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Guided Endodontics: Three-Dimensional Planning and Template-Aided Preparation of Endodontic Access Cavities

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[Micro-CT evaluation of root canal deviation after preparation].

Ying Chen¹, Bo Gao, Jin-bo Yang

¹Dept. of Cariology and Endodontology, The Fourth Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China.

Hua Xi Kou Qiang Yi Xue Za Zhi = Huaxi Kouqiang Yixue Zazhi = West China Journal of Stomatology

|November 26, 2009

Summary

This study introduces a new micro-computed tomography (micro-CT) system to evaluate curved root canal deviation. The developed method confirms ProTaper instruments effectively shape canals with minimal deviation for clinical use.

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Area of Science:

Endodontics
Dental Materials Science
Medical Imaging

Background:

Evaluating root canal preparation efficacy, particularly in curved canals, is crucial for successful endodontic treatment.
Traditional methods for assessing canal deviation may lack precision, especially in three dimensions.

Purpose of the Study:

To establish a novel evaluation system for curved root canal deviation using micro-computed tomography (micro-CT).
To assess the shaping ability of ProTaper Nickel-Titanium (NiTi) hand files in curved simulated root canals.

Main Methods:

Simulated curved root canals were prepared using the crown-down technique with ProTaper NiTi hand files.
Micro-CT scanning and image processing software were employed to analyze cross-sectional areas and center transportation.

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Published on: May 24, 2022

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A three-dimensional (3D) model of the root canal was constructed to evaluate preparation effects.

Main Results:

Consistent cross-sectional areas were observed after preparation with ProTaper files.
A new evaluation system combining planar and 3D indices for root canal deviation was established using micro-CT data.
The ProTaper system demonstrated minimal deviation in canal shape, indicating suitability for clinical application.

Conclusions:

A 3D root canal central axis model was successfully established using micro-CT.
This provides a new method for analyzing the shaping ability of endodontic instruments.
The combined 2D and 3D analysis offers a more direct assessment of root canal deviation.