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Published in:

01-03-2019 | Original Article

Intratubular decontamination ability and physicochemical properties of calcium hydroxide pastes

Authors: Thais Cristina Pereira, Layla Reginna da Silva Munhoz Vasconcelos, Márcia Sirlene Zardin Graeff, Maria Cristina Marcucci Ribeiro, Marco Antonio Hungaro Duarte, Flaviana Bombarda de Andrade

Published in: Clinical Oral Investigations | Issue 3/2019

Abstract

Objective

This in vitro study compared the penetration, pH, calcium ion release, solubility, and intradentinal decontamination capacity of calcium hydroxide (CH) pastes with different vehicles and additives.

Materials and methods

Infected standard bovine dentine contaminated with Enterococcus faecalis were treated with propolis extract, chlorhexidine, and camphorated paramonochlorophenol (CPMC) loaded in CH paste for the bacterial viability evaluation made by confocal laser scanning microscopy (CLSM) and microbiological culture. Beside this, 50 acrylic teeth were filled with the previously mentioned pastes to evaluate the pH and calcium ion release (pHmeter and atomic absorption spectrophotometer at time intervals of 7, 15, and 30 days) and solubility (micro-computed tomographic imaging before and after 15 days).

Results

After treatment, all samples decreased intra-dentinal contamination, specially, the CH paste with CPMC. There was no statistically significant difference between the groups when evaluating the intra-canal paste penetration. In the pH measurements, CH with distilled water showed the smallest pH values. Regardless the solubility percentage of the pastes, the paste of CH + PG presented the highest values.

Conclusion

The vehicles and additives tested may increase CH antimicrobial effect, but with small differences. In general, all CH pastes tested here were effective in reducing Enterococcus faecalis and were similar in the penetration, pH, calcium ion release, and solubility of calcium hydroxide when compared to distilled water.

Clinical relevance

The use of calcium hydroxide pastes as intracanal medication with an aqueous or viscous vehicle, as propylene glycol, can be useful, since all formulations of the tested pastes resulted in great bacterial reduction inside root canals.

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Title: Intratubular decontamination ability and physicochemical properties of calcium hydroxide pastes
Authors: Thais Cristina Pereira
Layla Reginna da Silva Munhoz Vasconcelos
Márcia Sirlene Zardin Graeff
Maria Cristina Marcucci Ribeiro
Marco Antonio Hungaro Duarte
Flaviana Bombarda de Andrade
Publication date: 01-03-2019
Publisher: Springer Berlin Heidelberg
Published in: Clinical Oral Investigations / Issue 3/2019
Print ISSN: 1432-6981
Electronic ISSN: 1436-3771
DOI: https://doi.org/10.1007/s00784-018-2549-0

At a glance: The STEP trials

Springer Medicine

Intratubular decontamination ability and physicochemical properties of calcium hydroxide pastes

Abstract

Objective

Materials and methods

Results

Conclusion

Clinical relevance

At a glance: The STEP trials

Springer Medicine

Abstract

Objective

Materials and methods

Results

Conclusion

Clinical relevance

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