Shear bond strength of metallic brackets: an in vitro study
Pesqui. bras. odontopediatria clín. integr
;
15(1): 319-325, 2015. tab, graf
Artigo
em Inglês
| LILACS
| ID: lil-796377
ABSTRACT
To evaluate in vitro the shear bond strength of metallic brackets.Material and Methods:
Forty premolars were divided into four groups (n = 10) according to the type of brackets used (G1 Morelli® Light; G2 Morelli® Standard; G3 Morelli® Max; G4 Abzil® Agile). For bonding, Transbond XT® (3M Unitek) resin was used in all groups. Teeth were embedded in ¾ inch PVC tubes with special plaster stone, perpendicular to the ground. Brackets were fixed on the geometric centers of the exposed crowns. After bonding, teeth were stored in distilled water, incubated at 37ºC for 24 hours and submitted to 500 thermal cycles for 30 seconds in each bath (5°C and 55°C), respectively. The bond strength test was performed on the Instron® mechanical testing machine with 3kg load cell at speed of 0.5mm/min. Data were submitted to statistical analysis through the Statistica® software, version 5.0, by Kruscal Wallis test, ANOVA and Tukey (p< 0.05).Results:
There was no statistically significant difference in the ARI scores; whereas for shear resistance, this difference was significant (Averages G1 -Light 17.53MPa; G2 -Standard 18.11MPa; G3 -Max 29.33MPa; G4 -Agile 11.37MPa) and G3 showed better performance, compared to the others. All other groups showed similar behavior among themselves.Conclusion:
Max bracket had the highest shear strength. Further studies should be conducted to investigate the meshes of brackets tested in this study...
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Ortodontia
/
Braquetes Ortodônticos
/
Resinas Compostas
/
Resistência ao Cisalhamento
Limite:
Humanos
País/Região como assunto:
América do Sul
/
Brasil
Idioma:
Inglês
Revista:
Pesqui. bras. odontopediatria clín. integr
Assunto da revista:
Odontologia
Ano de publicação:
2015
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Faculdades Integradas de Patos/BR
/
Universidade Cruzeiro do Sul/BR
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