A novel noninstrumented technique for cleansing the root canal system

Area of Science:

• Endodontics
• Biomaterials Engineering
• Dental Technology

Background:

• Conventional root canal cleaning relies on mechanical instrumentation, which can be challenging in complex anatomy.
• Effective irrigation and debris removal are crucial for successful endodontic treatment.
• Developing alternative cleaning methods is essential for improving endodontic outcomes.

Purpose of the Study:

• To develop and evaluate a novel machine for cleaning root canals without conventional instruments.
• To assess the efficacy of a cavitation-based device for root canal disinfection.
• To compare the cleaning performance of the new machine with traditional hand instrumentation techniques.

Main Methods:

• A device generating controlled cavitation (microscopic and macroscopic bubbles) under reduced pressure was developed.
• 79 extracted molars (222 root canals) were divided into a control group (hand instrumentation) and test groups (machine instrumentation).
• All groups used sodium hypochlorite (NaOCl) as an irrigant; test groups used varying concentrations (1-3%).

Main Results:

• Machine instrumentation significantly reduced treatment time compared to hand instrumentation.
• Treatment with 2% and 3% NaOCl using the machine resulted in similar or better cleanliness across all root sections.
• The machine demonstrated superior cleaning in the apical third of curved canals compared to hand instrumentation.

Conclusions:

• A non-instrumented, cavitation-based technique can effectively clean root canals.
• The developed machine offers a viable alternative to conventional endodontic instrumentation.
• This technology shows promise for improving root canal cleaning efficiency and effectiveness, particularly in challenging anatomies.