Quantitative analysis of KTP laser photodynamic bleaching of tetracycline-discolored teeth

Kuzekanani, Maryam and Walsh, Laurence J. (2009) Quantitative analysis of KTP laser photodynamic bleaching of tetracycline-discolored teeth. Photomedicine and Laser Surgery, 27 3: 521-525. doi:10.1089/pho.2008.2332

Author Kuzekanani, Maryam
Walsh, Laurence J.
Title Quantitative analysis of KTP laser photodynamic bleaching of tetracycline-discolored teeth
Journal name Photomedicine and Laser Surgery   Check publisher's open access policy
ISSN 1549-5418
Publication date 2009-06
Sub-type Article (original research)
DOI 10.1089/pho.2008.2332
Volume 27
Issue 3
Start page 521
End page 525
Total pages 5
Place of publication New Rochelle, NY, United States
Publisher Mary Ann Liebert
Collection year 2010
Language eng
Formatted abstract
Objective and Background Data: Photodynamic bleaching is a recently developed method that may be suitable for photo-oxidation of difficult internal stains. This study examined the outcomes of photodynamic bleaching for treatment of confirmed cases of tetracycline discoloration, when used as a single-appointment procedure.

Materials and Methods:
Digital analysis of standardized pre- and post-treatment digital photographs of a total of 90 maxillary incisors from 23 adult patients undergoing photodynamic bleaching was undertaken. The patients were treated by a visible green KTP laser (wavelength 532 nm) combined with a rhodamine-B photosensitizer gel (Smartbleach) applied to the teeth and activated for 30 sec. Each tooth underwent four cycles of 30 sec of laser exposure. Digital image analysis was undertaken in a blinded manner, and we examined changes in the four maxillary incisors in terms of blue pixel intensity (yellowness).

Least squares linear regression analysis and a one-tailed paired t-test using the matched pairs of pre- and post-treatment data for mean blue pixel intensity showed that a significant lightening effect was achieved by the bleaching treatment. Significant increases in blue pixel intensity (reductions in yellowness) occurred in 78% of the teeth treated.

In-office KTP laser photodynamic bleaching provides a clinically useful improvement in tooth shade in teeth with tetracycline discoloration. 
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Dentistry Publications
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Citation counts: TR Web of Science Citation Count  Cited 5 times in Thomson Reuters Web of Science Article | Citations
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Created: Thu, 03 Sep 2009, 07:52:40 EST by Mr Andrew Martlew on behalf of School of Dentistry