Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

In vitro effects of hydrogen peroxide combined with different activators for the in-office bleaching technique on enamel

Full text
Author(s):
Nunes Leite Lima, Debora Alves [1] ; Baggio Aguiar, Flavio Henrique [1] ; Pavesi Pini, Nubia Inocencya [1] ; Silva Soares, Luis Eduardo [2] ; Martin, Airton Abrahao [2] ; Suzy Liporoni, Priscila Christiane [3] ; Bovi Ambrosano, Glaucia Maria [4] ; Lovadino, Jose Roberto [1]
Total Authors: 8
Affiliation:
[1] Univ Estadual Campinas, Dept Restorat Dent, Piracicaba Dent Sch, FOP Unicamp, Piracicaba, SP - Brazil
[2] Vale Paraiba UNIVAP, Lab Biomed Vibrat Scpectroscopy LEVB, Inst Res & Dev, Sao Jose Dos Campos, SP - Brazil
[3] Univ Taubate, Sch Dent, Dept Restorat Dent, Taubate, SP - Brazil
[4] Univ Estadual Campinas, Piracicaba Dent Sch, Dept Social Dent Stat, Airton Abrahao Martin Lab Biomed Vibrat Spect, Piracicaba, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: ACTA ODONTOLOGICA SCANDINAVICA; v. 73, n. 7, p. 516-521, 2015.
Web of Science Citations: 3
Abstract

Objective. The aim of this study was to evaluate the alteration of human enamel bleached with high concentrations of hydrogen peroxide associated with different activators. Materials and methods. Fifty enamel/ dentin blocks (4 x 4 mm) were obtained from human third molars and randomized divided according to the bleaching procedure (n = 10): G1 = 35% hydrogen peroxide (HP -Whiteness HP Maxx); G2 = HP + Halogen lamp (HL); G3 = HP + 7% sodium bicarbonate (SB); G4 = HP + 20% sodium hydroxide (SH); and G5 = 38% hydrogen peroxide (OXB - Opalescence Xtra Boost). The bleaching treatments were performed in three sessions with a 7-day interval between them. The enamel content, before (baseline) and after bleaching, was determined using an FT-Raman spectrometer and was based on the concentration of phosphate, carbonate, and organic matrix. Statistical analysis was performed using two-way ANOVA for repeated measures and Tukey's test. Results. The results showed no significant differences between time of analysis (p = 0.5175) for most treatments and peak areas analyzed; and among bleaching treatments (p = 0.4184). The comparisons during and after bleaching revealed a significant difference in the HP group for the peak areas of carbonate and organic matrix, and for the organic matrix in OXB and HP+ SH groups. Tukey's analysis determined that the difference, peak areas, and the interaction among treatment, time and peak was statistically significant (p < 0.05). Conclusion. The association of activators with hydrogen peroxide was effective in the alteration of enamel, mainly with regards to the organic matrix. (AU)