Effect of Nanofiller Loading on Cure Efficiency and Potential Color Change of Model Composites

Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.]
Dayane Carvalho Ramos Salles de OliveiraMario Alexandre Coelho Sinhoreti

Abstract

To evaluate the effect of nanofiller loading on cure efficiency and potential color change of experimental composites. Four different polymeric materials were produced using the same organic matrix blend. To this matrix, different amounts of 0.05 μm fumed silica filler were added: no filler, 13, 52, and 65wt%. Fourier transform infrared spectroscopy was used to evaluate the degree of conversion (DC) for each composite using near-IR analysis, and spectrophotometry according to CIELab chromatic space was used to evaluate the color change.To induce color change, composites were artificially aged with exposure to cycles of UV-B light for 300 hours. Trasmission electron microscopy was used to illustrate nanoffiler aglomeration in the resin matrix. Data were analyzed using correlation analysis (α = 0.05). There was an excellent inverse linear correlation between filler wt% and either DC or color change. Greater changes to red (+Δa) and yellow (+Δb) were observed as the filler wt% increased. A higher percentage of nano-sized filler particles in dental resin composites directly affects their cure efficiency and potential for color change. The increase in filler particle loading negatively affected monomer conversion and color stability...Continue Reading

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Citations

Sep 11, 2016·Materials Science & Engineering. C, Materials for Biological Applications·Carlos Alberto Kenji ShimokawaRichard Bengt Price
Jul 30, 2016·Dental Materials : Official Publication of the Academy of Dental Materials·Dayane Carvalho Ramos Salles de OliveiraMario Alexandre Coelho Sinhoreti
Jun 6, 2019·Brazilian Dental Journal·Jamille FavarãoMário Alexandre Coelho Sinhoreti
Oct 10, 2019·Brazilian Dental Journal·Lucas de Oliveira TomaselliMário Alexandre Coelho Sinhoreti
Jan 10, 2019·Journal of Applied Oral Science : Revista FOB·Carlos Enrique Cuevas-SuárezEliezer Zamarripa-Calderón
Nov 15, 2020·Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.]·Fei ChenHidehiko Sano
Dec 17, 2020·Clinical, Cosmetic and Investigational Dentistry·Abrar N Bin NoohFahad AlKhudhairy
May 1, 2018·Dental Materials : Official Publication of the Academy of Dental Materials·Vinícius Esteves SalgadoLarissa Maria Cavalcante

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