Evaluation of extraradicular pH after intracoronal bleaching using four bleaching agents
DOI:
https://doi.org/10.14295/bds.2009.v12i2.331Abstract
The present in vitro study evaluated the pH values of extraradicular medium after intracoronal bleaching with 30% hydrogen peroxide or 10% carbamide peroxide and different associations of sodium perborate. The study was composed of 50 extracted human premolars, randomly divided into five groups, according to the bleaching agent employed for intracoronal bleaching of these teeth: a) distilled water; b) sodium perborate with distilled water (2g/ml); c) sodium perborate with 10% carbamide peroxide (2g/ml); d) sodium perborate with 30% hydrogen peroxide (2g/ml); e) 30% hydrogen peroxide. Coronal access was performed, followed by root canal filling, confection of a cervical intermediate base with resin-modified glass ionomer cement (Vitremer-3M/ESPE) and application of the bleaching agents. The teeth were stored in plastic flasks containing distilled water, using a mechanical device. Measurement of pH of the extraradicular medium (distilled water) was performed immediately and 7 days after insertion of the bleaching agents. The pH values were analysed using the two-way ANOVA and Tukey,s test at significance level of 5%. The results of the present study confirmed the alkalinity of associations of sodium perborate and the acidity of 30% hydrogen peroxide at the immediate period. Considering the results achieved, it can be concluded that the bleaching agents employed changed the pH of the extraradicular medium at 7-day period.
Downloads
Published
Issue
Section
License
COPYRIGHT TRANSFER AND RESPONSIBILITY STATEMENT
(PDF | Word)
All manuscript's copyright ownership of the article "____________________________________________________________________" is transferred from the author(s) to the BRAZILIAN DENTAL SCIENCE, in the event the work is published. The manuscript has not been published elsewhere and that it has not been submitted simultaneously for publication elsewhere.
We hereby attest the study is original and does not present manipulated data, fraud or plagiarism. We made significant scientific contribution to the study and we are aware of the presented data and in agreement with the final version of the manuscript. We assume complete responsibility for the ethical aspects of the study.
This text must be printed and signed by all authors. The scanned version should be submitted as supplemental file during the submission process.