Influência da temperatura e de substâncias residuais utilizadas no tratamento endodôntico nas propriedades reológicas do cimento endodôntico à base de resina epóxi e do cimento biocerâmico à base de silicone, gutta-percha e vidro bioativo

• Ano de defesa: 2018
• Autor(a) principal: Freitas, Jéssica Vavassori de
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Positivo; Brasil; Pós-Graduação; Programa de Pós-Graduação em Odontologia Clínica; UP
• Palavras-chave em Português: Odontologia; Obturação do canal radicular; Propriedade físicas; Reologia; CNPQ::CIENCIAS DA SAUDE::ODONTOLOGIA
• Link de acesso: https://repositorio.cruzeirodosul.edu.br/handle/123456789/2153

The aim of this study was to evaluate the residual substances deriving from endodontic treatment on rheological properties (setting time and complex viscosity) of epoxy resin-based sealer and silicone, gutta-percha and bioactive glass-based sealer. The tested sealers were GuttaFlow Bioseal (GFB) a silicon-based sealer (Coltene / Whaledent, Langenau, Germany) and AH Plus Jet (AHPJ) an epoxy resin-based sealer (Dentsply DeTrey, Konstanz, Germany). Rheological tests using an Oscillatory Rheometer Physica MCR 301 (Anton Paar, Graz, Austria) were performed to monitor the Storage Module (G') and Energy Loss Module (G") of sealers during setting. The strain amplitude was set at 0.01%, with angular frequency at 10 rad/s and constant temperature at 37°C. To analyze the influence of temperature on sealers properties, the sealers were heated at 80°C for one minute. Endodontic sealers were also analyzed when in contact with sodium hypochlorite 3%, chlorhexidine digluconate 2%, ethylenediaminetetraacetic acid 17% (EDTA), calcium hydroxide, citric acid 40% and distilled water. Each group test was performed five times. Kolmogorov-Smirnov and Two-Way ANOVA were performed to analyze the influence of temperature on sealers properties (p<0.05); Kolmogorov-Smirnov, One-Way ANOVA followed by StudentNewman-Keuls test were performed to analyze the contamination results (p<0.05). GFB results: increasing temperature reduces setting time (24.85±1.38 min vs. 4.45±0.10 min) (p> 0.05) and increases it complex viscosity presa (1.49±0.79 10E6 Pa.s vs. 2.09±0.37 10E6 Pa.s) (p> 0.05); none of the possible contaminants changed it setting time (p> 0.05). GFB in contact with chlorhexidine and calcium hydroxide reduces it complex viscosity (p <0.05). AHPJ: increasing temperature did not affect the setting time (1407.37±34.22 min vs. 1551.53±147.93 min) (p <0.05), but reduces it complex viscosity (6.44±1.37 10E7 Pa.s vs. 4.7±0.41 10E7 Pa.s) (p> 0.05). All contaminants reduced it complex viscosity. Epoxy resin sealers are more sensitive to residual moisture than silicon-based sealers. In addition, the choice of endodontic sealer should be considered according to the obturation technique. Considering that the setting time of the AH Plus has not been altered, this sealer seems resemble to warm filling techniques.