength and flexural modulus, respectively. Application of continuous‐light output with composite resins containing a ratio of 80/20 (BaAlSi/SiO2) fillers generated the best results regarding the degree of conversion and mechanical properties. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47008. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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