title: Whitening techniques using the diode laser and halogen lamp in human devitalized primary teeth.
abstract: The aim of this study was to make an in vivo assessment of 2 whitening techniques in deciduous teeth, with the variable being the source of energy activation. Ten upper central incisors darkened by trauma were selected and whitening agent used was a 35% hydrogen peroxide. The teeth were distributed into 2 groups: group 1-activation with an infrared diode laser (GaAlAs), and group 2-activation with a halogen lamp. Assessment of whitening was done by color analysis with the Vita 3D scale at 3 different times: before whitening, immediately after whitening, and 1 week after whitening. A Kruskal-Wallace test showed that there were no significant difference between the 2 groups when comparing group 1 and 2 and comparing 2 and 3 immediately and after 1 week of treatment. Laser activation of the whitening agent was not more effective than halogen light activation for root canal-treated deciduous teeth.
authors.affiliation: Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of São Paulo (USP), São Paulo, Brazil.
authors.forename: Isa T
authors.initials: IT
authors.lastname: Gontijo
authors.forename: Ricardo S
authors.initials: RS
authors.lastname: Navarro
authors.forename: Ana Lídia
authors.initials: AL
authors.lastname: Ciamponi
authors.forename: Denise Maria
authors.initials: DM
authors.lastname: Zezell
mesh_terms: D002648:Child; D002675:Child, Preschool; D003116:Color; D005500:Follow-Up Studies; D006801:Humans; D006861:Hydrogen Peroxide / Q000627:therapeutic use; D007180:Incisor / Q000293:injuries / Q000528:radiation effects; D054023:Lasers, Semiconductor / Q000627:therapeutic use*; D008029:Lighting / Q000295:instrumentation*; D015588:Observer Variation; D016877:Oxidants / Q000627:therapeutic use; D012390:Root Canal Therapy; D016037:Single-Blind Method; D014073:Tooth Bleaching / Q000379:methods*; D014075:Tooth Discoloration / Q000532:radiotherapy*; D014094:Tooth, Deciduous / Q000528:radiation effects*; D019553:Tooth, Nonvital / Q000532:radiotherapy*
chemical_list: D016877:Oxidants; D006861:Hydrogen Peroxide