Age estimation by pulp-to-tooth area ratio using cone-beam computed tomography: A preliminary analysis.

BACKGROUND: Age estimation of living or deceased individuals is an important aspect of forensic sciences. Conventionally, pulp-to-tooth area ratio (PTR) measured from periapical radiographs have been utilized as a nondestructive method of age estimation. Cone-beam computed tomography (CBCT) is a new method to acquire three-dimensional images of the teeth in living individuals.

AIMS: The present study investigated age estimation based on PTR of the maxillary canines measured in three planes obtained from CBCT image data.

SETTINGS AND DESIGN: Sixty subjects aged 20-85 years were included in the study.

MATERIALS AND METHODS: For each tooth, mid-sagittal, mid-coronal, and three axial sections-cementoenamel junction (CEJ), one-fourth root level from CEJ, and mid-root-were assessed. PTR was calculated using AutoCAD software after outlining the pulp and tooth.

STATISTICAL ANALYSIS USED: All statistical analyses were performed using an SPSS 17.0 software program.

RESULTS AND CONCLUSIONS: Linear regression analysis showed that only PTR in axial plane at CEJ had significant age correlation (r = 0.32; P < 0.05). This is probably because of clearer demarcation of pulp and tooth outline at this level.