Present status and future directions - irrigants and irrigation methods

Area of Science:

• Endodontics
• Microbiology
• Fluid Dynamics
• Chemistry

Background:

• Root canal irrigation is crucial for cleaning and disinfection.
• Biofilm organization in complex root canal anatomy presents a significant challenge.
• Current irrigation protocols require critical appraisal and future development.

Purpose of the Study:

• To outline obstacles in root canal irrigation.
• To critically evaluate current irrigants and methods.
• To identify knowledge gaps and suggest future research directions.

Main Methods:

• Systematic review of existing literature on root canal irrigation.
• Analysis of irrigant efficacy, delivery systems, and activation techniques.
• Identification of methodological limitations in current studies.

Main Results:

• Sodium hypochlorite remains the primary irrigant, often needing a chelator.
• Syringe and needle delivery with ultrasonic activation are common methods.
• No evidence supports adjunct irrigation methods improving long-term outcomes beyond instrumentation and syringe irrigation.

Conclusions:

• Research priorities need redefinition, focusing on irrigant penetration, biofilm effects, and long-term outcomes.
• Future studies must ensure clinical relevance, robust methodology, and adequate sample sizes.
• Multidisciplinary collaboration is essential for developing improved antimicrobials and activation methods.