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Effect of a New Bleaching Gel on Tooth Whitening
Operative Dentistry
|August 23, 2017
Summary
Opalescence demonstrated superior tooth whitening compared to KöR immediately after treatment and at six months. While both systems showed similar improvements in lightness (ΔL*), Opalescence provided greater reductions in yellowness (Δb*) and overall color change (ΔE*).
Area of Science:
- Dental materials science
- Cosmetic dentistry
- Biomaterials
Background:
- Tooth discoloration is a common aesthetic concern.
- Professional and at-home bleaching agents are widely used for tooth whitening.
- Novel bleaching formulations aim to improve efficacy and longevity.
Purpose of the Study:
- To compare the whitening efficacy of a novel tribarrel hydremide-peroxide gel (KöR) with traditional hydrogen peroxide or carbamide peroxide systems (Opalescence).
- To evaluate the long-term color stability of two different bleaching agents.
Main Methods:
- Bovine incisors were used in a custom mounting device.
- Four groups of ten teeth were subjected to in-office and/or home bleaching with KöR and Opalescence gels.
- Spectrophotometer readings (L* a* b*) were taken at baseline, immediately post-bleaching, and at three and six months.
Main Results:
- Immediately post-bleaching, Opalescence showed greater changes in ΔE* and Δb* (less yellow) than KöR for combined and home bleaching.
- After six months, Opalescence maintained significantly greater ΔE* and Δb* compared to KöR for home bleaching only.
- No significant differences in lightness (ΔL*) were observed between the two systems at any time point.
Conclusions:
- Opalescence exhibited superior whitening efficacy and longer-lasting results compared to KöR, particularly for home bleaching protocols.
- Both bleaching systems achieved similar improvements in tooth lightness.
- Further research may explore the mechanisms behind the differing color stability of these agents.
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