Effect of Different Surface Treatments for Ceramic Bracket Base on Bond Strength of Rebonded Brackets

Brazilian Dental Journal

Monique Kruger Guarita¹  Alexa Helena Köhler Moresca¹  Estela Maris Losso¹  Alexandre Moro¹  Ricardo Cesar Moresca¹  Gisele Maria Correr¹ 

关键词: orthodontic brackets;    ceramics;    shear bond strength.;   

DOI  :  10.1590/0103-6440201300234

来源: SciELO

【 摘 要 】

The aim of this study was to evaluate the shear bond strength of rebonded ceramic brackets after subjecting the bracket base to different treatments. Seventy-five premolars were selected and randomly distributed into five groups (n=15), according to the type of the bracket surface treatment: I, no treatment, first bonding (control); II, sandblasting with aluminum oxide; III, sandblasting + silane; IV, silica coating + silane; and V, silicatization performed in a laboratory (Rocatec system). The brackets were fixed on an enamel surface with Transbond XT resin without acid etching. The brackets were then removed and their bases were subjected to different treatments. Thereafter, the brackets were fixed again to the enamel surface and the specimens were subjected to shear bond strength (SBS) test. The adhesive remnant index (ARI) was then evaluated for each specimen. Data were subjected to ANOVA and Tukey's tests (α=0.05). A statistically significant difference was observed only between Rocatec and the other groups; the Rocatec group showed the lowest SBS values. The highest SBS values were observed for group 1, without any significant difference from the values for groups II, III and IV. Most groups had a higher percentage of failures at the enamel-resin interface (score 1). It was concluded that the surface treatments of rebonded ceramic brackets were effective, with SBS values similar to that of the control group, except Rocatec group.

【 授权许可】

CC BY   
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