Reproducibility of Dental Bite Mark Overlay Analysis Using Digital 3D Models in Adult Participants

This study aims to evaluate the reproducibility and repeatability of a standardized digital overlay protocol used in forensic odontology for bite mark analysis. Bite mark analysis methods have been increasingly questioned due to concerns about their scientific reliability. This study focuses on the methodological evaluation of an overlay generation protocol independently of biological trace interpretation. Thirty adult participants requiring routine dental care involving intraoral scanning will be included. A digital impression of the maxillary dentition will be obtained using a standard intraoral scanner, which is a non-invasive and routine clinical procedure. Digital dental models will be anonymized and processed using dedicated software to generate overlays. Four operators with different levels of expertise will independently perform the overlay procedure at two separate time points. The study will assess intra-operator repeatability and inter-operator reproducibility using quantitative 2D and 3D metrics. The objective is to determine the variability of the protocol and to contribute to the standardization and reliability of overlay-based analyses in forensic dentistry.

NCT Number	NCT07552051
Lead Sponsor	Nantes University Hospital
Conditions	Forensic Dentistry, Bite Mark Analysis
Enrollment	30 participants
Start Date	2026-04-01
Primary Completion	2027-06 (estimated)
Study Completion	2027-06 (estimated)
Updated on ClinicalTrials.gov	2026-06-24