Morphological analysis of glass, carbon and glass/carbon fiber posts and bonding to self or dual-cured resin luting agents
J. appl. oral sci
;
17(5): 476-480, Sept.-Oct. 2009. ilus, tab
Artigo
em Inglês
| LILACS
| ID: lil-531400
ABSTRACT
OBJECTIVE:
The aim of this study was to evaluate the morphology of glass (GF), carbon (CF) and glass/carbon (G/CF) fiber posts and their bond strength to self or dual-cured resin luting agents. MATERIAL ANDMETHODS:
Morphological analysis of each post type was conducted under scanning electron microscopy (SEM). Bond strength was evaluated by microtensile test after bisecting the posts and re-bonding the two halves with the luting agents. Data were subjected to two-way ANOVA and Tukey's test (α=0.05). Failure modes were evaluated under optical microscopy and SEM.RESULTS:
GF presented wider fibers and higher amount of matrix than CF, and G/CF presented carbon fibers surrounded by glass fibers, and both involved by matrix. For CF and GF, the dual-cured material presented significantly higher (p<0.05) bond strength than the self-cured agent. For the dual agent, CF presented similar bond strength to GF (p>0.05), but higher than that of G/CF (p<0.05). For the self-cured agent, no significant differences (p>0.05) were detected, irrespective of the post type. For GF and G/CF, all failures were considered mixed, while a predominance of adhesive failures was detected for CF.CONCLUSION:
The bonding between fiber posts and luting agents was affected by the type of fibers and polymerization mode of the cement. When no surface treatment of the post is performed, the bonding between glass fiber post and dual-cured agent seems to be more reliable.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Carbono
/
Técnica para Retentor Intrarradicular
/
Colagem Dentária
/
Cimentos de Resina
/
Materiais Dentários
/
Vidro
Limite:
Humanos
Idioma:
Inglês
Revista:
J. appl. oral sci
Assunto da revista:
Odontologia
Ano de publicação:
2009
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
State University of Campinas/BR
/
University of Passo Fundo/BR
/
University of São Paulo/BR
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