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Micro-shear bond strength and surface micromorphology of a feldspathic ceramic treated with different cleaning methods after hydrofluoric acid etching
STEINHAUSER, Henrique Caballero; TURSSI, Cecilia Pedroso; FRANCA, Fabiana Mantovani Gomes; AMARAL, Flavia Lucisano Botelho do; BASTING, Roberta Tarkany.
  • STEINHAUSER, Henrique Caballero; Imperatriz School of Dentistry. Imperatriz. BR
  • TURSSI, Cecilia Pedroso; Imperatriz School of Dentistry. Imperatriz. BR
  • FRANCA, Fabiana Mantovani Gomes; Imperatriz School of Dentistry. Imperatriz. BR
  • AMARAL, Flavia Lucisano Botelho do; Imperatriz School of Dentistry. Imperatriz. BR
  • BASTING, Roberta Tarkany; Imperatriz School of Dentistry. Imperatriz. BR
J. appl. oral sci ; 22(2): 85-90, Mar-Apr/2014. tab, graf
Artigo em Inglês | LILACS, BBO | ID: lil-704193
ABSTRACT

Objective:

The aim of this study was to evaluate the effect of feldspathic ceramic surface cleaning on micro-shear bond strength and ceramic surface morphology. Material and

Methods:

Forty discs of feldspathic ceramic were prepared and etched with 10% hydrofluoric acid for 2 minutes. The discs were randomly distributed into five groups (n=8) C no treatment, S water spray + air drying for 1 minute, US immersion in ultrasonic bath for 5 minutes, F etching with 37% phosphoric acid for 1 minute, followed by 1-minute rinse, F+US etching with 37% phosphoric acid for 1 minute, 1-minute rinse and ultrasonic bath for 5 minutes. Composite cylinders were bonded to the discs following application of silane and hydrophobic adhesive for micro-shear bond strength testing in a universal testing machine at 0.5 mm/min crosshead speed until failure. Stereomicroscopy was used to classify failure type. Surface micromorphology of each treatment type was evaluated by scanning electron microscopy at 500 and 2,500 times magnification.

Results:

One-way ANOVA test showed no significant difference between treatments (p=0.3197) and the most common failure types were cohesive resin cohesion followed by adhesive failure. Micro-shear bond strength of the feldspathic ceramic substrate to the adhesive system was not influenced by the different surface cleaning techniques. Absence of or less residue was observed after etching with hydrofluoric acid for the groups US and F+US.

Conclusions:

Combining ceramic cleaning techniques with hydrofluoric acid etching did not affect ceramic bond strength, whereas, when cleaning was associated with ultrasound, less residue was observed. .
Assuntos


Texto completo: DisponíveL Índice: LILACS (Américas) Assunto principal: Condicionamento Ácido do Dente / Cerâmica / Colagem Dentária / Compostos de Potássio / Silicatos de Alumínio / Ácido Fluorídrico Tipo de estudo: Estudos de avaliação Idioma: Inglês Revista: J. appl. oral sci Assunto da revista: Odontologia Ano de publicação: 2014 Tipo de documento: Artigo País de afiliação: Brasil Instituição/País de afiliação: Imperatriz School of Dentistry/BR

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Texto completo: DisponíveL Índice: LILACS (Américas) Assunto principal: Condicionamento Ácido do Dente / Cerâmica / Colagem Dentária / Compostos de Potássio / Silicatos de Alumínio / Ácido Fluorídrico Tipo de estudo: Estudos de avaliação Idioma: Inglês Revista: J. appl. oral sci Assunto da revista: Odontologia Ano de publicação: 2014 Tipo de documento: Artigo País de afiliação: Brasil Instituição/País de afiliação: Imperatriz School of Dentistry/BR