Avaliação da resistência à tração de pinos de fibra de vidro: influência de três agentes cimentantes

• Autor(a) principal: Ferreira, Sheila Peres [UNESP]
• Data de Publicação: 2013
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/149524; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2017-01-27/000857196.pdf
• topic: Pinos dentários; Cimentos de resina; Resistência à tração; Dental pins

The present project was to evaluate the tensile strength of cementation of fiber glass with different cements. For this, bovine teeth were stored in aqueous solution of 2% formaldehyde, pH 7 for 30 days, then scraped with periodontal curettes number 11-12 and cleaned with a jet of sodium bicarbonate and water. Following the teeth were stored in saline solution at 0.9%, which was held to select teeth with straight roots and the like. The teeth were sectioned obtaining root standardized 16 mm, in order to obtain similar dimensions to each other. After selection, the teeth were obturated and their root canals prepared to a depth of 10 mm. After removal procedure, the conduits were prepared according to the manufacturer's recommendations of sealers which: All-Cem (Group 1), Multilink (Group 2) and Rely-X U200 (Group 3). The pins glass fiber were prepared following the protocol: cleaning with phosphoric acid 37% + silane.After cementation of fiber posts and the inclusion of the roots, the samples were subjected to tensile test using a universal testing machine - EMIC - Model DL 3000, regulated the speed of 0.5 mm / min. The values obtained in kilogram force (kgf) were tabulated and subjected to statistical analysis. It was observed that group 2 had a mean tensile strength (45,51 kgf) significantly higher than the average of groups 1 (23.29 kgf) and 3 (15,32 kgf). It can be concluded that the cement Multilink showed higher tensile strength compared to cements All-Cem and Rely-X U200