Inter J Stomatol ›› 2009, Vol. 36 ›› Issue (6): 657-660.doi: 10.3969/j.issn.1673-5749.2009.06.008

• Original Articles • Previous Articles     Next Articles

Evaluation of apical transportation after shaping different curved root canals by

ZHONG Sulan1, YIN Shi-hai1, CHEN Zhao-hui2, JIE You-qiong1, WANG Li3   

  1. 1. Dept. of Conservative Dentistry and Endodontics, West China College of Stomato
  • Received:2009-01-08 Revised:2009-08-30 Online:2009-11-20 Published:2009-11-20
  • Contact: YIN Shi-hai

Abstract: Objective To evaluate the apical transportation after shaping different curved root canals by Micro-CT. Methods The 30 roots of 10 maxillary malors were used. The canals were divided into three groups by curvature including 10 canals each group. Canals were prepared using stainless steel K-type files by the step-back technique. Then all the samples were scanned by Micro-CT before, in and after instrumentation. The extent of apical transportation were calculated. Results Statistical differences in apical transportation were found between test groups when prepared to the size 25. When canals were prepared to the size 35, the severe group showed more apical transportation than the other two groups. There was no statistical difference between the light and secondary groups. The apical transportation were statistical differences in every test groups no matter in size 35 or 25. Conclusion The canals showed more apical transportation when the curvature and the size of files were larger.

Key words: apical transportation, Micro-CT, curved root canal, stainless steel K-type file


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