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VOLUME 12 , ISSUE 3 ( May-June, 2021 ) > List of Articles


A Novel Root Canal Preparation Technique Hybridizing Heat-treated Nickel-Titanium Rotary Instruments

Marco Seracchiani

Keywords : Endodontics, Hybrid heat treatment, Ni-Ti rotary instruments, Root canal treatment

Citation Information :

DOI: 10.5005/jp-journals-10015-1830

License: CC BY-NC 4.0

Published Online: 00-06-2021

Copyright Statement:  Copyright © 2021; The Author(s).


Aim: This study aimed to assess the potential of the hybrid heat treatment (HHT) technique for shaping severely curved canals. Background: This innovative HHT technique combines the use of both Ni-Ti austenitic and martensitic Ni-Ti files, with a simplified sequence, to properly utilize the different files’ properties. Case description: The operative technique started with canal scouting and determination of working length using a size 10 SS K-file. Then, a specific sequence was applied using the F1 20.06v Ni-Ti austenitic file (EdgeTaper) for the preparation of the coronal and middle parts of the canal. This step was followed by S2 20.04 and F1 20.06v martensitic Ni-Ti files (EdgeTaper Platinum) to enlarge the canal until the apex reached. No intracanal breakage of any instruments or deformation of flutes was recorded. Conclusion: The present study describes a new HHT technique aiming at simplifying procedures and taking most of the different characteristics of the different heat treatment; the clinical cases seem to show its potentialities in terms of safety, speediness, effectiveness, and preservation of original anatomy. Clinical significance: The cases show the advantages of the newly proposed technique over a traditional approach to properly shape complex anatomies with only a few Ni-Ti rotary instruments number.

  1. Peters OA, Plaque F. Current developments in rotary root canal instrument technology and clinical use: a review. Quintessence Int 2010;41:479–488.
  2. Schilder H. Cleaning and shaping the root canal. Dent Clin North Am 1974;18(2):269–296.
  3. Schilder H. Filling root canals in three dimensions. Dent Clin North Am 1967. 723–744.
  4. Goerig AC, Michelich RJ, Schultz HH. Instrumentation of root canals in molar using the step-down technique. Endod J 1982;8(12):550–554. DOI: 10.1016/S0099-2399(82)80015-0.
  5. Morgan LF, Montgomery S. An evaluation of the crown-down pressureless technique. Endod J 1982;10(10):491–498. DOI: 10.1016/S0099-2399(84)80207-1.
  6. Ruddle CJ. Access preparation endodontic: an opening for success. Dent Today 2007;26(2):114. , 116-9.
  7. Plotino G, Grande NM, Isufi A, et al. Fracture strength of endodontically treated teeth with different access cavity designs. J Endod 2017;43(6):995–1000. DOI: 10.1016/j.joen.2017.01.022.
  8. Yared G. Canal preparation using only one Ni-Ti rotary instrument: preliminary observations. Int Endod J 2008;41(4):339–344. DOI: 10.1111/j.1365-2591.2007.01351.x.
  9. Yared G. Canal preparation with nickel-titanium or stainless steel instruments without the risk of instrument fracture: preliminary observations. Restor Dent Endod 2015;40(1):85–90. DOI: 10.5395/rde.2015.40.1.85.
  10. Gambarini G, Di Nardo D, Miccoli G, et al. The influence of a new clinical motion for endodontic instruments on the incidence of postoperative pain. Clin Ter 2017;168(1):e23–e27.
  11. Malagnino VA, Rossi-Fedele G, Passariello P, et al. Simultaneous technique and a hybrid Microseal/PacMac obturation. Dent Update 2011;38(7):477–478. DOI: 10.12968/denu.2011.38.7.477481-482,484.
  12. Gambarini G, Piasecki L, Miccoli G, et al. Classification and cyclic fatigue evaluation of new kinematics for endodontic instruments. Aust Endod J 2019;45(2):154–162. DOI: 10.1111/aej.12294.
  13. Gambarini G, Seracchiani M, Piasecki L, et al. Measurement of torque generated during intracanal instrumentation in vivo. Int Endod J 2019;52(5):737–745. DOI: 10.1111/iej.13042.
  14. Jafarzadeh H, Abbott PV. Ledge formation: review of a great challenge in endodontics. J Endod 2007;33(10):1155–1162. DOI: 10.1016/j.joen.2007.07.015.
  15. Cheung GS, Liu CS. A retrospective study of endodontic treatment outcome between nickel-titanium rotary and stainless steel hand filing techniques. J Endod 2009;35(7):938–943. DOI: 10.1016/j.joen.2009.04.016.
  16. Di Nardo D, Galli M, Morese A, et al. A comparative study of mechanical resistance of two reciprocating files. J Clin Exp Dent 2019;11(3):e231–e235. DOI: 10.4317/jced.55487.
  17. Miccoli G, Gaimari G, Seracchiani M, et al. In vitro resistance to fracture of two nickel-titanium rotary instruments made with different thermal treatments. Ann Stomatol (Roma) 2017;8(2):53–58. DOI: 10.11138/ads/2017.8.2.053.
  18. Gambarini G, Galli M, Di Nardo D, et al. Differences in cyclic fatigue lifespan between two different heat treated NiTi endodontic rotary instruments: WaveOne Gold vs EdgeOne Fire. J Clin Exp Dent 2019;11(7):e609–e613. DOI: 10.4317/jced.55839.
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