JIOH on LinkedIn JIOH on Facebook
  • Users Online: 308
  • Home
  • Print this page
  • Email this page
Home About us Editorial board Ahead of print Current issue Search Archives Submit article Instructions Subscribe Contacts Login 
Year : 2020  |  Volume : 12  |  Issue : 7  |  Page : 30-40

Effect of different kinematic cutting motion in multiple versus single-file concept on dentinal crack formation: An in vitro study

1 Department of Endodontics, Faculty of Dentistry, Assiut University, Assiut, Egypt
2 Department of Endodontics, Faculty of Dentistry, Ain Shams University, Cairo, Egypt
3 Department of Endodontics, Faculty of Dentistry, Beni Suef University, Beni Suef, Egypt
4 Department of Endodontics, Faculty of Dentistry, The British University in Egypt, Cairo, Egypt

Correspondence Address:
Weaam H Anous
Assistant Lecturer of endodontics, Faculty of dentistry, Assiut univeristy, Assiut.
Login to access the Email id

Source of Support: None, Conflict of Interest: None

DOI: 10.4103/jioh.jioh_141_19

Rights and Permissions

Aims and Objectives: The aim of this study was to assess crack formation using two different cutting motions (rotation and reciprocation) in nickel–titanium rotary instrument. Materials and Methods: One hundred extracted human mandibular incisors were selected for this study. Before root canal instrumentation, low-speed saw (under water cooling) was used to section the tooth horizontally at 3, 6, and 9 mm from the apex of 0.1 mm. A digital stereomicroscope at ×25 magnification with a cold light source was used to observe the slices. Then all teeth were placed again inside the mold. Samples were classified according to the system used into the following groups: Group 1: negative control, Group 2: the ProTaper Next files, Group 3: a primary reciprocating WaveOne Gold file, Group 4: a small reciprocating WaveOne Gold followed by primary reciprocating WaveOne Gold file, and Group 5: OneShape rotary file. Samples were scanned by using a digital stereomicroscope to detect crack formation. Results: Apical level: WaveOne Gold (primary) group showed the highest prevalence of cracks. Middle level: OneShape group showed the highest prevalence of cracks followed by WaveOne Gold (small and primary) group. Coronal level: The five groups showed no statistically substantial difference in the presence of cracks. Conclusion: All rotary systems can lead to the crack formation.

Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)

 Article Access Statistics
    PDF Downloaded44    
    Comments [Add]    

Recommend this journal