These bitemark comparison mini-studies have been around for decades. They generally use a few subjects (in this ‘study” there are 20 biters) who bite into wax, clay, bubble gum etc. The superimposition method used was developed in the 1970’s (a Zerox machine) and 1692 (Salem witch trial bitemark matching). There are two examiners who ‘tested’ the samples for this recently published article.
The authors strongly promote their results for any forensic odontologist based on the premise that, like fingerprint biometrics, all human teeth are unique to each person in the world. They make piddling recognition to limitations affecting any of their assumptions, claims or methods such as: Disagreement in Bitemark Analysis Casework.
Read the full study. (.pdf) Arab Journal of Forensic Sciences and Forensic Medicine