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[Evaluation of the efficiency of different instrumentation for root canal retreatment using micro-computed tomography]. | LitMetric

[Evaluation of the efficiency of different instrumentation for root canal retreatment using micro-computed tomography].

Hua Xi Kou Qiang Yi Xue Za Zhi

Dept. of Endodontics, School of Stomatology, Shandong University, Jinan 250012, China.

Published: June 2012

AI Article Synopsis

  • The study aimed to create a 3D model of human premolars using Micro-CT data and to compare the effectiveness of two methods for retreating root canals.
  • Forty extracted premolars were prepared and filled, then divided into two groups to be retreated with either K-Flexo files or the ProTaper Universal retreatment system.
  • Results indicated that K-Flexo files removed more filling material than the ProTaper system, especially in the apical third of the canal, although neither method completely eliminated all filling materials.

Article Abstract

Objective: To establish the three-dimensional model of human permanent premolars based on Micro-computed tomography (Micro-CT) data, and evaluate the efficiency quantitatively of two different instrumentations for root canal retreatment.

Methods: Forty extracted permanent premolars for the reason of orthodontic treatment were collected, prepared by using ProTaper Ni-Ti files and filled by cold gutta pertscha lateral condensation technique. The subjects were scanned by Micro-CT. Forty teeth were randomly divided into two groups and retreated by K-Flexo files and ProTaper Universal retreatment system respectively. Then all subjects were scanned again, and the mean percentage of remaining filling materials and the scores of remaining filling materials presented in upper, middle and apical 1/3 of the canal were calculated.

Results: Mean percentage of the remaining filling materials by K-Flexo files was lower than that by ProTaper Universal retreatment system (P=0.005). The scores demonstrated that K-Flexo files had greater efficiency than ProTaper Universal retreatment system when retreating the apical 1/3 of canal (P<0.05).

Conclusion: This study shows that both techniques could not remove filling materials completely.

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