Buffering effects of plaque solid, Streptococcus mutans and glucans.
- Author:
Lin YUE
1
;
Xu-dong BAO
;
Xue-jun GAO
Author Information
- Publication Type:Journal Article
- MeSH: Acids; Adolescent; Adult; Colony Count, Microbial; Dental Caries Susceptibility; Dental Plaque; microbiology; physiopathology; Female; Glucans; metabolism; Humans; Male; Streptococcus mutans; metabolism; Young Adult
- From: Chinese Journal of Stomatology 2006;41(5):263-265
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo investigate the buffer capacity of insoluble plaque mass including bacteria and glucans matrix.
METHODSPlaque samples (starved or incubated 1 h with 10% sucrose), Streptococcus mutans (S. mutans) mass, and insoluble/soluble glucans were titrated with 1 mmol/L HCl. Meanwhile, the density of bacteria was counted and related to buffer capacity.
RESULTSThe bacteria density had significant effects on acid buffer capacity in dental plaque, but the effect reduced with consuming sugar. S. mutans mass with no sucrose incubating contributed to the buffer capacity of (0.609 +/- 0.202) mmol/L, and S. mutans mass with 2% sucrose had only the buffer capacity of (0.099 +/- 0.047) mmol/L. In the mean time, glucans had no effect on acid buffering (0.028 - 0.032 mmol/L).
CONCLUSIONSThe bacteria including S. mutans may be the main contributor to acid buffering in plaque solid.