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Related Experiment Video

Updated: Nov 7, 2025

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

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

Published on: May 24, 2022

Microguided endodontics: Accuracy evaluation for access through intraroot fibre-post.

Cyril Perez^1,2,3, Amira Sayeh², Olivier Etienne^1,2,3

¹UMRS-1121 INSERM Biomaterials and Bioengineering, Université de Strasbourg, Strasbourg, France.

Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc

|April 29, 2021

Summary

Guided endodontic techniques accurately remove bonded fibre posts, even with dental composite artefacts in cone-beam computed tomography (CBCT) images. This microguided endodontics approach proves predictable and efficient for fibre-post removal.

Keywords:

endodontics fiberglass reinforced polymers guidance template

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Area of Science:

Dentistry
Endodontics
Dental Materials

Background:

Removing bonded fibre posts can be challenging due to artefacts in cone-beam computed tomography (CBCT) images caused by composite dental materials.
Accurate post removal is crucial for successful endodontic retreatment and preserving tooth structure.

Purpose of the Study:

To evaluate the reliability of a guided endodontic technique for removing bonded fibre posts.
To assess the accuracy of the technique in the presence of CBCT image artefacts.

Main Methods:

Ten simulated models with natural posterior teeth were prepared with forty fibre-post and composite-core restorations.
Pre-operative CBCT and optical surface scans were merged for digital design and 3D-printed guides.
Two operators used the guides to perform endodontic access, with deviations measured post-operatively.

Main Results:

The mean deviation between planned and actual drill paths was 0.39 ± 0.14 mm coronally and 0.40 ± 0.19 mm apically.
The guided technique demonstrated high precision in accessing the fibre posts.

Conclusions:

Microguided endodontics is a predictable and accurate method for efficient fibre-post restoration removal.
The technique is reliable even when CBCT images contain artefacts from composite dental materials.