[Effects of different surface treatments on bond strengths of a non-metallic post in root's canal]

ABSTRACT

The establishment of reliable bonds at root-post-core interfaces is critical for the clinical success of post retained restorations. Severe stress concentration at post-cement interface increases the probability of post depending from the root. The aim of this study was to investigate the effects of different surface treatments on bond strengths of a non-metallic post in the root. Fifty extracted human canines or premolars that had just one root canal were endodontically treated. D.T Light Posts [RTD/France] received surface treatments in five categories 1] Application of silane. 2] Sandblast with Alumina particles. 3] Sandblast with Alumina particles+ application of silane. 4] Etching with hydrofluoric acid+ application of silane. The posts were cemented in roots using panavia F 2.0 resin cement. A push-out test was performed on three different sections of each root to measure bond strengths. Data were analyzed with ANOVA and Post hoc tests at P<0.05. Failure modes were observed under a stereomicroscope [10]. Surface treatments used in this study [silane application, sandblast, sandblast+ silane, HF etching+ silane] did not increase the push-out bond strengths of fiber post used in this study. [P>0.05]. The most failures in different groups of surface treatments occurred at the cement material-post interface. The use of silane, sandblast method and etching with HF did not increase the push-out bond strength of fiber post used in this study