Kelly Fonseca Barbosa Aquino¹, Ana Grasiela Limoeiro²*, Rina Andrea Pelegrine¹, Wania Christine Figueiredo Dantas¹, Pamela Freitas Aguiar¹, Carlos Eduardo da Silveira Bueno¹ and Carlos Eduardo Fontana⁴

¹Faculdade São Leopoldo Mandic, Instituto de Pesquisa São Leopoldo Mandic, Campinas, Brasil
²Faculdade de Odontologia de Bauru, Departamento de Dentística, Endodontia e Materiais Dentários, Universidade de São Paulo, Bauru, Brasil
³Pontifical Catholic University of Campinas, Programa de Pós-graduação em Ciências da Saúde, São Paulo, Brazil

*Corresponding Author: Ana Grasiela Limoeiro, Faculdade de Odontologia de Bauru, Departamento de Dentística, Endodontia e Materiais Dentários, Universidade de São Paulo, Bauru, Brasil.

Received: July 11, 2025; Published: August 07, 2025

Abstract

Introduction: This study compared the shaping ability of mesial canals in lower molars using the Hyflex CM and XP-endo Shaper rotary instrumentation systems, utilizing high-resolution computed tomography.

Materials and Methods: Thirty-four mesial canals were instrumented and divided into two groups (n = 17): Hyflex CM (HCM) and XP-endo Shaper (XP). A high-resolution computed tomography scan was performed before and after the root canal preparation. The data were analyzed by two trained evaluators. The parameters analyzed included the canal centralization in the cervical, middle, and apical segments, as well as in the entire canal, and the increase in the area at segments 0-3 mm, 0-6 mm, and 0-9 mm from the apex, using the EVOL software. For intragroup and intergroup assessment of the surface area at the three levels, the T-test or Wilcoxon test was used. The ANOVA test was employed for intragroup evaluation of preparation centralization among the three levels.

Results: In the flattening region across all segments, both systems showed statistically significant differences intragroup (p < 0.05). Regarding surface area, a statistically significant difference was observed only in the apical segment, where the XP-endo Shaper system resulted in a greater area of wear compared to the preparation provided by the Hyflex system (p = 0.0025).

Conclusion: It was concluded that both systems, despite having different instrumentation methodologies and thermal treatments, showed similar outcomes in the instrumentation of curved mesial canals.

 Keywords: Endodontic Treatment; High-resolution Computed Tomography; Preparation Centralization; Shaping Ability

References

1. Uslu G., et al. “Apically Extruded Debris during Root Canal Instrumentation with Reciproc Blue, HyFlex EDM, and XP-endo Shaper Nickel-titanium Files”. Journal of Endodontics5 (2018): 856-859.
2. Peters OA. “Current challenges and concepts in the preparation of root canal systems: a review”. Journal of Endodontics8 (2004): 559-567.
3. Da Silva Limoeiro AGAG., et al. “Micro-computed tomographic evaluation of 2 nickel-titanium instrument systems in shaping root canals”. Journal of Endodontics3 (2016): 496-499.
4. Damkoengsunthon C., et al. “Evaluation of the shaping ability of different rotary file systems in severely and abruptly curved root canals using cone beam computed tomography”. Saudi Dental Journal10 (2024): 1333-1338.
5. Marceliano-Alves MFV V., et al. “Shaping ability of single-file reciprocating and heat-treated multifile rotary systems: a micro-CT study”. International Endodontic Journal12 (2015): 1129-1136.
6. Azim AA., et al. “A Novel Adaptive Core Rotary Instrument: Micro-computed Tomographic Analysis of Its Shaping Abilities”. Journal of Endodontics9 (2017): 1532-1538.
7. Estrela C., et al. “Characterization of successful root canal treatment”. Brazilian Dental Journal1 (2014): 3-11.
8. Vertucci FJ DD. “Root canal anatomy of the human permanent teeth”. Oral Surgery, Oral Medicine, Oral Pathology 5 (1984): 589-599.
9. Schneider SW. “A comparison of canal preparations in straight and curved root canals”. Oral Surgery, Oral Medicine, Oral Pathology 2 (1971): 271-275.
10. Falakaloğlu S., et al. “Shaping ability of different NiTi rotary systems during the preparation of printed mandibular molars”. Australian Endodontic Journal2 (2023): 256-261.
11. Morgental RD., et al. “Cutting efficiency of conventional and martensitic nickel-titanium instruments for coronal flaring”. Journal of Endodontics12 (2013): 1634-1638.
12. Thomas AR., et al. “Analysis of Shaping Abilities of Rotary File Systems in Oval Canals with Moderate Root Curvature: A Randomized Controlled Ex Vivo Study”. The Journal of Contemporary Dental Practice 4 (2023): 221-227.
13. Morales M de LNP., et al. “Microcomputed tomographic evaluation of 6 NiTi files on the pericervical dentin and the smallest dentin thickness zones in mesial root canals of mandibular molars: an in vitro study”. Clinical Oral Investigation3 (2024): 166.
14. Vinodhini V., et al. “Compare the Centering Ability, Canal Transportation and Root Canal Area Increase of XP Endoshaper, Hyflex CM and K3 XF File System by using Cone Beam: An Original Research”. Journal of Pharmacy and Bioallied Sciences 16 (2024): S380-382.
15. Wu MK., et al. “The capability of two hand instrumentation techniques to remove the inner layer of dentine in oval canals”. International Endodontic Journal3 (2003): 218-224.
16. Dantas WCF., et al. “Microtomographic Assessment of the Shaping Ability of the Hyflex CM and XP-endo Shaper Systems in Curved Root Canals”. European Journal of Dentistry3 (2023): 699-705.
17. Dantas WCF, ., et al. “Microtomographic Assessment of the Shaping Ability of the Hyflex CM and XP-endo Shaper Systems in Curved Root Canals”. European Journal of Dentistry3 (2023): 699-705.
18. Marceliano-Alves MF., et al. “Unprepared areas and centralization of oval canals prepared with WaveOne Gold or XP-endo Shaper: microcomputed tomographic analyses”. Acta Odontológica Latinoamericana3 (2023): 177-182.
19. Wang Y., et al. “Finding appropriate nickel-titanium instruments for lingual canals in mandibular first premolars with two canals: A micro-CT study”. Australian Endodontic Journal 49 (2023): 89-98.
20. Khandeparkar ANS., et al. “A cone-beam computed tomographic analysis of total dentin removed, canal transportation, and canal-centering ability following instrumentation with three different file systems: An in vitro study”. Journal of Conservative Dentistry and Endodontics5 (2023): 574-578.
21. Fontes LP., et al. “Shaping Ability of XP-Endo Shaper Files With Extended Use Time and R40 Blue in Oval Canals: A Microcomputed Tomography Study in Contralateral Premolars”. Journal of Endodontics (2025).

Citation

Citation: Ana Grasiela Limoeiro., et al. “Impact of Instrumentation of Curved Mesial Canals in Mandibular Molars with the XP-Endo Shaper and Hyflex”.Acta Scientific Medical Sciences 9.9 (2025): 16-23.

Copyright

Copyright: © 2025 Ana Grasiela Limoeiro., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.