Shear bond strength measurement of different root canal sealers to gutta percha

Abstract EN

Background : Bond strength of root canal sealers to gutta-percha is an important property for the integrity of sealing of root canals.

The purpose of this study was to measure the shear bond strength of contemporary commercially available endodontic sealers to gutta-percha.

Materials and Methods : Forty disks of gutta-percha with a diameter of 10 mm and thickness of 4 mm were made by softening gutta-percha cones and then fixed with plaster in 1-inch phenol rings.

Five-millimeter long sections of polyethylene tubing, filled with freshly mixed sealer, were placed on the gutta-percha and tested for shearing bond strength after setting.

A custom made holder was attached to the rings and placed in a testing machine, which was activated at a cross-arm speed of 0.5 mm per minute.

Results : The bond strength of different sealers to gutta-percha ranged from 0.92 MPa to 8.17 MPa.

Conclusion : The Epoxy resin sealer exhibited the highest bonding with gutta-percha under the shearing force.