title: The effect of mouthrinses on salivary sorption, solubility and surface degradation of a nanofilled and a hybrid resin composite.
abstract: This in vitro study evaluated the effect of mouth rinses on salivary sorption (Sp), solubility (Sl) and surface degradation of a nanofilled (Z350) and hybrid (P60) resin composite. Specimens (6 mm in diameter and 1 mm thick) of a nanofilled and hybrid resin composite were immersed in artificial saliva at 37 degrees C for seven days. Twice a day, the samples (n = 5) were immersed in 20 ml of three mouth rinses: Listerine, Plax Mint and Plax. A control group was maintained in artificial saliva. Sp and Sl were evaluated based on ISO 4049:2000(E) and surface degradation by scanning electron microscopy-SEM. The degree of conversion (DC%) of resin composites was obtained by using an FT-IR spectrometer equipped with an attenuated total reflectance crystal (ATR). The data were analyzed using the Student's t-test, ANOVA and Tukey test for multiple comparisons. No significant difference in DC% was found between the two resin composites (p < 0.05). The highest sorption rate was presented by the nanofilled composite exposed to Listerine (p < 0.05). The hybrid composite in the control group (artificial saliva) and Plax presented the lowest sorption (p < 0.05). The highest solubility was presented by the two resin composites exposed to Listerine (p < 0.05). SEM analysis showed that mouth rinses produced more severe surface degradation in the nanofilled composite.
authors.affiliation: Department of Restorative Dentistry, School of Dentistry, Federal Fluminense University, Campus Valonguinho, Niterói, RJ, Brazil.
authors.forename: Giselle Soares
authors.initials: GS
authors.lastname: Almeida
authors.forename: Laiza Tatiana
authors.initials: LT
authors.lastname: Poskus
authors.forename: José Guilherme Antunes
authors.initials: JG
authors.lastname: Guimarães
authors.forename: Eduardo Moreira
authors.initials: EM
authors.lastname: da Silva
mesh_terms: D000042:Absorption; D000327:Adsorption; D000891:Anti-Infective Agents, Local / Q000737:chemistry; D001565:Benzoates / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D003764:Dental Materials / Q000737:chemistry*; D004338:Drug Combinations; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D009067:Mouthwashes / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D012459:Salicylates / Q000737:chemistry; D012464:Saliva, Artificial / Q000737:chemistry*; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry; D012995:Solubility; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D013696:Temperature; D013729:Terpenes / Q000737:chemistry; D013997:Time Factors; D014260:Triclosan / Q000737:chemistry
chemical_list: D000891:Anti-Infective Agents, Local; D001565:Benzoates; D003188:Composite Resins; D003764:Dental Materials; D004338:Drug Combinations; C438835:Filtek P60 Composite Resin; D009067:Mouthwashes; C070868:Plax; D011108:Polymers; D012459:Salicylates; D012464:Saliva, Artificial; D013729:Terpenes; C533204:filtek Z350; D012967:Sodium Dodecyl Sulfate; D014260:Triclosan; C057473:Listerine