Influência da técnica de obturação dos canais radiculares e do cimento endodôntico na força de adesão de pinos pré-fabricados de fibra de vidro

• Autor(a) principal: Campos, Luis Claudio
• Data de Publicação: 2014
• 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/1/13944
• topic: Bond strength; Endodontic sealer; Obturation techinique; Fiber post; Push out test; Força de adesão; Cimentos endodônticos; Técnicas de obturação; Pinos de fibra; Teste push out; CNPQ::CIENCIAS DA SAUDE::ODONTOLOGIA

To compare the adhesion strength by push out test of fiberglass intracanal posts filled with Pulp Canal Sealer EWT ® and AHPlus® sealers the techniques of cold lateral compaction and continuous wave of condensation. Sixty roots of mandibular molars were selected and randomly distributed into 04 groups with 15 sample each: Group I, cold lateral compaction technique of gutta-percha associated with Pulp Canal Sealer EWT ® cement, Group II, cold lateral compaction technique of gutta-percha associated with AHPlus®, Group III, continuous wave of condensation technique of gutta-percha associated with cement Pulp Canal Sealer EWT ®; group IV - continuous wave of condensation technique associated with AHPlus®. The Fibreglass Whitepost pin DC® 0.5 was cemented with an adhesive system and the AMBAR® AllCEM® cement 1:1 in all roots. Push out test were performed at three different levels: cervical, middle and apical in a universal testing machine EMIC DL 200 MF at a speed of 1.0 mm / min until fracture. To analyze the results, the Kruskal- Wallis, Bonferroni and Wilcoxon tests were used. The four study groups were significantly different in respect to the bond strength of the push out test (p < 0.000), and the groups III and IV had greater force of resistance followed by groups II and I. In paired analyzes, there was no statistically significant difference only between groups I and II (p = 0.075) and between groups III and IV (p = 0.052) . When the push out of the groups was compared by thirds, cervical , middle and apical thirds of groups III and IV were significantly higher than groups I and II (p = 0.00, for all comparisons) . Comparing the bond strength within each group, the maximum push out force in group IV was significantly higher in his cervical third when compared to the middle third (p = 0.017), but there was no difference between the middle and apical thirds. In the other three groups, there was no push out difference between the thirds. The technique of filling of the root canals continuous wave of condensation, was superior to the technique of cold lateral compaction of gutta - percha on the application of shear force (push out) . The type of root canal sealer had no influence on the push out ultimate strength of the fiber pin.