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Quintessence Publishing: Journals: QI
Quintessence International

Edited by Eli Eliav

ISSN 0033-6572 (print) • ISSN 1936-7163 (online)

April 2008
Volume 39 , Issue 4

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Spectrophotometric evaluation of the efficacy of a new in-office bleaching technique

Nacer Benbachir, Dr Med Dent/Stefano Ardu, Dr Med Dent/Ivo Krejci, Prof Dr Med Dent

Pages: 299306
PMID: 19081898

Objective: To quantitatively test the hypothesis that a new paint-on bleaching gel has the potential to lighten tooth color in clinical situations and to evaluate the change of the tooth color six months after the bleaching procedure. Method and Materials: Ten adult subjects requesting tooth bleaching were selected to participate in this randomized clinical trial involving a new in-office bleaching technique using VivaStyle Paint On Plus (Ivoclar Vivadent), originally designed as an over-the-counter bleaching gel. Digital images and CIE L*a*b* spectrophotometric measurements were taken at baseline (I), after the bleaching treatment (PB), and 6 months after bleaching (6M). Differences in L*a*b* values were tested with a repeated measures analysis of variance (ANOVA). Differences in DELTA E values were tested with a factorial ANOVA. Results: Significant (P < .05) differences were detected in L*, as well as in a* and b* values, between initial (I) and post-bleaching (PB) and between initial (I) and 6 months post-op (6M). In contrast, there was no significant difference between post-bleaching (PB) and 6 months post-op (6M). Conclusion: This new bleaching technique proved to be efficient over a period of 6 months. It could be a less aggressive and more convenient alternative to traditional bleaching techniques. (Quintessence Int 2008;39:299306)

Key words: OTC bleaching products, randomized clinical trial, vital bleaching

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