Brazilian Journal of Oral Sciences
Piracicaba Dental School - UNICAMP
Vol. 8, No. 1, 2009, pp. 34-37
Bioline Code: os09007
Full paper language: English
Document type: Research Article
Document available free of charge
Brazilian Journal of Oral Sciences, Vol. 8, No. 1, 2009, pp. 34-37
© Copyright 2009 - Piracicaba Dental School - UNICAMP São Paulo - Brazil
Shear bond strength of a new composite for orthodontic use under different situations|
Pithon, Matheus Melo & dos Santos, Rogério Lacerda
The aim of this study was to evaluate the shear bond strength of metallic orthodontic brackets bonded with Eagle Bond composite under different enamel surface conditions.
Ninety bovine permanent lower incisors were divided into six groups (n = 15). In Group 1 (control) and Group 2 the brackets were bonded with XT primer/Transbond XT composite (3M Unitek) and Eagle Bond primer/Eagle Bond composite (American Orthodontic), respectively, according to the manufacturers’ recommendations. In the other groups, the brackets were bonded with Eagle Bond composite as follows: Group 3 had an enamel surface treated with Transbond Plus Self-Etching Primer; Group 4, bonding without application of Eagle Bond primer; Group 5, use of homogenized Eagle Bond composite; and Group 6, Eagle Bond primer/Eagle Bond composite applied on saliva/blood-contaminated dental surface. After bonding of the brackets, all specimens were tested in shear strength in an Emic universal testing machine at a crosshead speed of 0.5 mm/min.
There were no statistically significant differences among the groups (p > 0.05). A larger number of fractures were detected at the bracket/composite interface by the analyses of the Adhesive Remnant Index scores.
It may be concluded that the modifications on the enamel surface did not compromise the shear bond strength of the composite Eagle Bond.
shear strength, dental bonding, orthodontic brackets
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