Efeitos sobre as propriedades físico-químicas e atividade antimicrobiana de modificações na composição de um cimento de silicato de cálcio

• Ano de defesa: 2014
• Autor(a) principal: Venção, Ana Carolina [UNESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Calcio; Enterococcus faecalis; Endodontia; Endodontics
• Link de acesso: http://hdl.handle.net/11449/110820

This study evaluated the antimicrobial activity, flow, pH and calcium release of MTA Fillapex (MTAF) (G1) or MTA Fillapex plus 10% in weight of calcium hydroxide powder (CH) (MTAF10) (G2), compared to AH Plus (AP) (G3) and Sealapex (SE) (G4). The flow test was performed according to ISO 6876:2001 requirements. The sealers were placed into plastic tubes and immersed in deionized water. After 24 hours, 7, 14 and 28 days the water of each tube was removed and tested to evaluate the pH values and the level of released calcium. Calcium release values were analyzed statistically by Kruskal Wallis and Dunn tests and antimicrobial activity, pH values and flow were analyzed by ANOVA and Tukey tests (α = 5%). The antimicrobial activity was similar among all groups (p>0.05). G1 presented higher flow among all sealers (p<0.05). The addition of 10% CH into MTAF reduced the flow (p<0.05), but in discordance with ISO requirements. G2 and G4 presented pH values and calcium release higher than G3 (p<0.05), in all periods. G1 presented pH value higher than G3 (p<0.05), except in 7 days period (p>0.05). G4 presented higher pH values than G1 and G2, but the calcium release was similar for all periods (p>0.05). G3 presented lower calcium release among all groups (p<0.05). The addition of 10% calcium hydroxide in MTA Fillapex caused reduction in flow and no negative interference in pH and/or calcium release. The flow obtained does not follow ISO requirements.