title: Effect of green tea as a protective measure against dental erosion in coronary dentine.
abstract: The aim of this study was to evaluate the effect of green tea as a protective measure on eroded dentin. Disks of human coronary dentin were selected based on surface hardness and randomly assigned to 3 groups (n = 10): DW - distilled water, CHX - 0.2% chlorhexidine digluconate, and GT - green tea. The disks were allowed to acquire pellicle for 2 hours and were then subjected to 3 cycles per day of demineralization (C6H8O7 0.05 M, pH 3.75, 60 s), treatment (DW or CHX or GT, 5 min) and remineralization (artificial saliva, 60 min) over a period of 3 days. Changes in the dentin were determined by loss of surface hardness (%SHL) and mechanical profilometry analysis at the end of each day. Data were analyzed by two-way ANOVA followed by Tukey's test for %SHL and profilometry (p < 0.05). Significant reductions in dentin hardness loss were observed only for the CHX group when compared to the DW group (p < 0.05). However, there was no significant difference between the CHX and GT groups (p > 0.05). A significant difference was observed between DW and GT treatments for wear and roughness measurements (p < 0.05). The green tea extract solution was able to reduce the wear and roughness caused by dentin erosion under the conditions of this study.
authors.affiliation: Universidade de Fortaleza, CE, Brazil.
authors.forename: Maria Denise Rodrigues
authors.initials: MD
authors.lastname: De Moraes
authors.affiliation: Faculty of Pharmacy, Dentistry and Nursing, Universidade Federal do Ceará, Fortaleza, CE, Brazil.
authors.forename: Jéssica Rodrigues Mendes
authors.initials: JR
authors.lastname: Carneiro
authors.affiliation: Universidade de Fortaleza, CE, Brazil.
authors.forename: Vanara Florêncio
authors.initials: VF
authors.lastname: Passos
authors.affiliation: Faculty of Pharmacy, Dentistry and Nursing, Universidade Federal do Ceará, Fortaleza, CE, Brazil.
authors.forename: Sérgio Lima
authors.initials: SL
authors.lastname: Santiago
mesh_terms: D000704:Analysis of Variance; D002710:Chlorhexidine / Q000031:analogs & derivatives / Q000737:chemistry; D003804:Dentin / Q000187:drug effects*; D006244:Hardness; D006801:Humans; D020782:Matrix Metalloproteinases / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry; D020011:Protective Agents / Q000737:chemistry*; D011897:Random Allocation; D015203:Reproducibility of Results; D012464:Saliva, Artificial / Q000737:chemistry; D018709:Statistics, Nonparametric; D013499:Surface Properties / Q000187:drug effects; D013662:Tea / Q000737:chemistry*; D013997:Time Factors; D014077:Tooth Erosion / Q000517:prevention & control*; D014867:Water / Q000737:chemistry
chemical_list: D010936:Plant Extracts; D020011:Protective Agents; D012464:Saliva, Artificial; D013662:Tea; D014867:Water; D020782:Matrix Metalloproteinases; C010882:chlorhexidine gluconate; D002710:Chlorhexidine