Maximizing Endodontic Cleanliness: The Role of Final Irrigation Techniques

Area of Science:

• Endodontics
• Dental Materials Science
• Biomedical Engineering

Background:

• Effective root canal irrigation is crucial for eliminating bacteria and debris in endodontic treatment.
• Complex root canal anatomy limits conventional irrigation efficacy, especially in the apical third and lateral canals.
• Novel irrigation protocols are needed to enhance irrigant delivery and disinfection.

Purpose of the Study:

• To compare the efficacy of four irrigation protocols: Irriflex, EndoActivator (EA), XP Finisher, and XP Finisher R.
• To evaluate irrigant penetration into both the main root canal and accessory lateral canals.
• To determine the optimal irrigation technique for comprehensive root canal disinfection.

Main Methods:

• Twenty-eight single-rooted teeth were randomly assigned to four groups (n=7 each): Irriflex, EA, XP Finisher, and XP Finisher R.
• Artificial lateral canals were created at 2 mm and 4 mm from the apex in each tooth.
• Cone beam computed tomography (CBCT) and retroalveolar imaging were used to assess irrigant penetration.

Main Results:

• A statistically significant difference in main canal penetration was found, with Irriflex showing less penetration than EA, XP Finisher, and XP Finisher R (P < .05).
• No significant difference in lateral canal penetration was observed among the four tested irrigation techniques.
• All tested techniques demonstrated limitations in reaching the created lateral canals.

Conclusions:

• EndoActivator (EA), XP Finisher, and XP Finisher R demonstrated superior main canal irrigant penetration compared to Irriflex.
• Despite improvements in main canal penetration, none of the evaluated techniques significantly outperformed the others in reaching lateral canals.
• Further advancements in irrigation technology are necessary to ensure complete disinfection of complex root canal systems, including lateral canals.