- Visibility 89 Views
- Downloads 79 Downloads
- Permissions
- DOI 10.18231/j.ijce.79909.1759914146
-
CrossMark
- Citation
Forging flexibility: The science and innovation behind modern NiTi rotary endodontic files
Nickel-titanium (NiTi) rotary instruments have revolutionized root canal therapy by offering unparalleled flexibility, superelasticity, and efficiency in canal shaping. This article reviews the metallurgical principles and proprietary innovations that have transformed conventional NiTi into a smart and adaptive material, including microstructural phase control, heat treatment protocols, surface modification techniques, and commercially available thermally modified file systems. These advancements enhance clinical performance by improving cyclic fatigue resistance, shaping efficiency, and patient safety.
References
- Peters OA. Current challenges and concepts in the preparation of root canal systems: a review. J Endod. 2004;30(8):559–67.
- De Ataide ID, Wagle R, Fernandes M. The Quality of Canal Preparation Using Stainless Steel Hand Files and Nickel-Titanium Rotary Instruments. Endodontology. 2006;18(2):25–34. HTTPS://DOI.ORG/10.4103/0970-7212.351847
[Google Scholar] - Lakshmanan L, Jeevanandan G. Microbial Evaluation of Root Canals after Biomechanical Preparation with Manual K-files, Manual H-files, and Kedo-SG Blue Rotary Files: An in Vivo Study. Int J Clin Pediatr Den . 2022;15(6):687–
- https://doi.org/10.5005/jp-journals-10005-2457
[Google Scholar] - Biradar B, Moon MY, Sudharani Biradar DN, Palekar A, Deshpande Y. Fundamental design features of NiTi instruments;-A Review. Ann Roman Soc Cell Biol. 2020:1310-5.
- Palekar A, Vajpayee A, Biradar B. Recent advances in metallurgy and design of rotary endodontic instruments: a review. Int J Dent Mater. 2020;2(2):52–9. https://doi.org/10.37983/IJDM.2020.2204
[Google Scholar] - Asha K, Sheetal G, Madhu P, Sameer S. NiTi rotary system in endodontics – An overview. IP Indian J Conserv Endod. 2023;8(3):128–33. DOI:10.18231/j.ijce.2023.025
[Google Scholar] - Srivastava S, Alghadouni MA, Alotheem HS. Current strategies in metallurgical advances of rotary NiTi instruments: A review. J Dent Health Oral Diso rd Ther. 2018 ;9(1):72–7. HTTPS://DOI.ORG/10.15406/jdhodt.2018.09.00333
[Google Scholar] - Harshavardhan JM, Chakravarthy D, Vijayaraja S, Manoj KT, Bakkiyalakshmi A, Sitharthan K. Metallurgy of Rotary Files-A Review: Metallurgy. J Curr Med Res Opin. 2021;4(06):975–80. https://doi.org/10.15520/jcmro.v4i06.434
[Google Scholar] - Arias A, Peters OA. Present status and future directions: Canal shaping. Int Endod J. 2022;55(3):637–55.
- Palekar A, Vajpayee A, Biradar1 B. Recent advances in metallurgy and design of rotary endodontic instruments: a review. Int J Dent Mater. 2020;2(2): 52–9. https://doi.org/10.37983/IJDM.2020.2204
[Google Scholar] - Chan WS, Gulati K, Peters OA. Advancing Nitinol: From heat treatment to surface functionalization for nickel–titanium (NiTi) instruments in endodontics. Bioact Mater. 2023;22:91–111. https://doi.org/10.1016/j.bioactmat.2022.09.008
[Google Scholar] - Zanza A, D’Angelo M, Reda R, Gambarini G. An update on nickel- titanium rotary instruments in endodontics: mechanical characteristics, testing and future perspective—An overview. Bioengineering (Basel) . 2021;8(12):218. https://doi.org/10.3390/bioengineering8120218
[Google Scholar] - Oh S, Moon SY, Chaniotis A, Pedullá E, Al-Ghamdi AS, Al-Ghamdi FA, et al. Evaluation of cyclic fatigue and bending resistance of coronal preflaring NiTi file manufactured with different heat treatments. Appl Sci . 2021;11(16):7694. https://doi.org/10.3390/app11167694
[Google Scholar] - Metzger Z, Teperovich E, Zary R, Cohen R, Hof R. The self- adjusting file (SAF). Part 1: respecting the root canal anatomy--a new concept of endodontic files and its implementation. J Endod. 2010;36(4):679–90. doi:10.1016/j.joen.2009.12.036
[Google Scholar] - Kasuga Y, Kimura S, Maki K, Unno H, Omori S, Hirano K, et al. Phase transformation and mechanical properties of heat-treated nickel-titanium rotary endodontic instruments at room and body temperatures. BMC Oral Health . 2023;23(1):825. https://doi.org/10.1186/s12903-023-03550-6
[Google Scholar] Baruah et al. / IP Indian Journal of Conservative and Endodontics 2025;10(3):138-145 145 - Alsofi L, Al-Marshadi M, AbuHaimed T, Al-Habib M, Saif R, Bukhari S, et al. Thermal behavior and cyclic fatigue resistance of three contemporary nickel-titanium heat-treated single-file systems: metallurgical study. BMC Oral Health. 2025;25(1):338. https://doi.org/10.1186/s12903-025-05708-w
[Google Scholar] - Kang YJ, Kwak SW, Ha JH, Gambarini G, Kim HC. Fracture resistances of heat-treated nickel-titanium files used for minimally invasive instrumentation. BMC Oral Health. 2025;25(1):126. https://doi.org/10.1186/s12903-025-05487-4
[Google Scholar] - Tabassum S, Zafar K, Umer F. Nickel-Titanium rotary file systems: what's new? Eur Endod J. 2019;4(3):111–117.
- Asha K, Ghivari S, Pujar M, Sait S. NiTi rotary system in endodontics – an overview. Int J Conserv Endod. 2023;8(3):128–33. Https://doi.org/10.18231/j.ijce.2023.025
[Google Scholar]
How to Cite This Article
Vancouver
Baruah D, Bansal P, Sharma N, Sarma N, Palakal ND, Gupta I, Malani P. Forging flexibility: The science and innovation behind modern NiTi rotary endodontic files [Internet]. IP Indian J Conserv Endod. 2025 [cited 2025 Oct 14];10(3):138-145. Available from: https://doi.org/10.18231/j.ijce.79909.1759914146
APA
Baruah, D., Bansal, P., Sharma, N., Sarma, N., Palakal, N. D., Gupta, I., Malani, P. (2025). Forging flexibility: The science and innovation behind modern NiTi rotary endodontic files. IP Indian J Conserv Endod, 10(3), 138-145. https://doi.org/10.18231/j.ijce.79909.1759914146
MLA
Baruah, Darshana, Bansal, Parul, Sharma, Nikita, Sarma, Nabanita, Palakal, Nitin D, Gupta, Iti, Malani, Prishita. "Forging flexibility: The science and innovation behind modern NiTi rotary endodontic files." IP Indian J Conserv Endod, vol. 10, no. 3, 2025, pp. 138-145. https://doi.org/10.18231/j.ijce.79909.1759914146
Chicago
Baruah, D., Bansal, P., Sharma, N., Sarma, N., Palakal, N. D., Gupta, I., Malani, P.. "Forging flexibility: The science and innovation behind modern NiTi rotary endodontic files." IP Indian J Conserv Endod 10, no. 3 (2025): 138-145. https://doi.org/10.18231/j.ijce.79909.1759914146