Effects of different surface treatments on bond strengths of a non-metallic post in root’s canal Dr. Mirzaei M .,1 Dr. Pahlevan A .,2 Dr. Hasani-Tabatabaei M .2 Dr. Abbasi M. 1 1 Assistant Professor, Department of Operative Dentistry , School of Dentistry, Tehran University of Medical Sciences. Tehran , Iran. 2 Associate Professor, Department of Operative Dentistry , School of Dentistry, Tehran University of Medical Sciences. Tehran , Iran. (Received 24 May, 2010 Accepted 12 Jan, 2011) Abstract Background and Aim : 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 debonding 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. Materials and Methods : Fifty extracted human canines or premolars that had just one root canal were endodontically treated. D.T Light Posts (RTD/France) recieved 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 ×). Results : 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. Conclusion : 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 . Key words : Fiber – Post - Quartz-fiber post - Bond strength - Surface treatment Corresponding Author : Dr. Pahlevan A ., Associate Professor, Department of Operative Dentistry , School of Dentistry, Tehran University of Medical Sciences. Tehran , Iran. e.mail: ayoubpahlevan@yahoo.com |
