Shear bond strength of a new self-adhering flowable composite resin for lithium disilicate-reinforced CAD/CAM ceramic material
The Journal of Advanced Prosthodontics
;
: 434-443, 2014.
Artigo
em Inglês
| WPRIM
| ID: wpr-99032
ABSTRACT
PURPOSE:
The purpose of this study was to evaluate and compare the effects of different surface pretreatment techniques on the surface roughness and shear bond strength of a new self-adhering flowable composite resin for use with lithium disilicate-reinforced CAD/CAM ceramic material. MATERIALS ANDMETHODS:
A total of one hundred thirty lithium disilicate CAD/CAM ceramic plates with dimensions of 6 mm x 4 mm and 3 mm thick were prepared. Specimens were then assigned into five groups (n=26) as follows untreated control, coating with 30 microm silica oxide particles (Cojet(TM) Sand), 9.6% hydrofluoric acid etching, ErYAG laser irradiation, and grinding with a high-speed fine diamond bur. A self-adhering flowable composite resin (Vertise Flow) was applied onto the pre-treated ceramic plates using the Ultradent shear bond Teflon mold system. Surface roughness was measured by atomic force microscopy. Shear bond strength test were performed using a universal testing machine at a crosshead speed of 1 mm/min. Surface roughness data were analyzed by one-way ANOVA and the Tukey HSD tests. Shear bond strength test values were analyzed by Kruskal-Wallis and Mann-Whitney U tests at alpha=.05.RESULTS:
Hydrofluoric acid etching and grinding with high-speed fine diamond bur produced significantly higher surface roughness than the other pretreatment groups (P<.05). Hydrofluoric acid etching and silica coating yielded the highest shear bond strength values (P<.001).CONCLUSION:
Self-adhering flowable composite resin used as repair composite resin exhibited very low bond strength irrespective of the surface pretreatments used.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Politetrafluoretileno
/
Cerâmica
/
Dióxido de Silício
/
Microscopia de Força Atômica
/
Instrumentos Odontológicos
/
Fungos
/
Ácido Fluorídrico
/
Lítio
Idioma:
Inglês
Revista:
The Journal of Advanced Prosthodontics
Ano de publicação:
2014
Tipo de documento:
Artigo
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