Presentation on theme: "Teeth and Bite Mark Evidence"— Presentation transcript:
1 Teeth and Bite Mark Evidence Forensic OdontologyTeeth and Bite Mark Evidence
2 What is a Forensic Odontologist? Most forensic odontologists are practicing dentists.However, they have gone through specialized training to understand how to apply forensic science to dentistry.Most are members of aprofessional organization.
3 The Importance of Forensic Odontology A forensic investigation of teeth will help to determine:-Individual Identification-Mass Disaster Identification-Bite mark analysis-Dental Malpractice
4 An Understanding of Teeth Teeth begin to appear at 6 months of age and all should have emerged by age 3.Humans have 20 deciduous (baby) teeth.Between the ages of 7-21 years all of the deciduous teeth should have been replaced with permanent teeth.Adults have 32 permanent teeth. This includes the four wisdom teeth.Teeth are the hardest substance in the body.
10 Identification using Teeth Many times identity of a skeleton can be determined by comparing the teeth features in the skull to dental records. Unusual features including the number and types of teeth and fillings, the spacing of the teeth, and/or special dental work (bridges, false teeth, root canals) help to make a positive identification.
11 Example of a Dental Record Today, most people have a dental record.Dental records have information about the condition of each tooth and this information is compared to the postmortem report.
12 Dental Work That Makes Teeth Unique Dental CrownDental Fillings
13 Dental Work That Makes Teeth Unique (cont) Dental ExtractionDental Bridge
14 Postmortem Dental Information will include any unique dental features
15 Lifestyle Effect on Teeth will also help to identify the body First, the antemortem (before death) and postmortem (after death) X-rays are compared.Next, the investigator will look for other lifestyle indications from the teeth. For example, smoking.
18 Lifestyles and TeethMouth of a smokerMouth of a Meth user
19 DenturesThere are cases where the victim no longer had teeth and wore dentures.Records are also kept for dentures so this dental appliance is a very good source.
20 Cases of Identification using Teeth The first case – Roman Emperor Claudius to recognize his beheaded mistress.First U.S. Court case- in 1849 the incinerated remains of George Parkman were identified using a partial denture.First case using dental records- identified the victims of the Vienna Opera House fire in 1878.
21 Cases of Identification using Teeth In more recent times, teeth identification has been used in mass disasters such as plane crashes, fires and bombings.Approximately half of the victims from the September 11, 2001attack on theWorld Trade Centerwere identified usingDNA, jewelry anddental records.
22 Bite Mark EvidenceForensic odontologists will also work on cases that involve bite mark evidence.Bite marks are found when teeth are used as weapons.
23 Bite Mark EvidenceBite mark evidence is controversial because skin is elastic and distortable.The accuracy of this evidence is often questioned by the court.Many bite mark cases are overturned.However, this evidence is very helpful in excluding suspects.Many times the saliva on the bite mark allows DNA analysis.
24 Ted BundyThe Ted Bundy Case is a very famous bite mark case. Bundy had a very unusual bite and was convicted on this evidence.
25 Ted Bundy and his teeth configuration that caused the unusual bite