Abstract
Background: Irrigation of the root canal system is an essential step in the endodontic treatment. The aim of this article is to introduce continuous apical negative-pressure ultrasonic irrigation (CANUI), a new irrigation concept, and compare the characteristics of this new technique with current devices for activating the irrigant. Material and Methods: CANUI is designed for cleaning and disinfecting the root canal system. The device consists of a tube inside another tube that allows the continuous ultrasonic exchange of fresh irrigant, as the irrigant is simultaneously aspirated apically. The coronal and apical tubes are 0.75 and 0.3 mm in diameter, respectively. It is composed of a nickel-titanium microcannula suitable for the working length of curved canals. Results: The CANUI technique has the advantages of apical negative pressure (to avoid apical extrusion of the irrigant) and continuous ultrasonic irrigation (continuous refreshment of the irrigant and forced introduction into the canal ramifications). Conclusions: The CANUI technique could improve the irrigation technique of dentists to reach more disinfection in endodontic treatments. Key words:Apical negative pressure, continuous ultrasonic irrigation, irrigation in curved canals, irrigation systems.
Highlights
Root canal infections are typically polymicrobial and involve strong bacterial interactions [1,2,3]
The main goal of endodontic treatment is to eliminate the infected tissue, bacteria and to fill the complex anatomy of the root canal system, in order to allow the healing of a periapical lesion or to prevent the infection of periradicular tissues
The aim of this study is to introduce a device that can activate the irrigant ultrasonically in order to penetrate the canal ramifications effectively; with negative apical pressure to avoid apical extrusion of the irrigant and a nickel-titanium microcannula to transport the irrigant to the working length in curved root canals
Summary
Root canal infections are typically polymicrobial and involve strong bacterial interactions [1,2,3]. In vivo studies show a high cleaning efficiency in areas that are inaccessible via instrumentation [13, 14] This method can transport the irrigant farther than the distance at which the instrument acts, jeopardizing the safety of the procedure with the extrusion of NaOCl into the periapical tissues [15]. The aim of this study is to introduce a device that can activate the irrigant ultrasonically in order to penetrate the canal ramifications effectively; with negative apical pressure to avoid apical extrusion of the irrigant and a nickel-titanium microcannula to transport the irrigant to the working length in curved root canals . The aim of this article is to introduce continuous apical negative-pressure ultrasonic irrigation (CANUI), a new irrigation concept, and compare the characteristics of this new technique with current devices for activating the irrigant. Conclusions: The CANUI technique could improve the irrigation technique of dentists to reach more disinfection in endodontic treatments
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