关键词: 动能冲洗, 被动超声冲洗, 声波, 激光激活冲洗

Abstract: The removal of pulp tissue，microorganisms，toxins and necrotic residue from the root canal system is critical to the success of root canal therapy. However due to the complex anatomical structure of root canal system，such as isthmus and lateral root canal，the root canal cannot be completely shaped and cleaned. Mechanical preparation may form a smear layer on the root canal wall. The tissue debris，microorganisms，toxins and necrotic residue may remain in the complex anatomical structure，which can lead to persistent periapical inflammation. Therefore，mechanical preparation alone cannot achieve the ideal cleaning effect，it also needs to be combined with root canal irrigation. Root canal irrigation is the important part of the root canal cleaning；however，in traditional root canal irrigation，the penetration of irrigant is limited. To improve the efficacy，flow and distribution of irrigating solutions within root canals，different activated irrigations were suggested. In this paper，the purpose and characteristics of irrigation，activated irrigation and its application strategy were introduced.

Key words: activated irrigation, passive ultrasonic irrigation, sonic, laser-activated irrigation