title: Clinical efficacy of a bleaching system based on hydrogen peroxide with or without light activation.
abstract: The objective of the present study was to assess the clinical efficacy of a dental bleaching system based on hydrogen peroxide with or without light activation. This randomized controlled trial evaluated the effect of the light when applied to the hydrogen peroxide by using a split-mouth design with 21 patients, with light activation in one hemi-arch but not in the other. The bleaching agent was QuickWhite 35% hydrogen peroxide and activation was conducted with a diode lamp (Luma Cool). The Classic Vita Guide was used to score tooth shades. Two consecutive applications of hydrogen peroxide were made to one hemi-arch, each light-activated for 10 min. The other hemi-arch was then identically treated but without light activation. After removal of the bleaching agent, the shade was re-scored and the Wilcoxon signed ranks test was used to compare differences in tooth shade values. The bleaching treatment produced significant shade changes (P < 0.01) in both hemi-arches. After treatment, there were no statistically significant differences between light-treated and non-light-treated tooth types (central incisors, lateral incisors, and canines). However, taking central incisor, lateral incisor, and canine as a group, comparison between each hemi-arch showed a significant effect in the hemi-arch with light activation (P < 0.05). The use of diode light with a 35% hydrogen peroxide gel slightly improved the dental bleaching.
authors.affiliation: Departamento de Estomatología II, Facultad de Odontología, Universidad Complutense de Madrid, Spain. dentaloteo@telefonica.net
authors.forename: Jesús Oteo
authors.initials: JO
authors.lastname: Calatayud
authors.forename: Carlos Oteo
authors.initials: CO
authors.lastname: Calatayud
authors.forename: Alvaro Oteo
authors.initials: AO
authors.lastname: Zaccagnini
authors.forename: Ma José Calvo
authors.initials: MJ
authors.lastname: Box
mesh_terms: D000293:Adolescent; D000328:Adult; D055117:Curing Lights, Dental; D005260:Female; D006801:Humans; D006861:Hydrogen Peroxide / Q000627:therapeutic use*; D008027:Light; D012666:Semiconductors; D016037:Single-Blind Method; D018709:Statistics, Nonparametric; D014073:Tooth Bleaching; D055815:Young Adult
chemical_list: D006861:Hydrogen Peroxide