The Effect of Different Irrigating Solutions on the Bond Strength of an Innovative Activ GP Root Canal-Filling System

Abstract

Background: The success of non surgical root canal therapy depends on thorough cleaning and shaping of the root canal system followed by three-dimensional obturation that provides complete sealing of canal.

Objectives: The bond strength of ActiV GP root canal filling system when used after final rinse with different irrigation protocols was evaluated in this study.

Materials and Methods: Twenty roots were randomly divided into four groups (n =5) according to  initial irrigation 5 ml 3% NaOCl followed by 0.9% saline and the final irrigation regimen: group 1, 5 ml 17% EDTA; group 2, 5 ml MTAD; group 3, 5 ml of 2% CHX; and group 4, 5 ml Distilled Water . In each group the root canals were filled using the ActiV GP obturation system. Two-millimeter thick horizontal sections from the coronal and mid thirds of each root were sliced for the push-out bond strength measurement.

Results: NaOCl/CHX (3.442±0.226MPa) yielded significantly the highest mean bond strength value. The significantly lowest bond strength was recorded for NaOCl/Distilled Water (1.483±0.179MPa).

Conclusion: It was concluded that the bond strength of ActiV GP was improved by using 2% CHX as the final irrigant.