Bárbara Rebeca De Brito Alves, Iris Bincelli Seckler, Marília F V Marceliano-Alves, Ana Grasiela Limoeiro, Élida Boaventura Mendes, Aida Meto, Alyne Rouse Rocha, Ana Paula Fonseca De Almeida, Ricardo Tadeu Lopes, Marcos Frozoni
European Endodontic Journal - 2026;11(4):150-157
This study evaluated the efficiency of 3 types of irrigation needles in removing debris during the preparation of mesial canals in mandibular molars with Vertucci Class 2 configuration and type 3 isthmus. Thirty samples were analysed using Micro-computed tomography (Micro-CT) and divided into 3 groups based on the needle type: Group OA (open-tip Navitip needle), Group CFSL (closed-tip needle with single lateral opening) and Group CFSLD (closed-tip needle with double lateral openings). Biomechanical preparation was carried out with Logic 30.03 files and 5.25% sodium hypochlorite, followed by final irrigation with 17% EDTA and saline solution. Micro-CT scans quantified residual debris in the main canal and isthmus. Open-tip needles were significantly more effective in cleaning the isthmus region than closed-tip needles (P = .007), although no differences among needle types were observed in the main canals (P = .717). The study concludes that needle design impacts debris-removal efficiency in root canal systems.
