Abstract
Objectives
The aim of this study was to evaluate the esthetic perception of patients at 6 months after bleaching of non-vital teeth with 35% of hydrogen peroxide and 37% of carbamide peroxide using a walking bleach technique. We also assessed psychosocial impacts as well as the clinical effectiveness and stability of the color change.
Materials and methods
The teeth bleaching treatment was randomly assigned to two groups according to the bleaching agent used: G1 HP = 35% of hydrogen peroxide (n = 25) and G2 CP = 37% of carbamide peroxide (n = 25). The non-vital bleaching was performed in four sessions using the walking bleach technique. The color was objectively (ΔE) and subjectively (ΔSGU) evaluated. The esthetic perception and psychosocial factors were evaluated before treatment as well as one and 6 months post-treatment using Oral Health Impact Profile (OHIP) esthetics and Psychosocial Impact of Dental Esthetics Questionnaire (PIDAQ).
Results
The color change (ΔE) at 6 months (G1 = 14.53 ± 5.07 and G2 = 14.09 ± 6.61) for both color groups remained stable until the 6-month post-treatment (p > 0.05). There was a decrease in the values of OHIP esthetics and PIDAQ after treatment compared to the baseline (p < 0.05), and this effect was maintained 6 months post-treatment.
Conclusions
Both agents were highly effective and maintained the color stability at 6 months; this positively affected the esthetic perception and psychosocial impact of patients who also remained stable over time.
Clinical relevance
Non-vital bleaching produces a positive and stable impact on the esthetic perception and psychosocial factors at medium-term follow-ups.
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Acknowledgements
The author dedicates this article to his two kids Elisa and Eduardo by their enormous inspiration
Funding
The work was supported by Fondecyt 1170575.
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This randomized clinical study was approved by the Ethics Committee of the Faculty of Dentistry of the University of Chile (2016/04) and was conducted in accordance with the Consolidated Reporting Standards and the Helsinki Declaration.
Conflict of interest
Cristian Bersezio declares that he has no conflict of interest. Paulina Ledezma declares that she has no conflict of interest. Carla Mayer declares that she has no conflict of interest. Oriana Rivera declares that she has no conflict of interest. Osmir O Junior and Eduardo Fernández declare that they have no conflict of interest.
Ethical approval
This clinical study was approved by the Ethics Committee of the Faculty of Dentistry at the University of Chile (PRI-ODO 16/04) and was conducted according to the Consolidated Standards of Reporting Trials Statement and Helsinki Declaration of 1975 revised in 2000. All persons gave their informed consent prior to their inclusion in the study. Details that might disclose the identity of the subjects under study were omitted.
Informed consent
Informed consent was obtained from all individual participants included in the study.
Additional information
ClinicalTrials.gov identifier: NCT02718183
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Bersezio, C., Ledezma, P., Mayer, C. et al. Effectiveness and effect of non-vital bleaching on the quality of life of patients up to 6 months post-treatment: a randomized clinical trial. Clin Oral Invest 22, 3013–3019 (2018). https://doi.org/10.1007/s00784-018-2389-y
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DOI: https://doi.org/10.1007/s00784-018-2389-y