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

Abstract

 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