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Shear bond strength of metallic brackets: an in vitro study
Melo, Téssia Richelly Nóbrega Borja de; Youssef, Michel Nicolau; Ortega, Adriana de Oliveira Lira; Camboim, Fernanda Stella de Oliveira; Costa, Poliana de Santana; Andrade, Ana Cláudia de Macêdo.
  • Melo, Téssia Richelly Nóbrega Borja de; Faculdades Integradas de Patos. Patos. BR
  • Youssef, Michel Nicolau; Universidade Cruzeiro do Sul. São Paulo. BR
  • Ortega, Adriana de Oliveira Lira; Universidade Cruzeiro do Sul. São Paulo. BR
  • Camboim, Fernanda Stella de Oliveira; Faculdades Integradas de Patos. Patos. BR
  • Costa, Poliana de Santana; Faculdades Integradas de Patos. Patos. BR
  • Andrade, Ana Cláudia de Macêdo; s.af
Pesqui. bras. odontopediatria clín. integr ; 15(1): 319-325, 2015. tab, graf
Artículo en Inglés | 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...
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Texto completo: Disponible Índice: LILACS (Américas) Asunto principal: Ortodoncia / Soportes Ortodóncicos / Resinas Compuestas / Resistencia al Corte Límite: Humanos País/Región como asunto: America del Sur / Brasil Idioma: Inglés Revista: Pesqui. bras. odontopediatria clín. integr Asunto de la revista: Odontología Año: 2015 Tipo del documento: Artículo País de afiliación: Brasil Institución/País de afiliación: Faculdades Integradas de Patos/BR / Universidade Cruzeiro do Sul/BR

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Texto completo: Disponible Índice: LILACS (Américas) Asunto principal: Ortodoncia / Soportes Ortodóncicos / Resinas Compuestas / Resistencia al Corte Límite: Humanos País/Región como asunto: America del Sur / Brasil Idioma: Inglés Revista: Pesqui. bras. odontopediatria clín. integr Asunto de la revista: Odontología Año: 2015 Tipo del documento: Artículo País de afiliación: Brasil Institución/País de afiliación: Faculdades Integradas de Patos/BR / Universidade Cruzeiro do Sul/BR