Wettability and surface morphology of eroded dentin treated with chitosan

• Published in: Archives of oral biology 2017-03, Vol.75, p.68-73
• Main Authors: Ururahy, Mirian Saavedra, Curylofo-Zotti, Fabiana Almeida, Galo, Rodrigo, Nogueira, Lucas Fabricio Bahia, Ramos, Ana Paula, Corona, Silmara Aparecida Milori
• Format: Article
• Language: English
• Subjects: Acetic Acid; Analysis of Variance; Animals; Bisphenol A-Glycidyl Methacrylate; Cattle; Chitosan; Chitosan - pharmacology; Citric Acid; Contact angle; Dental Bonding; Dentin - chemistry; Dentin - diagnostic imaging; Dentin - pathology; Dentin-Bonding Agents - chemistry; Dentistry; Eroded dentin; Incisor - drug effects; Microscopy, Electron, Scanning; Tooth Erosion - chemically induced; Tooth Erosion - diagnostic imaging; Tooth Erosion - pathology; Wettability; Wettability - drug effects
• ISSN: 0003-9969; 1879-1506
• DOI: 10.1016/j.archoralbio.2016.11.017

•Chitosan may be used to rehydrate exposed collagen matrix maintaining a more hydrophilic surface after acid etching.•Chitosan, at concentrations of 2.5% and 5.0%, did not influence of the eroded dentin wettability.•Through SEM analysis, it was found particles of chitosan deposited on the surface and within the dentinal tubules. To assess the effect of chitosan, at concentrations of 2.5% and 5.0%, on the wettability of the eroded dentin, followed by analysis of surface morphology by SEM. 104 bovine dentin slabs were ground, polished and then immersed in 20mL of citric acid (pH=3.2) under continuous stirring for 2h. Specimens were randomly divided according to the dentin substrate: sound and eroded, and then, subdivided into 4 groups (n=10): without rewetting (control), 1% acetic acid, 2.5% chitosan and 5.0% chitosan. Then, a drop of the adhesive system Single Bond 2 (3M) was deposited onto surface of each specimen. The contact angle between dentin surface and the adhesive system was measured by using a goniometer. The other 24 specimens were subjected to analysis under SEM. Statistical analysis was performed using the normality test (Kolmogorov-Smirnov) and Analysis of Variance (ANOVA) (p>0.05). No differences were found between the angles produced on the eroded dentin rewetting with chitosan at the concentrations of 2.5% and 5%. The chitosan, regardless of the concentration used, did not influence the eroded dentin wettability. Through SEM analysis, it was found particles of chitosan deposited on the surface and within the dentinal tubules.