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http://dx.doi.org/10.5395/JKACD.2009.34.3.232

EFFECTS OF ANTICURVATURE FILING ON DANGER ZONE WIDTH IN CURVED ROOT CANALS  

Kim, Eui-Seong (Department of Conservative Dentistry, College of Dentistry, Yonsei University)
Kim, Hyun-Jung (Department of Conservative Dentistry, College of Dentistry, Yonsei University)
Seo, Deog-Gyu (Department of Conservative Dentistry, College of Dentistry, Yonsei University)
Roh, Byoung-Duck (Department of Conservative Dentistry, College of Dentistry, Yonsei University)
Publication Information
Restorative Dentistry and Endodontics / v.34, no.3, 2009 , pp. 232-239 More about this Journal
Abstract
The aim of this study was to compare the effects of anti curvature filing with stainless steel k-file versus nickel-titanium ProFile in the shaping of mesial root canals of extracted mandibular molars. A total of 60 canals from 30 mesial roots of mandibular molar teeth were randomly assigned to three groups with n=20 each. They were prepared with different instruments and methods: The first group with stainless steel k-file and circumferential filing. the second with precurved stainless steel k-file and anticurvature filing and the third with ProFile C06 taper) and anticurvature filing. Using a micro-computed tomography system (skyscan-1076, SKYSCAN, Antwerpen, Belgium), pre-and post-operative specimens were scanned. Subsequently, canal images were superimposed and changes in root dentin thickness were measured at distal side (danger zone) of the canal. The data was analyzed using a one-way ANOVA and the comparison of means was conducted using a post hoc multiple comparison Tukey test. There were significant differences in the change of root dentin thickness at the $7.5{\sim}8.5\;mm$ level between group 1 and 2, $3.5{\sim}6mm$ level between group 1 and 3 and $3.5{\sim}6mm$ level between group 2 and 3(n=20, P<0.05).
Keywords
anticurvature filing; stainless steel k-file; nickel-titanium ProFile;
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