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Physicochemical properties and antimicrobial activity of calcium hydroxide pastes in association with other compounds
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Keywords

Anti-infective agents
Biofilms
Calcium hydroxide
Root canal filling materials
Chemical phenomena

How to Cite

1.
Borges MMB, Frank MC, Zancan RF, Tartari T, Vivan RR, Duarte MAH. Physicochemical properties and antimicrobial activity of calcium hydroxide pastes in association with other compounds. Braz. J. Oral Sci. [Internet]. 2021 Jul. 19 [cited 2024 Jun. 16];20(00):e212098. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8662098

Abstract

Aim: This study aimed to evaluate the pH, Ca2+ release, solubility, and antimicrobial activity of calcium hydroxide (Ca(OH)2) pastes in association with different substances. Methods: Sixty acrylic teeth (n=10) were filled with pastes that associated Ca(OH)2 with the following substances: benzalkonium chloride 5% (G1) and 50% (G2) both in propylene glycol, arnica glycolic extract (G3), green tea glycolic extract (G4), Calen/PMCC™ (G5), and Calen™ (G6). In the group G1 to G4 were used 1g of Ca(OH)2 powder with 0,8g of vehicle. pH and Ca2+ release was measured after 7, 15, and 30 days. For solubility, micro-CT was used immediately and at the periods of 7, 15, and 30 days. For the antimicrobial analysis, a biofilm of E. faecalis was induced in vitro on bovine dentin discs. Live/dead viability dye and confocal scanning microscopy were used. Results: The highest pH values occurred on the first 7 days, and the G6, G1, G3, and G5 presented the highest pH values at this period (P <0.05). Ca2+ release was higher in all groups at 7 days, with the highest values observed in G1, G5, and G6. The volume of all pastes showed no significant difference in the intragroup analysis at 7 and 15 days (P <0.05). G1 and G2 showed the highest antimicrobial action (P <0.05). For the biovolume, there was difference between the G6 and the other groups (P >0.05) with G1 presenting the lowest values. Conclusion: Benzalkonium chloride 5% increases the antimicrobial action of the Ca(OH2), without impairs physicochemical properties.

https://doi.org/10.20396/bjos.v20i00.8662098
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