Resumo

AMANAJAS NETO, Guilherme Pedrosa; PINTO, Welyton Ramon Soares; KLAUTAU, Eliza Burlamaqui  e  ALVES, Bruno Pereira. Pull-out strength of endodontically treated teeth restored with glass fiber posts of different diameters. RGO, Rev. gaúch. odontol. (Online) [online]. 2011, vol.59, n.4, pp. 609-616. ISSN 1981-8637.

Objective To evaluate the pull-out strength of endodontically treated teeth restored with glass fiber posts through different techniques in enlarged conduits. Methods A total of 15 bovine teeth were endodontically treated, divided into three groups. Group 1- restored with number 1 glass fiber posts, Group 2- restored with number 3 glass fiber posts, Group 3- restored with number 3 glass fiber posts associated with accessory glass fiber posts. The pins in all groups were cemented with same self-adhesive resin cement. All test specimens were subjected to the pull-out strength test in the testing machine at a speed of 0.5mm per minute and the results obtained in kilogram-force. Results The pull-out strength values were as follows: group 1 - 24.47 kilograms-force; group 2 - 25.28 kilograms-force; group 3 - 23.59 kilogramsforce. The following standard deviations were observed: 4.33 kilograms-force for group 1, 4.03 kilograms-force for group 2 and 8.39 kilograms-force for group 3. No statistically significant differences between groups were found using the ANOVA test. Conclusion The decrease in the thickness of the cement film by using pins of larger diameter and/or accessories, does not interfere with the retention and stability prediction of the rehabilitation of the complex.

Palavras-chave : Endodontics.; Tensile strength.; Post and core technique..