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Forensic odontology is the application of dental science to legal investigations primarily involving the identification of the offender by comparing dental  - Information from aboutforensics.co.uk

It is a combination of these ridges and the sweat that causes a fingerprint to be left behind when the finger comes into contact with a surface Fingerprints - Information from aboutforensics.co.uk

Such an impression may be twodimensional the print left behind on a flat collected from the crime scene may be useless unless there are suspect - Information from aboutforensics.co.uk