There are four for the field of forensic dentistry: the Bureau of Legal Dentistry (BOLD), the American Society of Forensic Odontology (ASFO), the American Board of Forensic Odontology ( ABFO) and the International Organization of Forensic Odontostomatology (IOFOS). The American Board of Forensic Odontology (ABFO) has created methodological guidelines in an effort to reduce discrepancies and increase the validity of bite mark analysis. They also provide information on how to best collect and preserve evidence, so that potentially useful evidence is not discarded just because the forensic odontologist's collection methods were not