title: [The effect of 2 bleaching agents on the enamel surface. An in-vitro study].
abstract: We present a study "in vitro" of the effect of bleaching agents on dental surfaces using the "Walking bleaching technique". We found that hydrogen peroxide bleached more quickly than carbamide although, after a period of six weeks, the results were the same as far as whitening was concerned. In the scanning electron microscope we observed significantly different changes in each case. Carbamide caused a regular and uniform opening of the enamel prisms of the surface while hydrogen peroxide produced more severe superficial destruction with the appearance of patterning similar to the acid etching, and the presence of some crystalline areas emerging from the body of the prisms.
authors.affiliation: Departamento de Cirugia, Facultad de Medicina y Odontologia, Universidad de Valencia.
authors.forename: M C
authors.initials: MC
authors.lastname: Llena Puy
authors.forename: L
authors.initials: L
authors.lastname: Forner Navarro
authors.forename: A
authors.initials: A
authors.lastname: Ferrandez
authors.forename: J V
authors.initials: JV
authors.lastname: Faus Llacer
mesh_terms: D000077463:Carbamide Peroxide; D003743:Dental Enamel / Q000187:drug effects* / Q000648:ultrastructure; D004338:Drug Combinations; D005782:Gels; D006801:Humans; D006861:Hydrogen Peroxide / Q000494:pharmacology; D066298:In Vitro Techniques; D008855:Microscopy, Electron, Scanning; D010545:Peroxides / Q000494:pharmacology; D013499:Surface Properties; D013997:Time Factors; D014073:Tooth Bleaching / Q000379:methods*; D014508:Urea / Q000031:analogs & derivatives / Q000494:pharmacology
chemical_list: D004338:Drug Combinations; D005782:Gels; D010545:Peroxides; D000077463:Carbamide Peroxide; D014508:Urea; D006861:Hydrogen Peroxide
vernacular_title: Effet de deux agents de blanchiment sur la surface de l'émail. Etude in vitro.