Effects of Irrigation Type on Push-Out Bond Strength of Carbon Post

Method: Eight single-rooted human maxillary teeth were divided into two groups. The roots were endodontically treated and post-cavity preparation was 1.2 mm in diameter and 10 mm in depth. In group 1, roots were irrigated with 5.25% NaOCl for 3 minutes and % 0.2 chitosan solution for 3 minutes followed by 3 minutes distilled water, whereas in group 2, 5.25% NaOCl for 3 minutes and % 17 EDTA for 3 minutes followed by 3 minutes distilled water were used. Carbopost (Carbotech, France) was cemented with RelyX Unicem resin cement (3M ESPE, St Paul, MN). Bonded specimens were cut into 1-mm-thick sections, and push-out tests were performed using a universal testing machine. Data were calculated as MPa and analyzed (Kruskal-Wallis) (P=0.05).

Result: For both irrigation protocol, the carbon fiber post, adhesively cemented with resin cement, exhibited similar mean bond strength values (P>0.05).

Conclusion: Post-spaces finally irrigated with either EDTA or Chitosan cemented with resin cement can alter the push-out bond strength of carbon fiber post.