Effect of photo-Fenton bleaching on tetracycline-stained dentin in vitro

Bennett, Zackary Yale and Walsh, Laurence James (2015) Effect of photo-Fenton bleaching on tetracycline-stained dentin in vitro. Journal of Contemporary Dental Practice, 16 2: 126-129. doi:10.5005/jp-journals-10024-1648

Author Bennett, Zackary Yale
Walsh, Laurence James
Title Effect of photo-Fenton bleaching on tetracycline-stained dentin in vitro
Formatted title
Effect of photo-Fenton bleaching on tetracycline-stained dentin in vitro
Journal name Journal of Contemporary Dental Practice   Check publisher's open access policy
ISSN 1526-3711
Publication date 2015-02
Year available 2015
Sub-type Article (original research)
DOI 10.5005/jp-journals-10024-1648
Open Access Status Not Open Access
Volume 16
Issue 2
Start page 126
End page 129
Total pages 4
Place of publication New Delhi, India
Publisher Jaypee Brothers Medical Publishers
Collection year 2016
Language eng
Formatted abstract
Aim: Tetracycline-stained tooth structure is difficult to bleach using nightguard tray methods. The possible benefits of in-office light-accelerated bleaching systems based on the photo-Fenton reaction are of interest as possible adjunctive treatments. This study was a proof of concept for possible benefits of this approach, using dentine slabs from human tooth roots stained in a reproducible manner with the tetracycline antibiotic demeclocycline hydrochloride.

Materials and methods: Color changes overtime in tetracycline stained roots from single rooted teeth treated using gel (Zoom! WhiteSpeed®) alone, blue LED light alone, or gel plus light in combination were tracked using standardized digital photography. Controls received no treatment. Changes in color channel data were tracked overtime, for each treatment group (N = 20 per group).

Results: Dentin was lighter after bleaching, with significant improvements in the dentin color for the blue channel (yellow shade) followed by the green channel and luminosity. The greatest changes occurred with gel activated by light (p < 0.0001), which was superior to effects seen with gel alone. Use of the light alone did not significantly alter shade.

Conclusion: This proof of concept study demonstrates that bleaching using the photo-Fenton chemistry is capable of lightening tetracycline-stained dentine. Further investigation of the use of this method for treating tetracycline-stained teeth in clinical settings appears warranted.

Clinical significance: Because tetracycline staining may respond to bleaching treatments based on the photo-Fenton reaction, systems, such as Zoom! WhiteSpeed, may have benefits as adjuncts to home bleaching for patients with tetracycline-staining.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Dentistry Publications
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Created: Thu, 11 Feb 2016, 10:28:40 EST by Elisha Bignell on behalf of School of Dentistry