Shear bond strength test using different loading conditions: a finite element analysis
Braz. j. oral sci
;
9(4): 439-442, Oct.-Dec. 2010. ilus, tab, graf
Article
in English
| LILACS, BBO
| ID: lil-582274
ABSTRACT
Aim:
This study evaluated the stress distribution at the bond interface during shear bond strength testing for three loading conditions.Methods:
A three-dimensional model was created of a specimen for evaluation by the shear bond strength test, using three cylindrical volumes representing the dentin, adhesive system and composite resin. A linear analysis was performed to calculate the stress distribution at the dentin-adhesive interface. Three models simulating different loading conditions were prepared chisel, orthodontic-looped wire and stainless steel tape.Results:
Chisel presented severe stress concentrations near the loading site (-10681 to 637 MPa). Wire presented stress concentrations along the radial loading axis (-382 to 216 MPa). Tape presented more uniform stress distribution (-83 to 21 MPa).Conclusions:
The loading with stainless steel tape allowed more uniform stress distribution at the bond interface, and was a more reliable way to evaluate the bond with regard to the aim of the shear bond strength test.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Stainless Steel
/
Compressive Strength
/
Shear Strength
/
Dental Stress Analysis
Language:
English
Journal:
Braz. j. oral sci
Journal subject:
Dentistry
Year:
2010
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
State University of Campinas/BR
/
Universitary Nucleus of Pará/BR
/
University of Passo Fundo/BR
/
University of Pernambuco/BR
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