Eliminação de endotoxinas do interior de canais radiculares por sistemas rotatórios: revisão de literatura

Abstract

Anaerobic Gram-negative bacteria has been isolated from necrotic root canals. These microorganisms have lipopolysaccharide (LPS), endotoxin, in their cell wall which are responsable for their toxic effects. Rotary systems have been increasingly used in chemical-mechanical preparation in Endodontics. The aim of this research was to review the literature about endotoxin removal from inside of root canals using rotary systems. The chemical-mechanical preparation is the essential part of this therapy and has its goal on eliminating bacteria. However, to reach success of the endodontic therapy, chemo-mechanical preparation should also aim endotoxin removal. As an important step forward in Endodontics, we highlight the rotary systems with nickel-titanium. Thanks to its flexibility, excellent cutting ability and stress reduction in long sessions of treatment, they have been widely used. However, it was seen in this research that few studies have evaluated their action on bacterial LPS. In conclusion, the use of rotary instruments with larger diameter of the tip, provides endotoxin removal from the inside of root canal, however, they were not able to reach LPS complete elimination.