search
for
 About Bioline  All Journals  Testimonials  Membership  News  Donations


Brazilian Journal of Oral Sciences
Piracicaba Dental School - UNICAMP
EISSN: 1677-3225
Vol. 8, No. 2, 2009, pp. 76-80
Bioline Code: os09015
Full paper language: English
Document type: Research Article
Document available free of charge

Brazilian Journal of Oral Sciences, Vol. 8, No. 2, 2009, pp. 76-80

 en Shear bond strength of metallic brackets bonded with a new orthodontic composite
Romano, Fábio Lourenço; Correr, Américo Bortolazzo; Sobrinho, Lourenço Correr; Magnani, Maria Beatriz Borges de Araújo & de Siqueira, Vânia Célia Vieira

Abstract

Aim: The aim of this study was to assess the shear bond strength of orthodontic brackets in different enamel surfaces using the Transbond Plus Color Change composite (TPCC-3M Unitek), and to analyze the Adhesive Remnant Index (ARI).
Methods: Seventy-two human premolars were divided into six groups (n = 12), as follows: Group 1(control) - Transbond XT conventional; in Groups 2 to 6, TPCC was used under the following enamel treatment conditions: phosphoric acid and XT-primer; Transbond Plus Self-Etching Primer (TPSEP); phosphoric acid only; phosphoric acid, XT-primer and saliva; and TPSEP and saliva, respectively. Twenty-four hours after bonding, the brackets were debonded with an Instron machine at a crosshead speed of 0.5 mm/min, and ARI was evaluated by using a stereoscopic magnifying glass.
Results: The mean shear strength values (MPa) for Groups 1 to 6 were 24.6, 18.7, 17.5, 19.7, 17.5 and 14.8, respectively. Data were submitted to ANOVA and Tukey’s test (α = 0.05). Group 1 had significantly higher shear bond strength values than Groups 3, 5, and 6 (p < 0.05), but did not differ significantly from Groups 2 and 4 (p > 0.05). No statistically significant differences (p > 0.05) were found between Groups 2, 3, 4, 5 and 6.
Conclusions: Bracket bonding using TPCC showed adequate adhesion for clinical use, and the type of enamel preparation had no influence.

Keywords
composite resins, shear strength, orthodontic brackets, orthodontics.

 
© Copyright 2009 - Piracicaba Dental School - UNICAMP São Paulo - Brazil
Alternative site location: http://www.fop.unicamp.br/brjorals

Home Faq Resources Email Bioline
© Bioline International, 1989 - 2017, Site last up-dated on 05-Dec-2017.
Site created and maintained by the Reference Center on Environmental Information, CRIA, Brazil
System hosted by the Internet Data Center of Rede Nacional de Ensino e Pesquisa, RNP, Brazil