Abstract
Objectives
A systematic review and a network meta-analysis were performed to answer the following research question: “Is there any light-activation protocol capable of improving color change efficacy when associated with an in-office bleaching gel in adults?”
Material and methods
A search was performed in PubMed, Scopus, Web of Science, LILACS, BBO, Cochrane Library, and SIGLE without date and/or language restrictions in April 23, 2017 (updated on March 30, 2018). IADR abstracts (1990–2018), unpublished and ongoing trial registries, dissertations, and theses were also searched. Only randomized clinical trials conducted in adults that included at least one group treated with in-office dental bleaching with light activation were included. The risk of bias (RoB) was evaluated using the Cochrane Collaboration tool. A random-effects Bayesian-mixed treatment comparison (MTC) model was used to combine light-activated versus light-free in-office bleaching with direct light-free comparison trials. A meta-analysis with independent analysis (high- and low-concentrate hydrogen peroxide [HP]) was conducted for color change (∆E*, ∆SGU).
Results
After the removal of duplicates, title, and abstract screening, 28 studies remained. Nine were considered to be at a low RoB, five were at a high RoB, and the remaining were at an unclear RoB. The MTC analysis showed no significant difference in color change (ΔE* and ΔSGU) between light-activation protocols and light-free in-office bleaching, regardless of the HP concentration in the efficacy of the bleaching.
Conclusion
No type of light-activated in-office bleaching was superior to light-free in-office bleaching for both high- and low-concentrate in-office bleaching gels (PROSPERO—CRD42017078743).
Clinical relevance
Although many times dental professionals use “laser whitening” as a form of marketing, this study confirmed that no type of light-activation for in-office bleaching can improve the bleaching efficacy.
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Acknowledgments
The authors of this study would like to thank the following authors who kindly provided information not available in their full texts: Fabiano Marson, Gustavo Moncada, Jesus O. Calatayud, Alexandra Mena-Serrano, Jo M. Goodson, Joe C. Ontiveros, Jussara K. Bernardon, Letícia C. A. G de Almeida, Patricia M. de Freitas, Rafael F. L. Mondelli, Sevil Gurgan.
Funding
This study was partially supported by the National Council for Scientific and Technological Development from the Brazilian Government, under grants 303332/2017-4 and 305588/2014-1 and the Coordination of Improvement of Higher Level Personnel (CAPES) from the Brazilian Ministry of Education.
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Maran, B.M., Ziegelmann, P.K., Burey, A. et al. Different light-activation systems associated with dental bleaching: a systematic review and a network meta-analysis. Clin Oral Invest 23, 1499–1512 (2019). https://doi.org/10.1007/s00784-019-02835-x
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DOI: https://doi.org/10.1007/s00784-019-02835-x