Esraa Raad Hussein | Biland M. S. Shukri | Raad H. Ibrahim

This study aims to compare the effectiveness of chitosan nanoparticles (CNPs), citric acid (CA), and ethylenediaminetetraacetic acid (EDTA) in eliminating the smear layer, utilizing two different irrigation needles (IrriFlex® (Produits Dentaires) and ProRinse (Dentsply).

Results indicate that CNPs are as effective as CA and EDTA as a chelating agent, particularly more so apically. Additionally, IrriFlex® outperforms ProRinse® in smear layer removal with EDTA and CA, with no difference notes when used with CNPs. The authors of the article point to IrriFlex’s unique 2 back-to-back side vents and polypropylene material as the main reasons for this superiority, providing excellent reachability and flexibility for improved irrigation.