title: Clinical evaluation of a new bleaching product "Polanight" in a Japanese population.
abstract: Home bleaching techniques have been applied as a safe and effective bleaching procedure. Many manufacturers are now marketing home tooth-bleaching products. The purpose of this study was to compare a new bleaching product, Polanight (PN) with a widely used home bleaching product, Opalescence (OP). Fifty-eight healthy Japanese volunteers of both sexes (18 to 47 years of age) were selected. Using a simultaneous split-mouth protocol, custom-made trays with PN and OP were applied to the maxillary right anterior teeth and left anterior teeth, respectively. The shades of the maxillary canine teeth were measured with a portable chromameter (Shade Eye Ex) at the first examination and at 4 weeks (after 2-week bleaching and 2-week rest). Tooth shade changes were analyzed using the Commission Internationale d'Eclairage (CIE) Lab units. Means of whiteness-blackness difference (DeltaL*), redness-greenness difference (Deltaa*), and yellowness-blueness difference (Deltab*) were 4.00, -1.28 and -7.53 for PN, and 2.54, -0.99, and -5.56 for OP, respectively. Means of color difference (DeltaE*) were 9.23 and 7.78 for PN and OP, respectively. Treatment with either agent demonstrated significant bleaching effects produced by the treatment. The new product, PN, showed significant differences in DeltaL* (P < 0.05) and Deltab* (P < 0.005), but not in the redness-greenness (a*) value when compared with OP. Bleaching with PN was considered more effective than that with OP in the young patient group and in the women.
authors.affiliation: Department of Biochemistry, The Nippon Dental University School of Dentistry at Niigata, 1-8 Hamaura-cho, Niigata 951-8580, Japan. hshimo@ngt.ndu.ac.jp
authors.forename: Shuichi
authors.initials: S
authors.lastname: Tsubura
authors.forename: Ryuji
authors.initials: R
authors.lastname: Yamaguchi
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000077463:Carbamide Peroxide; D003116:Color; D003124:Colorimetry / Q000379:methods; D003807:Dentin Sensitivity / Q000139:chemically induced; D004338:Drug Combinations; D005260:Female; D005782:Gels; D005891:Gingivitis / Q000139:chemically induced; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D016877:Oxidants / Q000008:administration & dosage / Q000627:therapeutic use*; D010545:Peroxides / Q000008:administration & dosage / Q000627:therapeutic use*; D012648:Self Care; D012737:Sex Factors; D014070:Tooth / Q000473:pathology; D014073:Tooth Bleaching / Q000295:instrumentation / Q000379:methods*; D014508:Urea / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000627:therapeutic use
chemical_list: D004338:Drug Combinations; D005782:Gels; D016877:Oxidants; D010545:Peroxides; D000077463:Carbamide Peroxide; D014508:Urea