title: Bleaching using 30% hydrogen peroxide and sodium hydrogen carbonate.
abstract: This study investigated the bleaching efficacy of a mixture of sodium hydrogen carbonate (NaHCO(3)) and 30% hydrogen peroxide (H(2)O(2)), the latter being an active ingredient in in-office bleaching products. A commercially available 35% H(2)O(2)-based in-office bleaching product was used as a control and for comparison. Enamel surfaces after bleaching were evaluated for post-bleaching color change, Vickers hardness, surface roughness, erosion depth, and surface morphology (SEM images). The bleaching efficacy of 30%H(2)O(2)-NaHCO(3) was comparable to that of control, and favorable results over the control were obtained after bleaching with 30%H(2)O(2)-NaHCO(3), lower increase in surface roughness, smaller erosion depth, and reduced extent of enamel erosion based on SEM images. These results were obtained because an addition of NaHCO(3) to H(2)O(2) changed the initially low pH to a higher one.
authors.affiliation: Department of Operative Dentistry, School of Dental Medicine, Tsurumi University, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama 230-8501, Japan. ito-yuko@tsurumi-u.ac.jp
authors.forename: Yuko
authors.initials: Y
authors.lastname: Ito
authors.forename: Yasuko
authors.initials: Y
authors.lastname: Momoi
mesh_terms: D000818:Animals; D002417:Cattle; D003124:Colorimetry; D055117:Curing Lights, Dental; D003743:Dental Enamel / Q000187:drug effects / Q000648:ultrastructure; D006244:Hardness; D006801:Humans; D006813:Humidity; D006861:Hydrogen Peroxide / Q000008:administration & dosage / Q000627:therapeutic use*; D006863:Hydrogen-Ion Concentration; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D017693:Sodium Bicarbonate / Q000008:administration & dosage / Q000627:therapeutic use*; D013053:Spectrophotometry; D013696:Temperature; D013997:Time Factors; D014073:Tooth Bleaching / Q000295:instrumentation / Q000379:methods*; D058205:Tooth Bleaching Agents / Q000008:administration & dosage / Q000627:therapeutic use*; D014077:Tooth Erosion / Q000473:pathology; D016896:Treatment Outcome
chemical_list: D058205:Tooth Bleaching Agents; D017693:Sodium Bicarbonate; D006861:Hydrogen Peroxide