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:: Volume 23, Number 4 (Winter 2006) ::
J Dent Sch GYEAR__, 23(4): 526-532 Back to browse issues page
Comparison of debris and smear layer remaining in root canal wall after preparation with rotary and hand instruments in curved canals
Corresponding Author: Dr. Mohammad Asna- ashari *, Dr. Amir Hossein Abedi, Dr. Mohammad Ali Mozayeni
Associate Prof. , MO_ASNA12@yahoo.com
Abstract:   (6223 Views)

Background & Aim: The purpose of this scanning electron microscope (SEM) study was to compare the cleanliness of the root canal walls following either a manual or a rotary technique of canal instrumentation. The hypothesis was that a rotary technique would produce a cleaner root canal.

Methods & Materials: Manual filing was performed on 24 extracted teeth with the curvature more than 20º using stainless steel K-flexofile (DENTSPLY MAILLEFER). Powered instrumentation was carried out on a further 24 extracted teeth, using Hero 642 (Micro Mega France) nickel-titanium files in a handpiece NSK (ENDO-MAT TC) (375 r.p.m) according to the manufacturer’s instructions. A normal saline solution was used for irrigation. The roots were cut longitudinally and the canal walls were examined for debris and smear layer at the apical, middle and coronal level. Results: When using rotary technique, significant superiority was seen in removal of debris (p<0.05). But, the two groups didn’t have significant difference with reference to smear layer. The three region examined in each group didn’t have significant differences with regard to debris and smear layer.

Conclusion: The rotary technique employed in this study produced cleaner root canal walls than the manual SS K-flexofile instrumentation.

J Dent Sch 2006 23(4): 3

Keywords: Canal preparation, Cleanliness, Nickel-titanium, Hero 642, Rotary technique, SEM.
Full-Text [PDF 320 kb]   (879 Downloads)    
Type of Study: Original Article | Subject: Special
Received: 2006/09/6
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Asna- ashari M, Abedi A H, Mozayeni M A. Comparison of debris and smear layer remaining in root canal wall after preparation with rotary and hand instruments in curved canals. J Dent Sch. 2006; 23 (4) :526-532
URL: http://jds.sbmu.ac.ir/article-1-26-en.html
Volume 23, Number 4 (Winter 2006) Back to browse issues page
مجله دانشکده دندانپزشکی دانشگاه علوم پزشکی شهید بهشتی Shahid Beheshti University Dental Journal
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