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Abstract : The elimination of obturation materials in endodontic retreatment is one of the mandatory steps to achieve an optimal disinfection process. The utilization of bc-coated gutta-percha with bioceramic sealer can enhance adhesion, thus increasing the difficulty during endodontic retreatment procedures. The use of non-linear motion files such as XP-Endo Finisher can improve the cleanliness level of the root canal walls. This study aims to determine the effectiveness of XP-Endo Finisher in eliminating obturation materials consisting of bioceramic coated gutta-percha and conventional gutta-percha with bioceramic sealer in endodontic retreatment. Twenty-four single-rooted mandibular premolar teeth that met the inclusion criteria were endodontically treated up to the obturation stage, followed by an endodontic retreatment procedure. The teeth were divided into four groups: Group A (bc-coated gutta-percha group prepared with ProTaper Retreatment), Group B (conventional gutta-percha group prepared with ProTaper Retreatment), Group C (bc-coated gutta-percha group prepared with ProTaper Retreatment and XP-Endo Finisher), and Group D (conventional gutta-percha group prepared with ProTaper Retreatment and XP-Endo Finisher). All teeth were longitudinally split into buccal and lingual, and the dentinal walls were examined using a scanning electron microscope (SEM) at the apical third of the root canal. The obtained data were subjected to One-way ANOVA statistical analysis, followed by a post hoc LSD test. The results of the One-way ANOVA test showed a significant difference in the cleanliness level of the root canal walls among all the groups. The Post Hoc LSD test revealed a significant difference among all the groups except for Group A compared to Group C. The elimination of bc-coated gutta-percha is more challenging compared to conventional gutta-percha. The supplementary use of XP-Endo Finisher enhances the cleanliness of the root canal walls during endodontic retreatment procedures.