Effect of preheating on cytotoxicity and physicochemical properties of light-cured calcium-based cements.

Autor:	Borghetti DL; Universidade Luterana do Brasil, Departamento de Dentística, Canoas, Rio Grande do Sul, Brasil., Zimmer R; Universidade Luterana do Brasil, Departamento de Dentística, Canoas, Rio Grande do Sul, Brasil. beto.zimmer@hotmail.com., Portella FF; Universidade Feevale, Instituto de Ciências da Saúde, Novo Hamburgo, Rio Grande do Sul, Brasil., Reston EG; Universidade Luterana do Brasil, Departamento de Dentística, Canoas, Rio Grande do Sul, Brasil., Klein-Junior CA; Universidade Luterana do Brasil, Departamento de Dentística, Canoas, Rio Grande do Sul, Brasil., Marinowic DR; Pontifícia Universidade Católica do Rio Grande do Sul, Instituto do Cérebro, Porto Alegre, Rio Grande do Sul, Brasil., Hosaka K; Tokyo Medical and Dental University, Department of Oral Health Science, School of Medical and Dental Science, Tokyo, Japan.
Jazyk:	angličtina
Zdroj:	Acta odontologica latinoamericana : AOL [Acta Odontol Latinoam] 2020 Sep 01; Vol. 33 (2), pp. 82-89.
Abstrakt:	The aim of this study was to evaluate the degree of conversion, cytotoxicity, solubility and pH of photopolymerizable calciumbased cements submitted to preheating. The degree of conversion was analyzed by Fourier transform infrared, cytotoxicity by the MTT test and solubility through loss of mass. The data were subjected to statistical tests (ANOVA / Tukey's, p<0.05). The photopolymerizable materials showed a low degree of conversion, regardless of preheating. All materials caused a reduction in cell viability at 24 hours and 7 days, with the Dycal (control) being more cytotoxic. Heat had a positive effect on Biocal at 7 days. Dycal is the most soluble material. Heat had no effect on the solubility or pH of the polymerizable materials. It is concluded that photopolymerizable calcium-based cements have a low degree of conversion and are soluble, which results in mild to moderate cytotoxicity. Competing Interests: none (Sociedad Argentina de Investigación Odontológica.)
Databáze:	MEDLINE
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