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  • Title: Effect of a sugarcane cystatin on the profile and viability of microcosm biofilm and on dentin demineralization.
    Author: Frazão Câmara JV, Araujo TT, Mendez DAC, da Silva NDG, de Medeiros FF, Santos LA, de Souza Carvalho T, Reis FN, Martini T, Moraes SM, Shibao PYT, Groisman S, Magalhães AC, Henrique-Silva F, Buzalaf MAR.
    Journal: Arch Microbiol; 2021 Sep; 203(7):4133-4139. PubMed ID: 34059945.
    Abstract:
    To analyze the effect of a sugarcane cystatin (CaneCPI-5) on the microbial profile and viability, as well as on the prevention of dentin demineralization using a microcosm biofilm model. Ninety bovine dentine specimens were divided into five experimental groups according with the solution they were treated for 60 s: (1) PBS (negative control), (2) 0.12% chlorhexidine (positive control), (3) Fluoride (500 ppm F, as NaF), (4) 0.025 mg/ml CaneCPI-5, and (5) 0.05 mg/ml CaneCPI-5. Specimens were incubated with inoculum (McBain's saliva plus human saliva) in the first 8 h, and from then on, they were exposed to McBain saliva containing sucrose and daily treated (60 s) with the solutions for 5 days. Resazurin and colony-forming unit counting assays were performed. Dentin demineralization was measured by transverse micro-radiography (TMR). 0.12% chlorhexidine significantly reduced the metabolic activity of the microcosm biofilm in relation to the negative control and treated groups (p < 0.01). CHX and F significantly reduced the counts of total microorganisms, mutans group streptococci, and lactobacilli when compared with the negative control. None of the treatments was able to significantly reduce dentin demineralization in comparison with the negative control. In the model evaluated, CaneCPI-5 neither altered the microcosm biofilm profile and viability nor protected dentin against demineralization.
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