Denosumab Use as a Predictor Variable for External Cervical Resorption: A Case-Control Study

Introduction: The objective of this case-control study was to investigate the association between denosumab use and the risk of developing external cervical resorption (ECR). Methods: Thirty-three patients >= 45 years old who were diagnosed with ECR were selected. Controls were matched to the cases based on sex and age (+/- 5 years) in a 1:1 ratio. Confounders were classified into systemic factors, including a history of systemic sclerosis, hepatitis B, denosumab use, and bisphosphonate use, or local factors, including a history of traumatic occlusion, periodontal procedures (scaling and root planing and periodontal surgeries), and tooth extraction (excluding third molar extraction). Additionally, the number of remaining teeth in each subject was recorded using panoramic radiographs. The baseline characteristics of the 2 groups, including age, sex, and the number of remaining teeth, were compared using the chi-square and Mann-Whitney U tests. Binary logistic regression was used to determine the possible association between denosumab use and the risk of developing ECR (alpha < 0.05). Results: No significant differences in baseline characteristics were observed between the case and control groups (P > .05). After adjusting for systemic and local cofounders, denosumab use was significantly associated with the occurrence of ECR (odds ratio = 7.317; 95% confidence interval, 1.410-37.966; P < .05). Conclusions: Based on the binary logistic regression model, denosumab use could significantly predict the risk of developing ECR.