title: [An in vitro study of anti  acidic etching effect of polypeptide-containing toothpaste on dental enamel]
abstract: OBJECTIVE:The present study was to investigate the anti-acidic etching effect of a kind of toothpaste containing biotin-polypeptide. METHODS:28 enamel slabs were treated with polypeptide-containing toothpaste in the pH-cycle environment,and then were analyzed by micro-hardness detector and polarized light microscope.RESULTS:The dental enamel treated with polypeptide-containing toothpaste was harder than the control group (P<0.0001);and the degree of demineralization in treated group was also less than the control one.CONCLUSION:There was certain acid  resistant effect using the polypeptide  containing toothpaste to treat the dental enamel.
authors.affiliation: Nith People's Hospital,Shanghai Second Medical University. Shanghai 200011,China.
authors.forename: B
authors.initials: B
authors.lastname: Zhang
authors.forename: W G
authors.initials: WG
authors.lastname: Zhang
authors.forename: L
authors.initials: L
authors.lastname: Li