Irrigation and chemical disinfection

Mechanical devices root canal needs to be supported by frequent watering. There are several important goals, such measures:

• Clean up the garbage and dentinal chips and keep the channels wet, so that the instruments will run smoothly.
• Have antibacterial effect.
• To increase the efficiency of equipment, procedures, by dissolution of the necrotic tissue remains, especially in the areas of mechanical devices cannot reach, including cleft, overlapping channels and accessories.
• Dissolve smear layer.

Another desirable property agent will be used is that it should lead to minimal tissue damage and, thus, minimally toxic if it is extruded in the periapical tissues environment. Various irrigation solutions, but none can be said to meet these requirements. In addition, it should be recognized that the effectiveness of agents as they disinfection ability is limited interaction with the dentin, dentin debris and organic compounds present in the root canals necrotic masses, viz. serum proteins and microbial biomass. This means that endodontic disinfecting fectants may not be as powerful as it is noted in studies in vitro (25). Typically used irrigants are sodium hypochlorite (NaOCl) and ethylenediaminetetraacetic acid (EDTA). The special properties of these drugs will be described here in detail...