Objective- Aim of this study was to evaluate and compare the efficacy supplementary techniques (ultrasonic tip/Neoendo Retreatment files) in removing remaining filling materials (gutta-percha/Resin based sealer/BCSealer) from oval-shaped root canals during non-surgical endodontic retreatment. Materials and methods- 20 mandibular single rooted premolars were taken, disinfected by immersing in 3% hypochlorite solution and then stored in 0.9% saline until use.Samples were decoronated approximately at the level of CEJ maintaining a standardized root length of 15mm. Apical patency was established by size 10 k file. Working length was determined 1mm short of the measurement. Each tooth was performed with access opening followed by instrumentation (BMP) till 30- 4%. Irrigation with 2ml of 3% NaOCl solution was performed after each instrument. Finally instrumented canals were rinsed with 1ml of 17% EDTA followed by 3% NaOCl for using side vented 30G irrigating needle placed 1 mm short of working length. Canals were irrigated with normal saline, dried with paper points and then master GP cones were selected for each canal .Tooth were randomly divided into two groups (n=10) depending on the sealer used for root canal obturation. GP cone was coated with respective sealer and then obturated using both the sealer till the WL .Both the sealer groups were further divided into two subgroups. The first subgroup of each group had H files along with ultrasonics and the other had Neo Endo Retreatment Files. Samples were grooved, sectioned longitudinally and examined under stereomicroscope for cleaner portions of the root(coronal,middle and apical thirds).Statistical analysis were performed using Mann Whitney U TEST. Results- Lower values of remnant filling material were found for BC Sealer(4.1) compared to resin based sealer(5.9) (P <0.05) , and considering the supplementary technique, lower values of remnant filling material were found for the ultrasonic tip compared to Neoendo retreatment file. The remaining filling material was observed in all samples regardless the filling material or the supplementary technique employed. Conclusion- None of the supplementary techniques were able to remove the remaining filling material completely fro the root canal.Ultrasonic tips should be considered better for retreatment especially in bioceramic sealer cases.