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
Artículo
en Inglés
| 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.
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Acero Inoxidable
/
Fuerza Compresiva
/
Resistencia al Corte
/
Análisis del Estrés Dental
Idioma:
Inglés
Revista:
Braz. j. oral sci
Asunto de la revista:
Odontología
Año:
2010
Tipo del documento:
Artículo
País de afiliación:
Brasil
Institución/País de afiliación:
State University of Campinas/BR
/
Universitary Nucleus of Pará/BR
/
University of Passo Fundo/BR
/
University of Pernambuco/BR
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