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Understanding External Cervical Resorption in Vital Teeth.

Athina M Mavridou¹, Esther Hauben², Martine Wevers³

¹Department of Oral Health Sciences, BIOMAT Research Cluster, KU Leuven and University Hospitals Leuven, Leuven, Belgium; Private Practice, Endo Rotterdam, Rotterdam, The Netherlands.

Journal of Endodontics

|October 26, 2016

Summary

External cervical resorption (ECR) is a dynamic process in vital teeth, characterized by a three-stage mechanism involving initiation, resorption, and repair. This study elucidates ECR

Keywords:

Cone-beam computed tomography external cervical resorption hypoxia nanofocus computed tomography reparative mineralized tissue

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Published on: April 8, 2020

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Published on: July 21, 2014

Area of Science:

Dental Research
Oral Pathology
Tooth Histology

Background:

External cervical resorption (ECR) is a complex pathological process affecting vital teeth.
Understanding the 3D structure and cellular characteristics of ECR is crucial for diagnosis and management.
Previous studies have combined histomorphological and radiographic findings to investigate ECR.

Purpose of the Study:

To investigate the 3D structure and cellular/tissue characteristics of external cervical resorption (ECR) in vital teeth.
To elucidate the phenomenon of ECR by integrating histomorphological and radiographic data.
To propose a mechanism for the initiation and progression of ECR.

Main Methods:

Analysis of 27 vital permanent teeth diagnosed with ECR using clinical and cone-beam computed tomographic (CBCT) imaging.
Further investigation of extracted teeth via nanofocus computed tomographic imaging, hard tissue histology, and scanning electron microscopy (SEM).
Histomorphological and radiographic correlation to understand ECR development.

Main Results:

A three-stage mechanism for ECR was proposed: initiation at the cementum, 3D resorption towards the pulp, and repair by bonelike tissue.
A resorption-resistant sheet composed of predentin, dentin, and reparative tissue protects the pulp space.
Simultaneous repair and remodeling occur during the advanced stages, with resorption and repair progressing in parallel.

Conclusions:

ECR is a dynamic and complex condition involving both periodontal and endodontic tissues.
Integrated analysis using clinical, histological, radiographic, and SEM methods enhances understanding of ECR evolution.
A novel three-stage mechanism for ECR initiation and progression has been established.