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A randomized controlled trial of home tooth-whitening products.
Am J Dent. 2007 Oct; 20(5):315-8.AJ

Abstract

PURPOSE

To evaluate the effectiveness of two marketed home tooth-whitening products.

METHODS

A randomized controlled clinical trial involving 87 adults who were randomly allocated into one of three groups: (1) 6% hydrogen peroxide whitening strips, (2) 18% carbamide peroxide whitening gel, and (3) a placebo (fluoride toothpaste) control group. Subjects were instructed individually and then used the given product daily for 2 consecutive weeks. Color was determined in brightness (L*), yellowness (b*) and redness (a*) [color space] at baseline and 8 weeks after dispensing the product by employing a high resolution digital camera (Fuji HC1000 CCD) to image the subject's anterior maxillary teeth under standard polarized lighting conditions. The subjects also completed a questionnaire on self-satisfaction with the treatment outcome.

RESULTS

One-way ANOVA (Bonferroni test) demonstrated significant differences in color between the three groups with changes in brightness (L*, P< 0.001), yellowness (b*, P< 0.001) and redness (a*, P < 0.001). Changes in L* a* b* was greatest among those who used the 6% hydrogen peroxide whitening strips. Subjects in the whitening strip group also rated that product significantly (P < 0.01) more favorably than other groups with respect to the amount of whiteness improvement, as well as whitening satisfaction and overall impression while there is no significant difference between the whitening gel and the placebo groups.

Authors+Show Affiliations

Faculty of Dentistry, The University of Hong Kong, 34 Hospital Road, Hong Kong. edward-lo@hku.hkNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Randomized Controlled Trial

Language

eng

PubMed ID

17993029

Citation

Lo, Edward C M., et al. "A Randomized Controlled Trial of Home Tooth-whitening Products." American Journal of Dentistry, vol. 20, no. 5, 2007, pp. 315-8.
Lo EC, Wong AH, McGrath C. A randomized controlled trial of home tooth-whitening products. Am J Dent. 2007;20(5):315-8.
Lo, E. C., Wong, A. H., & McGrath, C. (2007). A randomized controlled trial of home tooth-whitening products. American Journal of Dentistry, 20(5), 315-8.
Lo EC, Wong AH, McGrath C. A Randomized Controlled Trial of Home Tooth-whitening Products. Am J Dent. 2007;20(5):315-8. PubMed PMID: 17993029.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A randomized controlled trial of home tooth-whitening products. AU - Lo,Edward C M, AU - Wong,Anthony H H, AU - McGrath,Colman, PY - 2007/11/13/pubmed PY - 2008/1/8/medline PY - 2007/11/13/entrez SP - 315 EP - 8 JF - American journal of dentistry JO - Am J Dent VL - 20 IS - 5 N2 - PURPOSE: To evaluate the effectiveness of two marketed home tooth-whitening products. METHODS: A randomized controlled clinical trial involving 87 adults who were randomly allocated into one of three groups: (1) 6% hydrogen peroxide whitening strips, (2) 18% carbamide peroxide whitening gel, and (3) a placebo (fluoride toothpaste) control group. Subjects were instructed individually and then used the given product daily for 2 consecutive weeks. Color was determined in brightness (L*), yellowness (b*) and redness (a*) [color space] at baseline and 8 weeks after dispensing the product by employing a high resolution digital camera (Fuji HC1000 CCD) to image the subject's anterior maxillary teeth under standard polarized lighting conditions. The subjects also completed a questionnaire on self-satisfaction with the treatment outcome. RESULTS: One-way ANOVA (Bonferroni test) demonstrated significant differences in color between the three groups with changes in brightness (L*, P< 0.001), yellowness (b*, P< 0.001) and redness (a*, P < 0.001). Changes in L* a* b* was greatest among those who used the 6% hydrogen peroxide whitening strips. Subjects in the whitening strip group also rated that product significantly (P < 0.01) more favorably than other groups with respect to the amount of whiteness improvement, as well as whitening satisfaction and overall impression while there is no significant difference between the whitening gel and the placebo groups. SN - 0894-8275 UR - https://www.unboundmedicine.com/medline/citation/17993029/A_randomized_controlled_trial_of_home_tooth_whitening_products_ DB - PRIME DP - Unbound Medicine ER -