Navigation Links
The teeth of cadavers reveal their identity
Date:6/29/2010

Researchers from the University of Granada have shown that a person's dental patterns can be used as proof of their identity with the same degree of reliability as DNA testing, the method that forensic police use to reveal the identity of dead bodies. The researchers came to their conclusion after analyzing the dental patterns of more than 3,000 people.

"There is sufficient dental diversity between people to enable a scientifically-based human identification method to be developed for forensic purposes", Stella Martn de las Heras, lead author of the study and a professor of Legal and Forensic Medicine at the University of Granada (UGR), tells SINC.

In order to reach this conclusion, the researcher and her team carried out a statistical analysis of 3,166 full and partial sets of teeth taken from the databases in the three most recent National Surveys of Oral Health (1993, 2000 and 2005).

Using these data, the team estimated "conditioned dental diversity", eliminating cases where people had all their teeth "present and healthy" or people who were "edentulous" (without a single tooth in their mouth), as these were of no use for identification purposes.

The results of the study, published in the journal Forensic Science International, show variability values of 0.999 (on a scale of 0 to 1), "which is comparable to the rates for a scientifically-based identification method such as mitochondrial DNA", stresses Martn de las Heras.

However, the scientist does acknowledge the limitations of using dental patterns: "Dental characteristics have low stability within the population compared with mitochondrial DNA sequences, which are only affected by mutations and heteroplasmy (different types within the same mitochondria, cell or individual)".

The dental patterns of a population depend on oral health status and, therefore, on age (decay is a cumulative disease) and the therapeutic dental approach of the time. At present, we are in a restorative phase (where teeth are restored) as opposed to extractive (when teeth are removed), as they were previously.

"But by analysing the data bases of dental patterns in Spanish populations according to different age groups and birth cohorts, we found test results with high homogeneity for all the databases, which shows the value of this system for identifying people, and its forensic utility", says the researcher.

Comparing teeth before and after death

In this procedure, an oral autopsy makes it possible to obtain a cadaver's dental data. To do this, forensic scientists use a range of techniques depending upon the body's state of preservation. In some cases they have to remove the maxillary bones in order to find details that cannot be identified in any other way.

The post mortem dental pattern is compared with the dental data of the person in life, information that is provided by dentists, although it can also come from doctors and family members. Various IT programmes are used to help in comparison and identification.

Aside from this finding, the team has developed a piece of software to identify bite marks. This tool makes it possible to superimpose, precisely and in 3D, the mark left by a bite over the tooth arrangement of a possible suspect.


'/>"/>

Contact: SINC
info@plataformasinc.es
34-914-251-820
FECYT - Spanish Foundation for Science and Technology
Source:Eurekalert  

Related medicine news :

1. "Save-A-Tooth" System Now Used to Transport Teeth Destined For Cryopreservation and Stem Cell Treatment of Disease
2. Amino Acid May Be Key to Strong Teeth
3. Dreaming of a Whiter Christmas and New Year for Your Teeth?
4. Mark5inc Teeth Whitening Resource Is Presented To Web
5. Health Bites: 8 Things You Didnt Know About Your Teeth
6. Celebrate National Childrens Dental Health Month by Taking Care of Tiny Teeth
7. Phoenix-Lazerus, Inc., Maker of Save-A-Tooth Says Lack of Preparation for Knocked out Teeth can Make Children Dentally Handicapped for Life
8. Grinding Teeth at Night May Be a Sign of Daytime Stress
9. After Teeth Are Pulled, Platelet-Rich Plasma May Speed Healing
10. Cavities in Baby Teeth May Come From Poor Food Choices
11. Shoulder Repair Technique Borrows From Cadavers
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
The teeth of cadavers reveal their identity
(Date:2/5/2016)... ... February 05, 2016 , ... Love is in the air at King ... colors, assortments and packaging. This staple for Valentine’s Day is a must-have, and can ... For Valentine’s Day, not only are long-stem roses available, but also other flower bouquets, ...
(Date:2/5/2016)... ... February 05, 2016 , ... ... stage for new clinical and scientific initiatives have all marked the last 12 ... appointed President and CEO of the nation’s oldest cancer center, Candace S. Johnson, ...
(Date:2/5/2016)... ... February 05, 2016 , ... Francisco ... micro-needling services in their Napa Valley office. The technique utilizes the body’s own ... Dr. Canales and Dr. Furnas, are part of only a select few cosmetic ...
(Date:2/5/2016)... ... ... After years as an active staff surgeon and having served as the director ... transitioned to chief of the Division of Plastic Surgery at what is now known ... began a second three-year term in January of 2016. , The original selection was ...
(Date:2/5/2016)... ... February 05, 2016 , ... In the fourth quarter ... gathered at the La Valencia Hotel in San Diego, California to discuss changes ... the year’s most outstanding franchise, walking away with the coveted David Wright Award ...
Breaking Medicine News(10 mins):
(Date:2/5/2016)... India , February 5, 2016 ... a new market research report "Fetal (Labor & Delivery) ... & Antepartum), Warmer, Incubator, Pulse Oximeter, Phototherapy/Jaundice Management Devices, ... published by MarketsandMarkets, This report studies the global market ... market is estimated at USD 6.28 Billion in 2015 ...
(Date:2/4/2016)... 2016 For hospitals considering enrollment in the ... in the program, the Health Resources and Services Administration,s ... , Mega-Guidance , could have significant impact on plans ... September 2016. Essential Insights , Daniel ... summarizes the Mega-Guidance,s key proposed changes, including a new ...
(Date:2/4/2016)... , Feb. 4, 2016  SciClone Pharmaceuticals, ... announced it has entered into a settlement agreement ... (SEC) fully resolving the SEC,s investigation into possible ... Under the terms of the settlement agreement, SciClone ... million, including disgorgement, pre-judgment interest and a penalty.  ...
Breaking Medicine Technology: