title: Effect of curing light distance and different mouthwashes on the sorption and solubility of a nanofilled composite.
abstract: 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 Ø 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.
authors: Department of Restorative Dentistry, University of Campinas, Sao Paulo, Brazil. diogoodonto@yahoo.com.br
authors: Diogo
authors: D
authors: de Azevedo Miranda
authors: Carlos Eduardo
authors: CE
authors: dos Santos Bertoldo
authors: Glaucia Maria Bovi
authors: GM
authors: Ambrosano
authors: Flávio Henrique Baggio
authors: FH
authors: Aguiar
authors: Débora Alves Nunes Leite
authors: DA
authors: Lima
authors: José Roberto
authors: JR
authors: Lovadino
mesh_terms: D000042:Absorption; D000327:Adsorption; D000891:Anti-Infective Agents, Local / Q000737:chemistry; D001565:Benzoates / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry* / Q000528:radiation effects; D055117:Curing Lights, Dental; D003890:Desiccation; D006801:Humans; D007101:Immersion; D008422:Materials Testing; D009067:Mouthwashes / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry* / Q000528:radiation effects; D058105:Polymerization; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry; D012995:Solubility; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D013997:Time Factors; D014260:Triclosan / Q000737:chemistry
chemical_list: D000891:Anti-Infective Agents, Local; D001565:Benzoates; D003188:Composite Resins; D009067:Mouthwashes; C070868:Plax; C533204:filtek Z350; D012967:Sodium Dodecyl Sulfate; D014260:Triclosan