title: [Experimental study on polyphenol anti-plaque effect in human].
abstract: OBJECTIVE
  To evaluate anti-caries effect of Chinese green tea's polyphenol.
  
  
  METHODS
  150 volunteers are randomly divided into 3 groups: A, B test group and contrast group, 50 persons in each. People in test groups were given polyphenol's tablet, placebo was given in contrast group, a tablet three times a day. After 3 weeks, group A was given placebo and group B continued polyphenol for 6 weeks.
  
  
  RESULTS
  After using polyphenol's tablet for 2 weeks, the plaque index of test groups were evidently lower than the contrast group (P < 0.01). After stopping use of polyphenol tablet, the effect was still kept for 3 weeks.
  
  
  CONCLUSIONS
  It can be concluded that polyphenol tablet from Chinese green tea has evident anti-plaque effect.
authors.affiliation: Department of Stomatology, Affiliated Hospital of Shandong Traditional Chinese Medical University, Jinan 250011, China.
authors.forename: T
authors.initials: T
authors.lastname: Liu
authors.forename: Y
authors.initials: Y
authors.lastname: Chi
mesh_terms: D002648:Child; D003773:Dental Plaque / Q000188:drug therapy*; D005260:Female; D005419:Flavonoids; D006801:Humans; D008297:Male; D010636:Phenols / Q000627:therapeutic use*; D011108:Polymers / Q000627:therapeutic use*; D059808:Polyphenols; D013607:Tablets; D013662:Tea / Q000737:chemistry*; D016896:Treatment Outcome
chemical_list: D005419:Flavonoids; D010636:Phenols; D011108:Polymers; D059808:Polyphenols; D013607:Tablets; D013662:Tea