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The International Journal of Esthetic Dentistry

Edited by Alessandro Devigus, DMD

Official publication of the European Academy of Esthetic Dentistry, the Arabian Academy of Esthetic Dentistry, the British Academy of Aesthetic Dentistry, the Hellenic Academy of Esthetic Dentistry, the Scandinavian Academy of Esthetic Dentistry and the South African Academy of Aesthetic Dentistry

ISSN 1862-0612


Spring 2013
Volume 8 , Issue 1

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Effect of curing light distance and different mouthwashes on the sorption and solubility of a nanofilled composite

Miranda, Diego de Azevedo / Bertoldo, Carlos Eduardo dos Santos / Ambrosano, Glaucia Maria Bovi / Aguiar, Flávio Henrique Baggio / Lima, Débora Alves Nunes Leite / Lovadino, José Roberto

Pages: 88-102
PMID: 23390622

The aim of this in vitro study was to evaluate the sorption (Sp) and solubility (Sl) of a nanofilled composite (Filtek™ Z350) light-activated from the top in three curing light distances (0 mm, 3 mm and 6 mm) and immersed in three different mouthwashes (Plax Fresh Mint, Plax Alcohol Free, and Plax Whitening). Specimens (6 mm Ř and 1 mm height) were prepared (n = 5) and initially the degree of conversion (DC%) of discs was obtained by using a fourier transform infrared spectrometer. Then, the specimens were placed in a desiccator at 37°C and were weighed until a constant mass (m1) was obtained. The discs were immersed in the mouthwashes for 30 days. Twice a day, the samples were immersed in 2 ml of the mouthwashes (12 hr intervals). After the 30-day period, the discs were reweighed (m2). The reconditioning in the desiccator was done until a constant mass (m3) was obtained. The data of DC% were analyzed by analysis of variance (ANOVA) in split plots and the results showed statistical difference when photoactivated to 6 mm from the tip of the curing unit. The sorption data were submitted to two-way ANOVA and Tukey’s Test at a 5% level of significance and it was observed that a statistical difference (P < 0.05) was only cured when the distance was 6 mm, but there was no difference in sorption between mouthwashes. The solubility data were analyzed by Kruskal-Wallis’s Test (P = 0.05) and Dunn’s Test, since a non-normal data distribution was observed. The values were negative, which means that there was a mass gain, masking the real solubility.

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