Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/63861
Type: Artigo de periódico
Title: Effect of different filling materials in combination with intraradicular posts on the resistance to fracture of weakened roots
Author: Marchi, GM
Paulillo, LAMS
Pimenta, LAF
De Lima, FAP
Abstract: The preservation and restoration of severely weakened pulpless teeth is a difficult and relatively unpredictable procedure. This study evaluated the resistance to fracture of experimentally weakened bovine roots internally reconstructed with different filling materials in combination with prefabricated post compared with restored roots that were relatively intact. The roots of 75 mandibular bovine incisors with similar bulks were selected. Of these, 60 were internally prepared to standardized dimensions, thereby simulating weakness. All roots were filled with different restorative materials. The specimens were submitted to the fracture resistance testing with the application of a tangential compressive loading at an angle of 135degrees in relation to the long axes of the roots. Results indicated statistically significant differences in relation to the root conditions. Weakened roots were less resistant to fracture than were controls. The roots restored with the resin cement demonstrated the lowest fracture resistance values, but statistically significant differences were observed only when compared with those restored by the resin-modified glass-ionomer cement. Resin-modified glass-ionomer cement, polyacid-modified resin composite and resin composite behaved similarly without statistically significant differences among them. None of the materials evaluated were capable of achieving the fracture resistance recorded for unweakened controls.
Subject: endodontically treated teeth
weakened roots
morphologic reconstruction
restorative adhesive materials
prefabricated post
resistance to fracture
Country: Inglaterra
Editor: Blackwell Publishing Ltd
Rights: fechado
Identifier DOI: 10.1046/j.1365-2842.2003.00990.x
Date Issue: 2003
Appears in Collections:Unicamp - Artigos e Outros Documentos

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