Mechanical properties of one and two-step fluoridated orthodontic resins submitted to different pH cycling regimes
Braz. oral res
;
24(2): 197-203, Apr.-June 2010. tab, ilus
Artigo
em Inglês
| LILACS
| ID: lil-553915
ABSTRACT
The aim of this study is to assess the in vitro shear bond strength and adhesive remnant index (ARI) of one and two-step fluoridated orthodontic resins under conditions that simulate high cariogenic challenge. Edgewise brackets for maxillary central incisors were randomly bonded to 80 bovine incisors, using either TransbondTM Plus Color Change orthodontic resin and a self-etching primer adhesive (G1; n = 40) or Orthodontic Fill Magic with a conventional acid-etch technique (G2; n = 40). Each group of resin (n = 10) was divided into immediate shear (A- pre-cycling control), immersion in artificial remineralizing saliva (neutral saliva) for 14 days (B- post-cycling control) and pH cycling with high cariogenic challenge (C- acid saliva with pH 5.5 and D- acid saliva with pH 4.5). After 14 days of pH cycling, the shear bond strength and ARI were evaluated. Considering the shear bond strength, TransbondTM Plus Color Change resin was stronger than Orthodontic Fill Magic when it was submitted to high cariogenic challenge (p < 0.05). Also TransbondTM Plus Color Change resin showed better adhesion to enamel than Orthodontic Fill Magic, in all situations evaluated (p < 0.05). It could be concluded that TransbondTM Plus Color Change resin presented better shear bond strength and adhesive remnant index when submitted to high cariogenic challenge, in comparison with Orthodontic Fill Magic.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Técnicas In Vitro
/
Colagem Dentária
/
Bis-Fenol A-Glicidil Metacrilato
/
Resinas Compostas
/
Cimentos de Resina
/
Resistência ao Cisalhamento
Tipo de estudo:
Estudo de etiologia
Limite:
Animais
Idioma:
Inglês
Revista:
Braz. oral res
Assunto da revista:
Odontologia
Ano de publicação:
2010
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Federal University of Rio de Janeiro/BR
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