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VOLUME 9 , ISSUE 1 ( June, 2017 ) > List of Articles


Evaluation of Dentinal Crack Initiation after Root Canal Preparation Using three Different Nickel Titanium Rotary Instrument: An In Vitro Study

RS Basavanna, Vasundhara Shivanna, Juhi Ku Nayak

Keywords : Dentinal cracks, ProTaper next, ProTaper universal, K3XF, Root canal instrumentation, Vertical root fracture, Rotary Nickel-Titanium instruments

Citation Information : Basavanna R, Shivanna V, Nayak JK. Evaluation of Dentinal Crack Initiation after Root Canal Preparation Using three Different Nickel Titanium Rotary Instrument: An In Vitro Study. CODS J Dent 2017; 9 (1):10-15.

DOI: 10.5005/jp-journals-10063-0026

License: CC BY-NC-ND 3.0

Published Online: 01-12-2018

Copyright Statement:  Copyright © 2017; The Author(s).


Objectives: To evaluate the incidence of dentinal crack initiation after root canal preparation using four different nickeltitanium (NiTi) rotary instruments. Methods: Sixty single-rooted premolars were selected. A total of 15 teeth were left unprepared and served as a negative control; another 25 teeth were instrumented with the ProTaper universal system up to size F2 as a positive control, and the remaining 30 teeth were shaped with the following experimental groups with an apical size 25 file: ProTaper Next X2 and K3XF 25/0.4. Canals were irrigated with 12 mL of 1% sodium hypochlorite solution and rinsed with 5 mL of distilled water. All the roots were sectioned perpendicular to the long axis at 3, 6 and 9 mm from the root apex and examined under a stereomicroscope at 25X magnification to determine the presence of cracks. Data were analyzed using Fischer's exact test. Results: There was a non-significant difference in the percentage of dentinal crack after biomechanical preparation with NiTi rotary files as compared to the unprepared group except when compared with protaper universal. Interpretation and conclusion: All NiTi rotary files are capable of initiation of cracks during root canal instrumentation. The maximum percentage of cracks occur in the apical section. The percentage of dentinal crack in the apical section is least in ProTaper Next.

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  1. Peters OA. Current challenges and concepts in the preparation of root canal systems: a review. J Endod. 2004 Aug; 30(8):559-567.
  2. Shori DD, Shenoi PR, Baig AR, Kubde R, Makade C, Pandey S. Stereomicroscopic evaluation of dentinal defects induced by new rotary system: “ProTaper NEXT” Jol of Conserv Dent 2015 May-Jun;18(3):210-213
  3. Garg S, Mahajan P, Thaman D, Monga P. Comparison of dentinal damage induced by different nickel-titanium rotary instruments during canal preparation: An invitro study. Jol of Conserv Dent 2015 Jul-Aug;18(4):302-305
  4. Kim HC, Lee MH, Yum J, Versluis A, Lee CJ, Kim BM. Potential Relationship between Design of Nickel-Titanium Rotary Instruments and Vertical Root Fracture JOE 2010 Jul;36(7):1195-1199
  5. Iacono F, Pirani C, Generali L, Bolelli G, Sassatelli P, Lusvarghi L, et al. Structural analysis of HyFlex EDM instruments. International Endodontic Journal 2017, Mar;50(3):303-313
  6. Tamse A. Vertical root fractures in endodontically treated teeth: diagnostic signs and clinical management. Endodontic Topics 2006 Mar;13(1):84-94.
  7. Capar ID, Arslan H, Akcay M, Uysal B. Effects of ProTaper Universal, ProTaper Next, and HyFlex Instruments on Crack Formation in Dentin. JOE 2014 Sept 40 (9):1482–1484
  8. Olivieri BJG, Font M G, Sanchez J A G, Cayon MR, Sindreu FD. Danger zone analysis using cone beam computed tomography after apical enlargement with K3 and K3XF in a manikin model. J Clin Exp Dent. 2016;8(4):e361-7.
  9. Shen Y, Zhou HM, Wang Z, Campbell L, Zheng YF, Haapasalo M. Phase Transformation Behavior and Mechanical Properties of Thermomechanically Treated K3XF Nickel-Titanium Instruments. J Endod 2013;39:919-923
  10. Dane A, Capar ID, Arslan H, Akçay M, Uysal B. Effect of Different Torque Settings on Crack Formation in Root Dentin. J Endod 2016;42:304-306.
  11. Okitsu M, Takahashi H, Yoshioka T, Iwasaki N, Hideaki. Effective Factors Including Periodontal Ligament on Vertical Root Fractures. Dental Materials Journal, 2005;24(1):66-69.
  12. Li SH, Lu Y, Song D, Zhou X, Zheng QH, Gao Y, Huang DM. Occurrence of Dentinal Microcracks in Severely Curved Root Canals with ProTaper Universal, Wave One, and ProTaper Next File Systems. JOE 2015 Nov;41(11):1875-1879.
  13. Venino PM, Citterio CL, Pellegatta A, Ciccarelli M, Maddalone M. A Micro–Computed Tomography Evaluation of the Shaping Ability of Two Nickel-Titanium Instruments, HyFlex EDM and ProTaper Next. JOE 2017 Apr 43;(4):628-632.
  14. Monga P, Bajaj N, Mahajan P, Garg S. Comparison of incidence of dentinal defects after root canal preparation with continuous rotation and reciprocating instrumentation. Singapore Dental Journal 2015;3(6):29-33
  15. Kesim B, Sagsen B, Aslan T. Evaluation of dentinal defects during root canal preparation using thermomechanically processed nickel-titanium files. Eur J Dent. 2017 Apr- Jun;11(2):157-161.
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