[A scanning electron microscope study comparing the cleansing effect of the irrigating solutions and irrigating...

Area of Science:

• Endodontics
• Dental Materials Science
• Microscopy

Background:

• Effective cleaning of the root canal system is crucial for successful endodontic treatment.
• The smear layer and debris removal are significant challenges in root canal preparation.
• Various irrigating solutions and delivery systems are employed to enhance canal cleanliness.

Purpose of the Study:

• To compare the efficacy of different irrigating solutions and delivery systems in removing debris and smear layer from instrumented root canals.
• To evaluate the cleaning effectiveness at the cervical, middle, and apical thirds of the root canal.

Main Methods:

• 20 single-rooted teeth were instrumented and divided into four groups.
• Groups were irrigated with sterile saline, hydrogen peroxide (H2O2) and sodium hypochlorite (NaOCl) via syringe, H2O2 and NaOCl via ENAC, or ethylenediamine tetraacetic acid (EDTA) and NaOCl via Endo-mate.
• Scanning electron microscopy (SEM) was used to assess the cleaning effect.

Main Results:

• The Endo-mate system with EDTA and NaOCl demonstrated superior cleaning in the cervical and middle thirds.
• No significant difference in cleaning efficacy was observed among the tested irrigating solutions and systems in the apical third.
• The apical third remained challenging to clean effectively irrespective of the irrigation protocol.

Conclusions:

• The Endo-mate device combined with EDTA and NaOCl is highly effective for cleaning coronal and middle root canal sections.
• Achieving complete debris and smear layer removal in the apical third remains a challenge for current endodontic irrigation techniques.
• Further research into advanced irrigation strategies is warranted to improve apical canal cleaning.