BMC oral health
Root canal morphometric indices of anterior teeth and their association with chronological age: a retrospective CBCT study in an Iranian population
By Zargar N, Shamsi A, Safi Y and 3 others.
Abstract
Background
This study examined the associations between root canal morphometric indices of anterior teeth and chronological age and evaluated their apparent model fit for age association analysis in an Iranian population using cone-beam computed tomography (CBCT).
Methods
In this retrospective cross-sectional study, 1,200 intact anterior teeth from 100 patients were analyzed using CBCT images. Although each patient contributed 12 anterior teeth, regression analyses were performed separately for each tooth type. Participants were evenly distributed across five predefined age strata (15-24, 25-34, 35-44, 45-54, and ≥ 55 years), while age was treated as a continuous variable in all analyses. Measurements included length ratio (LR), buccolingual and mesiodistal width ratios (WR), and canal shape ratio (CSR), obtained using OnDemand3D™ software. Multiple linear regression was used to assess age associations and construct exploratory age‑estimation models, while logistic regression was used for exploratory sex‑prediction analyses.
