Submitted: 07 May 2007
Accepted: 25 Feb 2013
ePublished: 25 Feb 2013
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J Iran Dent Assoc. 2005;17(3): 88-94.
  Abstract View: 22

Research

A comparison of transportation and time of canal preparation with stainless steel hand instruments and Ni-Ti rotary systems (In – Vitro)

Mohammad reza Sharifian*, Mohammad hossein Nekoofar, Poria Motahari, Azadeh Tavakoli
*Corresponding Author: Email: mrsharifian@yahoo.com

Abstract

A comparison of transportation and time of canal preparation with stainless steel hand instruments and Ni-Ti rotary systems

 (In – Vitro)

 Dr. MR. Sharifian* - Dr. MH. Nekoofar* - Dr. P. Motahari** - Dr. A. Tavakoli***

 *-Assistant Professor of Endodontics Dept. – Faculty of Dentistry – Tehran University of Medical Sciences.

**- Assistant Professor of Oral and Maxillofacial Pathology Dept. – Faculty of Medicine – Tehran University of Medical Sciences.

***- Dentist.

Background and Aim: Canal preparation, as a basis for a successful endodontic treatment, is a big challenge in curved canals. The aim of this study was to evaluate canal transplantation and time of its preparation with stainless steel hand instrument (k – Type) and Ni-Ti rotary systems: Profile and Hero 642.

Materials and Methods: In this interventional study, forty – two extracted curved (20-50) human mandibular molars were divided into three groups. Canal preparations were performed with stainless steel hand instruments and Ni-Ti rotary systems: profile and Hero 642. Pre and post instrumentation radiographic images were superimposed. Mercury was injected pre and post instrumentation for canal shape recognition. A computer – based software (Corel Draw 7) was used for the analysis of canal transportation. Time of canal preparation was also recorded. Data was subjected to ANOVA statistical test.

Results: Stainless steel hand instrument (k – Type) shaped significantly greater canal transportation both mesiodistally and buccolingually than profile and Hero642 (P<0.05). Time of canal preparation with Ni-Ti rotary systems was significantly less than that of hand file (P<0.05).

Conclusion: Canal transportation and time of canal preparation in Ni-Ti rotary systems were significantly less than stainless steel hand file

Key words: Canal transportation – Hand file – Stainless steel – Rotary file – (Ni-Ti) – Time of canal preparation.

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