Abstract
The current retrospective case-control study examined the potential systemic and local risk factors in relationship to external cervical resorption (ECR). The study hypothesis stated that both local and systemic risks associated with higher ECR rates. The ECR group included data about 76 patients (98 teeth) diagnosed with ECR at the university graduate endodontics clinic, from 2008 to 2018. An equivalent comparative control group without ECR was composed of the same pool of patients and matched with cases by gender and age. Information about dental and medical history, including potential local risk factors (bruxism, trauma, eruption disorders, extraction of an adjacent tooth, orthodontics, restorations), and systemic risk factors (medical conditions, medication, allergies), was collected for both groups. Data were analyzed at tooth and patient levels. Chi-square test or Fisher's Exact test compared proportions between the two 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 < 0.05). Tr...Continue Reading
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