Qualidade das obturações adesivas realizadas com o sistema Resilon/Epiphany SE: análise sob microscopia confocal e ensaio push-out

• Autor(a) principal: Vianna, Gustavo André de Deus Carneiro
• Data de Publicação: 2009
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/14064
• topic: Endodontics; Dentin adhesives; Root canal filling; Push-out bond strength; Confocal microscopy; Endodontia; Adesivos dentinários; Obturação do canal radicular; Resistência ao cisalhamento; Microscopia confocal; CNPQ::CIENCIAS DA SAUDE::ODONTOLOGIA::ENDODONTIA

The present study was designed to assess the quality of adhesive root-fillings performed with the new self-adhesive Epiphany sealer (Epiphany SE). Experiments were performed to evaluate both the quality of the interfacial adaptation between the root-filling and dentinal walls and the bond strength. A sampling of 36 human maxillary canine teeth were used to create three experimental groups: Group 1: root canals obturated with the adhesive root-filling (Resilon/Epiphany); Group 2: root canals obturated with the selfadhesive Epiphany sealer (Resilon/Epiphany SE), and Group 3: root canals obturated with the traditional non-adhesive root-filling (gutta-percha/AH Plus). The teeth were accessed and instrumented in a standardized way, and the root-filling procedures were performed following the manufacturer s recommendations. Four cross-sections were obtained from each root and a standard metallographic preparation was performed to allow the observation of the dentin/root-filling interface through confocal laser scanning microscopic. The interfacial integrity of each sample was calculated by the ratio between the perimeter of the gapcontaining regions and the entire perimeter of the root canal circumference. Subsequently, the same samples were submitted to a push-out test. The quality of the interfacial adaptation was significantly worse (P < 0.05) in both groups of adhesive root-fillings (Kruskall-Wallis test and Dunn s multiple comparison test). Following the same pattern, parametric statistical analysis showed significant lower resistance to the push-out test for both groups of adhesive root-fillings (P < 0.05). In addition, a correlation test revealed a negative correlation between the integrity of the interfacial adaptation and the resistance to the push-out assay. It was possible to conclude that, in general, the quality of the adhesive root-fillings is compromised even when teeth with simple anatomic features were filled under well-controlled laboratorial conditions