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Related Experiment Video

Updated: Jun 25, 2026

Dynamic Navigation in Endodontics: Guided Access Cavity Preparation by Means of a Miniaturized Navigation System
07:03

Dynamic Navigation in Endodontics: Guided Access Cavity Preparation by Means of a Miniaturized Navigation System

Published on: May 5, 2022

Root Canal Location Accuracy: Dynamic Navigation Verses Freehand in Extracted Human Molars - A Randomized In Vitro

Fei Chen1, Tianxiao Han2, Haili Guo1

  • 1Department of Stomatology, The First Medical Center, Chinese PLA General Hospital, Beijing, China.

International Dental Journal
|June 23, 2026
PubMed
Summary
This summary is machine-generated.

Dynamic navigation systems (DNSs) significantly improve root canal location accuracy in molars compared to freehand methods. These systems reduce angular deviation by over 94% and tooth structure loss by over 26%, enhancing procedural success.

Keywords:
Access cavity preparationDynamic navigation systemGuided endodonticsMinimally invasive endodonticsRoot canal location

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Last Updated: Jun 25, 2026

Dynamic Navigation in Endodontics: Guided Access Cavity Preparation by Means of a Miniaturized Navigation System
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Published on: May 5, 2022

Dynamic Navigation for Dental Implant Placement
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Guided Endodontics: Three-Dimensional Planning and Template-Aided Preparation of Endodontic Access Cavities
07:14

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

Published on: May 24, 2022

Area of Science:

  • Endodontics
  • Dental technology
  • Minimally invasive dentistry

Background:

  • Accurate root canal location is critical in endodontic treatment.
  • Complex root canal anatomy in molars presents challenges for conventional techniques.
  • Dynamic navigation systems (DNSs) offer potential for improved precision.

Purpose of the Study:

  • To compare the accuracy, instrumentation time, and success rate of three DNS types (infrared-active, infrared-passive, visible light-passive) against freehand (FH) operation.
  • To evaluate DNS performance in locating root canals of maxillary and mandibular molars.
  • To provide data for selecting appropriate techniques in complex endodontic cases.

Main Methods:

  • Ninety-six extracted human molars were divided into four groups: IA-DNS, IP-DNS, VP-DNS, and FH (control).
  • Cone-beam computed tomography (CBCT) was used for specimen scanning.
  • Real-time bur position tracking was employed in DNS groups; the FH group used a microscope with CBCT reference.
  • Key parameters measured included angular and 3D deviations, instrumentation time, tooth structure loss, and canal location success rate.

Main Results:

  • DNS groups showed significantly higher accuracy, with 94.3%–94.7% lower angular deviation compared to FH (P < .001).
  • Three-dimensional deviations at entry and target points were significantly smaller in DNS groups (P < .001).
  • Tooth structure loss was reduced by 26.8%–34.6% with DNS (P < .001), and success rates were higher (99.54% vs. 93.06%, P = .004). No significant differences were found among DNS types.

Conclusions:

  • Dynamic navigation systems significantly enhance the accuracy of root canal location in molars.
  • DNS minimizes tooth structure loss and increases the success rate of endodontic procedures.
  • The consistent performance across different DNS types supports their use for precise endodontic management, especially in calcified canals.