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VOLUME 16 , ISSUE 5 ( May, 2015 ) > List of Articles

RESEARCH ARTICLE

Employment of Reservoirs in At-Home Whitening Trays: Efficacy and Efficiency in Tooth Whitening

Fang Qian, Serena Geisinger, So Ran Kwon

Citation Information : Qian F, Geisinger S, Kwon SR. Employment of Reservoirs in At-Home Whitening Trays: Efficacy and Efficiency in Tooth Whitening. J Contemp Dent Pract 2015; 16 (5):383-388.

DOI: 10.5005/jp-journals-10024-1694

Published Online: 01-10-2015

Copyright Statement:  Copyright © 2015; The Author(s).


Abstract

Aim

This study aimed to determine the efficacy of trays made with and without reservoirs, in conjunction with time and cost evaluations, by measuring color change with home whitening procedures.

Materials and methods

Extracted human maxillary teeth (central incisors n = 20; canines n = 20; molars n = 20) and 60 artificial teeth (lateral n = 20; premolar n = 40) were mounted into ten typodonts. Tray fabrication was completed such that a blockout resin reservoir was placed on half of the buccal surface of the tray, while the other half remained without a reservoir. Whitening with custom fabricated trays was performed based on two different whitening regimens, where each regimen was assigned to five typodonts: Night-time: Opalescence PF 10% carbamide peroxide for 8 hours daily and Day-time: Philips DayWhite 9.5% hydrogen peroxide for 30 minutes, twice daily. Both systems were applied for 1 week. To evaluate tooth shade, the VITA Easyshade® Advance 4.0 spectrophotometer was used. Color measurements were obtained at baseline (T1), 1-day post-whitening (T2), and 1 month post-whitening (T3). One-way ANOVA, followed by post-hoc Tukey's HSD test, was used to detect significant difference in the overall color change (ΔE*) among the four groups at T2 and T3. Additionally, paired-sample t-test was used to assess difference in ΔE* between T2 and T3 treatment within each of four techniques of tray fabrication.

Results

No significant difference in ΔE* was found among the four groups at T2 and T3 (p > 0.05 in each instance). There were significant differences in mean ΔE* between T2 and T3 treatment for the day white treatment groups without reservoir (6.96 vs 10.19 respectively; p = 0.0026) and with reservoirs (6.23 vs 9.79 respectively; p = 0.0031).

Conclusion

The use of reservoirs does not have a significant effect on whitening efficacy, regardless of type of whitening material and regimen.

Clinical significance

The use of custom fabricated trays with or without reservoirs were equally effective in whitening teeth.

How to cite this article

Geisinger S, Kwon SR, Qian F. Employment of Reservoirs in At-Home Whitening Trays: Efficacy and Efficiency in Tooth Whitening. J Contemp Dent Pract 2015;16(5):383-388.


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