International Journal of Clinical Pediatric Dentistry

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VOLUME 9 , ISSUE 4 ( October-December, 2016 ) > List of Articles

Original Article

Incidence of Apical Crack Initiation during Canal Preparation using Hand Stainless Steel (K-File) and Hand NiTi (Protaper) Files

Dileep Soni, Rachit Mathur, Nidha Madan, Suchita Visnoi

Keywords : Cracks, Instrumentation, Root canal preparation, Vertical root fracture, Working length

Citation Information : Soni D, Mathur R, Madan N, Visnoi S. Incidence of Apical Crack Initiation during Canal Preparation using Hand Stainless Steel (K-File) and Hand NiTi (Protaper) Files. Int J Clin Pediatr Dent 2016; 9 (4):303-307.

DOI: 10.5005/jp-journals-10005-1382

License: CC BY-NC 4.0

Published Online: 01-04-2019

Copyright Statement:  Copyright © 2016; The Author(s).


Aim: To evaluate the incidence of apical crack initiation during canal preparation with stainless steel K-files and hand protaper files (in vitro study). Materials and methods: Sixty extracted mandibular premo-lar teeth are randomly selected and embedded in an acrylic tube filled with autopolymerizing resin. A baseline image of the apical surface of each specimen was recorded under a digital microscope (80×). The cervical and middle thirds of all samples were flared with #2 and #1 Gates-Glidden (GG) drills, and a second image was recorded. The teeth were randomly divided into four groups of 15 teeth each according to the file type (hand K-file and hand-protaper) and working length (WL) (instrumented at WL and 1 mm less than WL). Final image after dye penetration and photomicrograph of the apical root surface were digitally recorded. Results: Maximum numbers of cracks were observed with hand protaper files compared with hand K-file at the WL and 1 mm short of WL. Chi-square testing revealed a highly significant effect of WL on crack formation at WL and 1 mm short of WL (p = 0.000). Conclusion: Minimum numbers of cracks at WL and 1 mm short of WL were observed with hand K-file and maximum with hand protaper files. How to cite this article: Soni D, Raisingani D, Mathur R, Madan N, Visnoi S. Incidence of Apical Crack Initiation during Canal Preparation using Hand Stainless Steel (K-File) and Hand NiTi (Protaper) Files. Int J Clin Pediatr Dent 2016;9(4):303-307.

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  1. Schilder H. Cleaning and shaping the root canal. Dent Clin North Am 1974 Apr;18(2):269-296.
  2. Pettiette MT, Metzger Z, Phillips C, Trope M. Endodontic complications of root canal therapy performed by dental students with stainless-steel K-files and nickel titanium hand files. J Endod 1999 Apr;25:230-234.
  3. Bier CA, Shemesh H, Tanomaru-Filho M, Wesselink PR, Wu MK. The ability of different nickel-titanium rotary instruments to induce dentinal damage during canal preparation. J Endod 2009 Feb;35:236-238.
  4. Young GR, Parashos P, Messer HH. The principles of techniques for cleaning root canals. Aust Dental J 2007 Mar;52:52-53.
  5. Peters OA. Current challenges and concepts in the preparation of root canal systems: a review. J Endod 2004 Aug;30(8): 559-567.
  6. Liu R, Hou BX, Wesselink PR, Wu MK, Shemesh H. The incidence of root microcracks caused by 3 different single-file systems versus the protaper system. J Endod 2013 Aug;39(8): 1054-1056.
  7. Saunders WP, Saunders EM, Gutmann JL. Ultrasonic root-end preparation, part II: microleakage of EBA root-end fillings. Int Endod J 1994 Nov;27(6):325-329.
  8. Tsesis I, Rosen E, Tamse A, Taschieri S, Kfir A. Diagnosis of vertical root fractures in endodontically treated teeth based on clinical and radiographic indices: a systematic review. J Endod 2010 Sep;36(9):1455-1458.
  9. Reeh ES, Douglas WH, Messer HH. Stiffness of endodontically treated teeth related to restoration technique. J Dent Research 1989 Nov;68(11):1540-1544.
  10. Trope M, Ray HL. Resistance to fracture of endodontically treated roots. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 1992 Jan;73(1):99-102.
  11. Hill RL, del Rio CE. A histological comparison of the canal wall planingability of two new endodontic files. J Endod 1983 Dec;9(12):517-522.
  12. Liu R, Kaiwar A, Shemesh H, Wesselink PR, Hou B, Wu MK. Incidence of apical root cracks and apical dentinal detachments after canal preparation with hand and rotary files at different instrumentation lengths. J Endod 2013 Jan;39(1): 129-132.
  13. Adorno CG, Yoshioka T, Suda H. The effect of working length and root canal preparation technique on crack development in the apical root canal wall. Int Endod J 2010 Apr;43(4): 321-327.
  14. Franco V, Fabiani C, Taschieri S, Malentacca A, Bortolin M, Del Fabbro M. Investigation on the shaping ability of nickeltitanium files when used with a reciprocating motion. J Endod 2011 Oct;37:1398-1401.
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