Fracture load and shear stress of prefabricated glass fiber posts
Braz. j. oral sci
;
18: e191561, jan.-dez. 2019. ilus
Article
in English
| 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
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Stress, Mechanical
/
Materials Testing
/
Shear Strength
/
Glass
Language:
English
Journal:
Braz. j. oral sci
Journal subject:
Dentistry
Year:
2019
Type:
Article
Affiliation country:
Brazil
/
Italy
Institution/Affiliation country:
Franciscan University/BR
/
University of Bologna/IT
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