Title

Comparative effect of various rotary retreatment file systems and ultrasonic tips - An in vitro study

Authors

Arunima Jana*, Ajay Kumar Nagpal, Abhishek Sharma, Akanksha Kumari, Seemran Panda & Astha Bhargava

Affiliation

Department of Conservative Dentistry and Endodontics, K.D. Dental College and Hospital, Mathura, Uttar Pradesh, India; *Corresponding author

Email

Arunima Jana - E-mail: arunimajana1998@gmail.com

Ajay Kumar Nagpal - E-mail: drajayendodontist@gmail.com

Abhishek Sharma - E-mail: drabhisheksh90@gmail.com

Akanksha Kumari - E-mail: akkirexmusix@gmail.com

Seemran Panda - E-mail: seemranpanda4@gmail.com

Astha Bhargava - E-mail: asthabhargava03@gmail.com

Article Type

Research Article

Date

Received July 1, 2026; Revised July 31, 2026; Accepted July 31, 2026, Published July 31, 2026

Abstract

Endodontic failure due to persistent infection, missed canals, or inadequate obturation often necessitates retreatment, yet achieving complete removal of filling material remains a clinical challenge. Therefore, it is of interest to evaluate the 78 extracted single-rooted mandibular premolars obturated with gutta-percha and AH Plus sealer, retreated using Hedstroem files, NeoEndo, Micro-Mega Retreat, HyFlex Remover systems and ultrasonic tips. Residual filling material at coronal, middle and apical thirds and retreatment time were assessed through stereomicroscopic digital analysis and analyzed using ANOVA and Tukey tests. Ultrasonic tips achieved the highest removal of filling material, followed by HyFlex Remover, both outperforming manual and earlier Ni-Ti systems with greater consistency and reliability. Thus, data shows that ultrasonic activation, when combined with contemporary Ni-Ti retreatment systems, significantly enhances the cleanliness of root canal walls and offers a more predictable protocol for managing failed endodontic treatments.

Keywords

Endodontic retreatment; rotary retreatment file systems; ultrasonic retreatment tip; stereomicroscopic evaluation; retreatment efficiency

Citation

Jana et al. Bioinformation 22(7): 4397-4401 (2026)

Edited by

Ritik Kashwani

ISSN

0973-2063

Publisher

Biomedical Informatics

License

This is an Open Access article which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. This is distributed under the terms of the Creative Commons Attribution License.