Biocorrosive behavior of sulphate-reducing bacteria in kerr endodontic files: Determination of the corrosion.

Aims: This study determined the corrosion rate by mass loss caused by oral strains of sulphate-reducing bacteria (SRB) in Kerr endodontic files (KF), aiming the development of a biopharmaceutical that facilitates the removal of endodontic limb fragments from root canals.

Materials And Methods: Nine new KF were analyzed after immersion in the modified Postgate E culture medium inoculated with oral (84 days), in the consortium (84 days) and environmental (119 days).

Results: Optical microscopy revealed corrosion suggestive areas in all files submitted to immersion in SRB cultures, presenting a statistical difference ( < 0.