Utilização da ativação ultrassônica de agentes de limpeza na cimentação adesiva de pinos intrarradiculares

• Autor(a) principal: Antunes Neto, Saul
• Data de Publicação: 2012
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/14079
• topic: Smear layer; Adhesiveness; Post and Core Tecnique; EDTA; Ultrasonic Activation; Lama dentinária; Adesividade; Técnica para retentor intrarradicular; EDTA; Ativação ultrassônica; CNPQ::CIENCIAS DA SAUDE::ODONTOLOGIA

The aim of this study was to evaluate the effect of ultrasonic tip use as a root canal cleaning agents activator during the preparation of the dentin substrate for fiber glass posts cementation with self-etching self-adhesive dual-curing cement. 40 single-rooted human teeth had their canals treated. The roots were embedded in polyester resin and prepared in a standardized manner. The specimens were then divided into four experimental groups G1 2,5% NaOCl for 60s treatment, G2 - 2.5% NaOCl + activation by ultrasound (US) for 60s treatment, G3 - 17% EDTA for 60s and G4 - 17% ethylenediaminetetraacetic acid (EDTA) + activation by ultrasound for 60 seconds treatment. Fiber glass posts were cemented with self-etching self adhesive dual-curing cement. After 48 hours, the roots were sectioned into 1 mm slices approximately, subjected to push-out test, and the data analyzed statistically. The Student´s t test showed no significant difference between 2.5% NaOCl and 17% EDTA use (p = 0,916). The Student´s t test also showed that the ultrasound use does not change this condition and the results were similar p = 0.288. analysis of variance (ANOVA) and Student-Newman-Keuls (SNK) multiple comparisons tests were applied to each of the thirds. The result for the cervical third showed that all groups differed among themselves but group 4 compared to group 2; for the middle third of the test revealed that all groups differed among themselves but group 1 compared to group 3 and for the apical third the groups comparisons were different but group 3 compared to group 1 and group 2 compared to group 4. According to the methodology employed in this study It is concluded the use of ultrasonic activation did not improve the bond strength of the self etching, self adhesive dual-cure resin cement seT PP and that the use of ultrasonic activation was not able to promote more homogeneous and intact hybrid zones.