Comparison of shear bond strength of two self-etch primer/adhesive systems.
Angle Orthod
; 76(1): 123-6, 2006 Jan.
Article
em En
| MEDLINE
| ID: mdl-16448281
ABSTRACT
Orthodontic brackets adhesive systems use three different agents, an enamel conditioner, a primer solution, and an adhesive resin. A unique characteristic of some new bonding systems is that they combine the conditioning, priming, and adhesive agents into a single application. The purpose of this study was to assess and compare the effects of using one-step and two-step self-etch primer/adhesive systems on the shear bond strength of orthodontic brackets. The brackets were bonded to extracted human molars according to one of two protocols. Group I (control) a two-step self-etch acidic primer/adhesive system was used, Transbond Plus was applied to the enamel surface as suggested by the manufacturer. The brackets were bonded with Transbond XT and light cured for 20 seconds. Group II a one-step self-etch, self-adhesive resin cement system, Maxcem, was applied directly to the bracket. The self-etch primer/adhesive is made of two components that mix automatically during application. The brackets were then light cured for 20 seconds. The mean shear bond strength of the two-step acid-etch primer/adhesive was 5.9 +/- 2.7 Mpa and the mean for the one-step system was 3.1 +/- 1.7 MPa. The in vitro findings of this study indicated that the shear bond strengths (t = 3.79) of the two adhesive systems were significantly different (P = .001). One-step adhesive systems could potentially be advantageous for orthodontic purposes if their bond strength can be improved.
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Base de dados:
MEDLINE
Assunto principal:
Condicionamento Ácido do Dente
/
Adesivos
/
Colagem Dentária
/
Braquetes Ortodônticos
/
Cimentos de Resina
/
Dente Molar
Limite:
Humans
Idioma:
En
Revista:
Angle Orthod
Ano de publicação:
2006
Tipo de documento:
Article
País de afiliação:
Estados Unidos