Fracture load and shear stress of prefabricated glass fiber posts
Braz. j. oral sci
;
18: e191561, jan.-dez. 2019. ilus
Artigo
em Inglês
| LILACS, BBO
| ID: biblio-1095303
ABSTRACT
Aim: This study evaluated the fracture load and pattern failure of different prefabricated glass fiber posts (GFPs) of the same diameter. Methods: Seventy-eight (n=13 for six groups) GFPs of 1.6 mm coronal diameter of different brands were evaluated Exacto (Angelus), Power Post (BM4), White Post DC (FGM), HiRem (Overfibers), MAQ (Maquira), and SD (Supordont). The posts were subjected to fracture load testing (45° of inclination and 1 mm/min until fracture). Each factor (load (N) and shear stress (MPa)) was analyzed separately using one-way ANOVA followed by the Tukey test (α=0.05). Results: The type of failure was evaluated on a stereomicroscope (×10). The Power Post samples presented higher values of fracture load (p<0.001) followed by Maquira fiber post, White Post , HiRem, Superpost, and the Exacto posts. The failure pattern observed was intralaminar mode II in-plane shear, such as a failure occur parallel to fibers. Conclusion: Despite the same diameter of GFPs, the fracture load and shear resistance were brand-dependent
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Estresse Mecânico
/
Teste de Materiais
/
Resistência ao Cisalhamento
/
Vidro
Idioma:
Inglês
Revista:
Braz. j. oral sci
Assunto da revista:
Odontologia
Ano de publicação:
2019
Tipo de documento:
Artigo
País de afiliação:
Brasil
/
Itália
Instituição/País de afiliação:
Franciscan University/BR
/
University of Bologna/IT
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