title: Efficacy and oral side effects of two highly concentrated tray-based bleaching systems.
abstract: The aim of this study was to investigate the tooth-whitening efficacy and oral side effects of the two tray-based bleaching systems Visalys whitening (VW) and Opalescence PF (OP). A stratified, randomised distribution of the subjects (n = 60) to two treatment groups was performed according to baseline tooth brightness (L* values) as determined by colourimeter and to the criteria smoker/non-smoker. Tooth colour was evaluated by measuring L*a*b* values generated from standardised digital image analysis with Adobe Photoshop of the facial surfaces of the right central maxillary incisor. Tooth hypersensitivity, with intensity graded from 0 (no hypersensitivity) to 10 (high hypersensitivity), was assessed chair-side using an air syringe. After bleaching therapy, both treatment groups demonstrated significant improvements in tooth colour (p < or = 0.05). A shift towards less yellow (-Deltab*) and brighter (+DeltaL*) tooth colour was observed. Deltab* was significantly higher in the OP group in comparison to the VW group, DeltaL* showed no significant difference between the both treatment groups (p < or = 0.05). After bleaching, the intensity of tooth hypersensitivity was increased significantly compared to baseline in both groups (p < or = 0.05), with no significant difference between the both groups. Both highly concentrated bleaching systems are effective as tooth-whitening systems, with few reported side effects such as transient tooth hypersensitivity.
authors.affiliation: Department of Operative Dentistry, Preventive Dentistry and Periodontology, Georg-August University of Goettingen, Robert-Koch Str 40, 37075, Goettingen, Germany. dirk.ziebolz@zm-goettingen.de
authors.forename: Dirk
authors.initials: D
authors.lastname: Ziebolz
authors.forename: Kristina
authors.initials: K
authors.lastname: Helms
authors.forename: Christian
authors.initials: C
authors.lastname: Hannig
authors.forename: Thomas
authors.initials: T
authors.lastname: Attin
mesh_terms: D000077463:Carbamide Peroxide; D003124:Colorimetry; D003807:Dentin Sensitivity / Q000139:chemically induced; D004338:Drug Combinations; D005891:Gingivitis / Q000139:chemically induced; D006801:Humans; D006861:Hydrogen Peroxide / Q000008:administration & dosage* / Q000009:adverse effects; D007091:Image Processing, Computer-Assisted; D007180:Incisor / Q000187:drug effects / Q000473:pathology; D009055:Mouth / Q000187:drug effects*; D016877:Oxidants / Q000008:administration & dosage* / Q000009:adverse effects; D010146:Pain / Q000139:chemically induced; D010545:Peroxides / Q000008:administration & dosage* / Q000009:adverse effects; D023861:Photography, Dental; D012907:Smoking; D014073:Tooth Bleaching / Q000009:adverse effects / Q000379:methods*; D014075:Tooth Discoloration / Q000188:drug therapy / Q000473:pathology; D016896:Treatment Outcome; D014508:Urea / Q000008:administration & dosage / Q000009:adverse effects / Q000031:analogs & derivatives*
chemical_list: D004338:Drug Combinations; D016877:Oxidants; D010545:Peroxides; D000077463:Carbamide Peroxide; D014508:Urea; D006861:Hydrogen Peroxide