2 documents found, page 1 of 1
Calcium binding to S. mutans grown in the presence or absence of sucrose
Leitão,Tarcísio Jorge; Tenuta,Livia Maria Andaló; Ishi,Guilherme; Cury,Jaime AparecidoSucrose is the most cariogenic dietary carbohydrate because it is a substrate for insoluble extracellular polysaccharide (IEPS) production in dental biofilms, which can proportionally decrease bacterial density and, consequently, the number of biofilm calcium (Ca) binding sites. Ca bound to bacterial cell walls can be released into the biofilm fluid during a cariogenic challenge, reducing the driving force for ...
The effect of iron on Streptococcus mutans biofilm and on enamel demineralization
Ribeiro,Cecília Cláudia Costa; Ccahuana-Vásquez,Renzo Alberto; Carmo,Cadidja Dayane Sousa do; Alves,Cláudia Maria Coêlho; Leitão,Tarcísio JorgeIron (Fe) may have an anticaries effect by specific inhibition of glycosyltransferase (GTF) enzymes of Streptococcus mutans, but this hypothesis has not yet been clarified. In this study, S. mutans biofilms were formed on blocks of bovine dental enamel of a predetermined surface hardness (SH). These biofilms were exposed eight times/day to 10% sucrose, and two times/day they were subjected to one of the followi...