Comparison of Two At-home Whitening Products of Similar Peroxide Concentration and Different Delivery Methods

Abstract

SUMMARY Purpose This study compared the whitening efficacy, side effects, and patients' preferences/perceptions of two whitening systems of similar peroxide concentration but different formulation and delivery methods. Methods The tooth color change of 24 participants was measured using a shade guide (BSG) and a spectrophotometer (ES). Color difference was calculated: ΔE* = [(ΔL*)2 + (Δa*)2 + (Δb*)2]1/2. One whitening treatment was randomly applied to the right or left maxillary anterior teeth and the other was applied to the contralateral teeth, at-home with 35% carbamide peroxide in a tray (TW) or with 14% hydrogen peroxide in strips (WS). The tooth color was evaluated at baseline, 15 and 30 days (15 days postwhitening). Participants rated their tooth and soft tissue sensitivity (1–10 scale) and completed a questionnaire on their preferences. Results were analyzed by repeated measurement regression analysis/Tukey and Mann-Whitney (p<0.05). Results At 15 days, the teeth treated with TW and WS presented ΔE* = 7 and 6, respectively (ΔBSG=3 for both), and at 30 days, they presented ΔE* = 7.5 and 6.5, respectively (ΔBSG=3 for both). There was no significant difference in tooth and soft tissue sensitivity between treatments. No participant reported tooth and gingival sensitivity at the postwhitening appointment. Of the participants, 83% preferred the TW over WS. Conclusion Both ΔE* and ΔBSG showed no significant difference in tooth color change between TW and SW at either time point. By the end of the study no participants reported tooth and gingival sensitivity. Participants preferred TW over SW.

Comparison of efficacy of tray-delivered carbamide and hydrogen peroxide for at-home bleaching: a systematic review and meta-analysis

“…They claim that these new systems are as effective as CP in equivalent concentrations with the advantage of requiring less time of use. However, the literature is still controversial as to which product is actually the most effective one [16][17][18]. Although an earlier systematic review of the literature has already evaluated the effectiveness of at-home bleaching agents [13], this review was published 8 years ago.…”

Mineral loss and color change of enamel after bleaching and staining solutions combination

“…1 Bleaching agents are unstable, releasing oxygen free radicals when in contact with dental tissues and oral moisture, therefore promoting oxidation of pigments present in the tooth while making it clearer. 2 However, even when obtaining satisfactory clinical results, 3,4 some clinicians have still expressed concerns about the effects of carbamide peroxide bleaching on the oral tissues, which have motivated studies to evaluate the possible adverse effects produced during and after the whitening procedures. [5][6][7] Scientific evidence has shown that enamel can show changes in its structure when exposed to carbamide peroxide affecting its composition and its morphology [8][9][10] and causing surface changes while decreasing the tooth's hardness.…”

Efficacy and Colour Stability of Two Different at-Home Bleaching Systems: One-year Randomized Controlled Clinical Trial

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