Evaluation of the variation of intrapulpal temperature after the use of bleaching agents and activation by light sources
Journal Title: RSBO - Year 2009, Vol 6, Issue 2
Abstract
Introduction and objective: To evaluate in vitro the degree of warming promoted within the pulp chamber, after the use of bleaching agents, with or without activation by light sources. Material and methods: Sixty bovine teeth were used, which had received access to the root canal by the side lingual, with the wall vestibular standardized at 2 mm. The specimens were divided into 6 groups (n = 10), according to the bleaching agent and the source of activation used: G1 – absence of bleaching agent and application of halogen light; G2 – absence of bleaching agent and application of LED; G3 – application of the Whiteness HP Maxx (35% hydrogen peroxide) and activation with halogen light; G4 – application of Whiteness HP Maxx (35% hydrogen peroxide) and activation with LED; G5 – application of the Opalescence Xtra Boost (38% hydrogen peroxide) and activation with photopolymerizer; G6 – application of the Opalescence Xtra Boost (38% hydrogen peroxide) and activation with LED. The change of temperature in the pulp chamber was measured using a Termopar apparatus. Results: The values of temperature were measured by the device during an interval of 10 minutes, with some selected intervals: t1 – initial temperature; t2 – after 25 seconds of application of the gel and 20 seconds of activation; t3 – after 10 minutes. The values were registered by the machine in the software and the data were subjected to statistical analysis using the Anova test. Conclusion: There were no statistically significant differences between groups with and without activation or between different bleaching.
Authors and Affiliations
Alessandra CARVALHO, Lilian MAEKAWA, Renato PALO, Lafayette NOGUEIRA JUNIOR, Carlos PAVANELLI
Keywords
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