HOME - Clinical cases - Endodontics
14 January 2022

External cervical resorption: what are the main risk factors?

Simona Chirico

External cervical resorption (ECR) is a phenomenon often found in the clinical practice of the endodontist, but the nature of this problem is still mostly unknown. It is characterized by the loss of dental hard tissue that could be internal (within the inflamed root canal system) or external (on the external surface of a root).
The ECR defect extends horizontally toward the root canal space and vertically (apically, coronally, or both). During this dynamic process, the pulp typically remains intact, except for the latest stage of  progression when the resorption may perforate the root canal space. The etiology of ECR is not fully understood. It has been proposed that for ECR initiation the combination of an injury on the periodontal ligament and the cementum layer along with factors activating the resorbing cells are required. 

To date, there are few studies in the literature that deal with this topic. In the latest issue of Journal of Endodontics was published the study of Irinakis et al., in which they tried to analyze which local and systemic factors could determine the onset of ECR. 

Materials and methods
The current retrospective study included 76 patients who were diagnosed with ECR from 2008–2018 at the University of British Columbia (UBC) graduate endodontics clinic (Vancouver, BC, Canada). 

An equivalent comparative control group without ECR was composed of the same pool of patients and matched with cases by sex and age. Information about dental and medical history, including potential local risk factors (bruxism, trauma, eruption disorders, extraction of an adjacent tooth, orthodontics, and restorations) and systemic risk factors (medical conditions, medication, and allergies), was collected for both groups. Data were analyzed at tooth and patient levels. The chi-square test or Fisher exact test compared proportions between the 2 study groups. 

The overall ECR prevalence among endodontic patients during the 10-year follow- up was 2.3%.
ECR was most frequent in maxillary anterior teeth (31.6%), and the Heithersay class 2 was the most frequent (38.8%) ECR diagnosis.
Diabetes was the only significant systemic risk factor (P < .05). 
Trauma, as a local risk factor, was significantly (P< .05) more frequently reported in cases than in controls. 

The study shows that ECR is associated with both local and systemic risk factors. Among these, diabetes and dental trauma are the most representative.

(Photocredit: Dr. Roberto Fornara)

For additional information: External Cervical Resorption: A Retrospective Case-Control Study

Read more

Resin composite materials, with their excellent mechanical properties and aesthetic properties, are now considered the materials of choice in dental restorations. In addition to direct fillings,...

Obstructive sleep apnea (OSA) is a common condition and the most prevalent form of sleep apnea. It is a growing threat to individuals and presents such dangerous health risks. Both sleep physicians...

The global market for dental implant abutment systems was forecast to grow at a CAGR of 7.54% across a forecast period of 2022 to 2026, according to a market analysis by ReportLinker. The uptick in...

USA     23 June 2022 - 30 November 0001

Make plans to attend the 2022 Florida Dental Convention!

The 2022 Florida Dental Convention (FDC) being held June 23-25 at the Gaylord Palms Resort & Convention Center in Orlando, FL is just days away!

Get ready for cutting-edge continuing education, new products and services, innovative technologies and so much more all under one roof. FDC2022 is excited to offer 130+ courses, 300+ leading dental...


Most popular




Copyright © 2022 - All Rights Reserved
ISSN 2767-1178