title: [Binding ability of fluoride-resistant strains of S. mutans and S. sobrinus in vitro].
abstract: OBJECTIVE
  To investigate the binding ability of S.mutans and S.sobrinus after their fluoride-resistant mutation.
  
  
  METHODS
  The binding amount and binding percentage of S.mutans, S.sobrinus and their F-resistant strains to saliva-coated hydroxyapatite(SHA)were measured and compared by(3)H-labeled binding assay.
  
  
  RESULTS
  The binding percentages of F-resistant and their parent strains had few difference(P>0.05) whereas the binding percentage of S.sobrinus was significantly lower than S.mutans (P<0.01).
  
  
  CONCLUSIONS
  The data showed that the binding ability to SHA between F-resistant and F-sensitive S.mutans had no significant difference which indicated that the emerge of F-resistant strains could not reduce the cariogenicity of S.mutans and S.sobrinus.
authors.affiliation: Department of Stomatology, Ninth People's Hospital, Shanghai Second Medical University, Shanghai 200011, China.
authors.forename: J Y
authors.initials: JY
authors.lastname: Sheng
authors.forename: Z
authors.initials: Z
authors.lastname: Liu