title: Comparative seven-day clinical evaluation of two tooth whitening products.
abstract: A 1-week study was conducted to compare the tooth whitening efficacy of two carbamide peroxide-based products (one containing 5% carbamide peroxide and one containing 10% carbamide peroxide). In addition, the perception of transient tooth hypersensitivity associated with the use of these products was subjectively evaluated. Sixty participants took part in a double-blind, randomized, parallel clinical study. Change in tooth color was measured by chroma meter and Vita shade guide at the initiation of the study and after 7 days of product use. Color change (delta E) was calculated using the color-difference equation established by the Commission Internationale de L'Eclairage. Data concerning dental hypersensitivity was assessed by subjective panelist questionnaires administered after the day 7 recall examination. Results of the whitening data showed that there was no significant difference between the two products. After 1 week, the mean delta E for the product containing 5% carbamide peroxide was 4.43 +/- 1.89 and the mean delta E for the product containing 10% carbamide peroxide was 4.05 +/- 1.84. However, the subjective data collected on tooth hypersensitivity showed that the product containing 5% carbamide peroxide was associated with less discomfort. Of the group using the 5% carbamide peroxide product, 20% reported transient sensitivity of their teeth after product use for 1 week compared with 53% of the group using the product with 10% carbamide peroxide. Statistical analysis using a 2-tailed t test showed significant differences between the two groups (P < .05). The data suggest that these products are clinically equivalent for tooth whitening; however, the product containing 5% carbamide peroxide was associated with less tooth hypersensitivity after 1 week of application.
authors.affiliation: Oral Health Clinical Services, Piscataway, New Jersey, USA.
authors.forename: S
authors.initials: S
authors.lastname: Nathoo
authors.forename: E
authors.initials: E
authors.lastname: Santana
authors.forename: Y P
authors.initials: YP
authors.lastname: Zhang
authors.forename: N
authors.initials: N
authors.lastname: Lin
authors.forename: M
authors.initials: M
authors.lastname: Collins
authors.forename: K
authors.initials: K
authors.lastname: Klimpel
authors.forename: W
authors.initials: W
authors.lastname: DeVizio
authors.forename: M
authors.initials: M
authors.lastname: Giniger
mesh_terms: D000328:Adult; D000077463:Carbamide Peroxide; D003807:Dentin Sensitivity / Q000139:chemically induced*; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D004338:Drug Combinations; D006801:Humans; D008297:Male; D008875:Middle Aged; D017060:Patient Satisfaction / Q000706:statistics & numerical data*; D010545:Peroxides / Q000008:administration & dosage* / Q000009:adverse effects; D014073:Tooth Bleaching / Q000379:methods*; D014075:Tooth Discoloration / Q000628:therapy*; D016896:Treatment Outcome; D014508:Urea / Q000008:administration & dosage* / Q000009:adverse effects / Q000031:analogs & derivatives
chemical_list: D004338:Drug Combinations; D010545:Peroxides; D000077463:Carbamide Peroxide; D014508:Urea