Fracture strength of flared bovine roots restored with different intraradicular posts

• Autor(a) principal: Clavijo, Victor Grover Rene
• Data de Publicação: 2009
• Outros Autores: Reis, José Maurício dos Santos Nunes, Kabbach, William, Silva, André Luis Faria e, Oliveira Junior, Osmir Batista de, Andrade, Marcelo Ferrarezi de
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Journal of applied oral science (Online)
• DOI: 10.1590/S1678-77572009000600007
• Texto Completo: https://www.revistas.usp.br/jaos/article/view/3740
• topic: Post and core technique; Compressive strength; Prosthodontics

OBJECTIVE: The aim of this study was to evaluate the fracture strength and failure mode of flared bovine roots restored with different intraradicular posts. MATERIAL AND METHODS: Fifty bovine incisors with similar dimensions were selected and their roots were flared until 1.0 mm of dentin wall remained. Next, the roots were allocated into five groups (n=10): GI- cast metal post-and-core; GII- fiber posts plus accessory fiber posts; GIII- direct anatomic post; GIV- indirect anatomic post and GV- control (specimens without intraradicular post). A polyether impression material was used to simulate the periodontal ligament. After periodontal ligament simulation, the specimens were subjected to a compressive load at a crosshead speed of 0.5 mm/min in a servo-hydraulic testing machine (MTS 810) applied at 135º to the long axis of the tooth until failure. The data (N) were subjected to ANOVA and Tukey's post-hoc test (α=0.05). RESULTS: GI and GIV presented higher fracture strength (p;0.05) from GI, GII and GIV. Control specimens (GV) produced the lowest fracture strength mean values (p