Intratubular Decontamination Ability and Physicochemical Properties of Calcium Hydroxide Pastes

Overview

Journal Clin Oral Investig

Specialty Dentistry

Date 2018 Jul 9

PMID 29982969

Citations 19

Authors

Thais Cristina Pereira

Layla Reginna da Silva Munhoz Vasconcelos

Marcia Sirlene Zardin Graeff

Maria Cristina Marcucci Ribeiro

Marco Antonio Hungaro Duarte

Flaviana Bombarda de Andrade

Affiliations

Soon will be listed here.

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.

Citing Articles

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Calcium silicate-based intracanal medication: Physicochemical properties and effectiveness of techniques for removing medication from the human root canal.

Lopes C, Ferrari Esteves Torres F, Faria G, Sasso-Cerri E, Guerreiro-Tanomaru J, Tanomaru-Filho M Eur Endod J. 2024; 9(4):374-382.

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Bactericidal Effect of Triple Antibiotic Paste against Enterococcus faecalis in Dentinal Tubules: An Ex Vivo Study.

Thasanakit A, Kaewprag J, Srisatjaluk R Eur Endod J. 2024; 9(2):161-166.

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