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Forensic Medicine

Forensic Medicine. Odontology and Serology. Odontology. Characteristics of teeth after death: No other body part lasts longer In fires, teeth usually only means to ID remains No two people have identical teeth *What other mean of identification is unique to an individual?*. continued.

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Forensic Medicine

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  1. Forensic Medicine Odontology and Serology

  2. Odontology • Characteristics of teeth after death: • No other body part lasts longer • In fires, teeth usually only means to ID remains • No two people have identical teeth *What other mean of identification is unique to an individual?*

  3. continued • Requirements for identification: • Need dental records • Dentists chart 5 surfaces of each tooth in a grid (odontogram) • Can also provide bite mark evidence

  4. …continued • Teeth can be useful in determining a subject’s age: • Deciduous teeth start to erupt at about 6 months and continue until around 2 years of age • 20 teeth total • Last until age 12 • Permanent teeth start pushing out deciduous teeth at age 6 • The last permanent teeth to emerge are the third molars/wisdom teeth • 32 teeth total • See Odontology handout

  5. Serology • Blood type • Four types • A, B, O (O- universal donor), and AB (AB+ universal recipient) • Rh factor • + or - • Female cells have Barr bodies • Looks like a “drumstick” projecting from one of the nuclear lobes • Solid, round, well defined projection of nuclear chromatin connected to the nucleus by a strand of chromatin • Present in 80 to 90% of somatic cells of normal females • Not found in normal males • Found in males with Klinefelter’s syndrome and not found in females with Turner’s syndrome

  6. Blood Types and Compatability

  7. Criminology • Kastle-Meyer test to determine if it is indeed blood: Luminol • Precipitin test – determines animal or human blood • Can determine type and gender from blood (DNA) • Provides reliable and informative evidence • Blood splatter

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