Assessment of the temporal variation of electrical potential and pH of different bleaching agents
| Autor: | Joatan Lucas de Sousa Gomes Costa, Osmir Batista de Oliveira Júnior, Básia Rabelo Nogueira, Hermes Pretel, Fernando Luis Esteban Florez |
|---|---|
| Přispěvatelé: | Universidade Estadual Paulista (UNESP), College of Dentistry |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Science (General)
Kinetics Dental bleaching Redox pH meter chemistry.chemical_compound Q1-390 medicine Hydrogen peroxide Tooth whitening H1-99 Multidisciplinary Chromatography Temporal evolution Chemistry pH Repeated measures design Depolarization Temporal correlation medicine.disease Social sciences (General) Electric potential Dentin hypersensitivity Analysis of variance Research Article |
| Zdroj: | Heliyon Heliyon, Vol 7, Iss 11, Pp e08452-(2021) Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| ISSN: | 2405-8440 |
| Popis: | Introduction Tooth whitening procedures are under continuous investigation to improve esthetic outcomes and reduce bleaching sensitivity (BS) precipitating from treatments. During the dental bleaching process it is known that the release of free radicals degrades the organic pigment molecules of the tooth and with this an amount of energy is released. Nonetheless, previous studies have never investigated the temporal correlation between of pH and electric potential (EP) generated in this treatment. Objectives Therefore, the objective of the present study was to investigate temporal variations of pH and EP associated with three different commercially available bleaching gels and the correlation levels between parameters of interest to provide relevant information regarding the kinetics of oxidation reactions in dental bleaching procedures. Methods The study was divided into 3 groups (n = 9) in function of hydrogen peroxide concentration (either 6%, 15% and 35%). The temporal evolution of pH and EP values were determined using a highly-accurate and previously calibrated pH meter at specific time-points (5, 10, 15 and 30 min). Results Data obtained were submitted to one-way ANOVA of repeated measures with Bonferroni post-test (α = 0.05). The results of the study showed difference in the factor gel concentration (p < 0,0001), time (p < 0,0001) and interaction (gel/time) (p = 0.002) while throughout the intervals evaluated the groups remained relatively stable and without significant difference in the intragroup variation of pH (p < 0.05) and in EDP only with significant difference in the 5 min interval of the 35% concentration. A 2nd order polynomial relationship test showed high correlation levels. Conclusion It can thus be concluded that there is a negative relationship between EP and pH variation in the different gel concentrations. Clinical significance The findings of the present study suggest that bleaching gels of higher concentration may provoke BS that are more intense and durable due to significant electric depolarization of neuronal extensions of pulpal tissues. Hydrogen peroxide; Electric potential; pH; Temporal evolution; Dental bleaching. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|