title: [Regulation of adherence to serum-coated hydroxyapatite by Streptococcus sanguis].
abstract: OBJECTIVE
  To investigate the effects of pH and calcium iron on adhesion of Streptococcus sanguis to serum-coated hydroxyapatite.
  
  
  METHODS
  The adhesion model in vitro established by Clark W. B. in 1977 was used to quantify adsorptive cells through [3H] thymidine labelling.
  
  
  RESULTS
  The cpm values between different pH groups showed significant differences. Also, there were significant differences of cpm values between calcium groups and control group.
  
  
  CONCLUSIONS
  Either pH or calcium iron has obvious effect on adherence of Stroptococcus sanguis to serum-coated hydroxyapatite. The findings suggest that regulating pH and concentration of calcium iron can help to change colonization on teeth surfaces by Streptococcus sanguis in periodontal circumstance.
authors.affiliation: Institute for Microecology, Dalian Medical University, Dalian 116027.
authors.forename: X
authors.initials: X
authors.lastname: Song
authors.forename: Y
authors.initials: Y
authors.lastname: Pan
authors.forename: Q
authors.initials: Q
authors.lastname: Kong
mesh_terms: D000818:Animals; D001422:Bacterial Adhesion / Q000187:drug effects / Q000502:physiology*; D002118:Calcium / Q000494:pharmacology; D002417:Cattle; D004305:Dose-Response Relationship, Drug; D006863:Hydrogen-Ion Concentration; D006882:Hydroxyapatites / Q000737:chemistry; D013298:Streptococcus sanguis / Q000187:drug effects / Q000502:physiology*
chemical_list: D006882:Hydroxyapatites; D002118:Calcium