Comparative Evaluation of the Effect of XP-Endo Finisher, Passive Ultrasonic Irrigation and Sonic Activation on the Push-Out Bond Strength of Bioceramic Sealer to Root Dentin

Abstract

Complexities of root canal system necessitate the use of irrigation along with their activation to achieve complete cleaning. Common methods include sonic and ultrasonic activation of the irrigants. A newer rotary file system, XP-Endofinisher has the advantage of elliptical movement resulting in efficient cleaning. 24 single canalled maxillary anterior teeth were selected and divided into 3 groups, Group 1- XP (n=12), Group 2- PUI (n=12), Group 3 – Endoactivator (n=12). All samples were prepared with Protaper Universal files and irrigated with 5.25% sodium hypochlorite & 17% EDTA. In Group 1- XP-Endofinisher at 800rpm for 1 min; Group 2- i-SuperTip in EMS scaler for 1 min; Group 3- Endoactivator for 1 min. Specimens were filled with Cerafill and then sectioned horizontally with a water-cooled diamond saw at depths of 4, 7 and 10mm to produce 1mm slices. POBS was performed, bond strength in MPa was obtained after dividing the load at failure by the area of the bonded interface. POBS of Cerafill to root dentin of Group 1 was significantly more than that of Group 2 and 3 (p≤0.05) at all three levels. Group 2 was better than 3 at all levels but difference was not significant. In Group 1, POBS was significantly more at 4mm compared to 7mm and 10mm (p≤0.05). Use of XP- Endo Finisher after biomechanical preparation improves the POBS of bioceramic based sealer to root dentin at 4, 7 and 10mm. POBS of sealer after PUI was marginally better than Endoactivator at all levels.