title: [Effects of different beverages on plaque pH of different caries-sensitive children].
abstract: OBJECTIVE
  To compare the impacts of different beverages on plaque pH of caries-sensitive and caries-free children and to evaluate the applicability of in situ pH measurements in human dental plaque using Beetrode microelectrode.
  
  
  METHODS
  The subjective population consisted of 20 children (aged 3-5 years). Ten of them were caries-free(dmft = 0); the other were caries-active (dmft > 4). The dental plaque pH were measured in situ with a pH microelectrode within 1 h after drinking three different beverages respectively. Then the resting pH value (pHrest), minimum pH value (pHmin), the range of the pH (deltapH) was analyzed by ANOVA. Results There was a significant difference in pHrest between caries-free and caries-sensitive children. All the pH responses in the plaque following drinking three different beverages showed a classic Stephan-type response. The differences of the pHmin, deltapH in sound sites were no statistic significance (P > 0.05) after drinking beverages in caries-free children. However the changes in the caries-sensitive group were more pronounced than the non-caries group. There were significant differences on the pHmin, deltapH among different beverages (P < 0.05).
  
  
  CONCLUSIONS
  The cariogenicity of plaque in caries-active children was stronger than that of the caries-free group. Different beverages have different potential cariogenicity.
authors.affiliation: Key Laboratory of Oral Biomedical Engineering, Ministry of Education, Sichuan University, Chengdu 610041, China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Liu
authors.forename: Jing
authors.initials: J
authors.lastname: Zou
authors.forename: Ran
authors.initials: R
authors.lastname: Shang
mesh_terms: D001628:Beverages; D002648:Child; D003731:Dental Caries; D003773:Dental Plaque; D006801:Humans; D006863:Hydrogen-Ion Concentration