Forensic Medicine Lecture 4 (Identification) PDF
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Mansoura University
Dr. Ziad Mahana
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This document is a forensic medicine lecture about identification. It includes definitions and different cases, and includes sections, questions, and diagrams.
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LECTURE (4) Identification Recognition of a person through certain features that differentiate him from all other persons (individuality). Individuals accused of assault, murder or Marriage rape. Inheritance Interchange of newborn babi...
LECTURE (4) Identification Recognition of a person through certain features that differentiate him from all other persons (individuality). Individuals accused of assault, murder or Marriage rape. Inheritance Interchange of newborn babies in Passport/license hospitals. Missing persons Impersonation Insurance claim ① In cases of fire, explosion and accidents. ② When unknown dead body is found on the road, fields, railway compartment or water. ③ In cases of decomposed body. ④ In cases of mutilated body. Collection of bones: Report on a bone ① Age. ⑥ Origin of bone ② Sex. ⑦ Person or more ③ Race. ⑧ Time passed since death ④ Stature. ⑨ Cause of death ⑤ Deformities. 20 in number (10 upper and 10 lower) The eruption starts at about 6 months after birth & Completed the end of the 2nd year. There are no milk premolars. 32 in number {16 in upper jaw & 16 in lower jaw} 6 ()سن المدرسة 7 8 9 10 11 12 18-25 1. Order of eruption of permanent teeth is in the following sequence Mama Is In Pain; Papa Can Make Medicine 2. Mother is in bed; baby comes Monday morning. Same as above, except that B→ Bicuspid Which one is the oldest permanent tooth in adult ? Oldest permanent tooth in oral cavity (in adults) - First molars. Which one is the youngest permanent tooth in adult? Youngest permanent tooth in oral cavity (in adults) - Third molars. – Mixed dentition: Between 6-10 y, the child has both temporary and permanent teeth. In mixed dentition, the total number of teeth is always 24. ① Personal identification: Irregularities, Crowdness, Deformities, Dental fillings etc. ② Age estimation. ③ Sex determination: Identifying Y-chromosome in dental pulp ④ Occupation and habits: Tailors: show notched upper incisors from wear and tear. Smokers: Dark brown stains on the back of incisors. ⑤ Identification of the type and date of a crime: From the site and date of the abrasions and contusions of the bite Ossification begins centrally in an epiphysis spreads peripherally as it gets bigger. Determination of age based on union of epiphyses with a range of ± 6 months. In females, union of epiphysis is TWO years earlier than males. The pelvis tells the story. Highly arched Less arched Narrow, deep, small Broad, shallow, large Narrow, triangular Broad, rectangular U-shaped, rounded, broader V-shaped, sharp angle, 70°-75° angle, 90°-100° Heart-shaped or Circular triangular Smaller Larger The bones forming the angle/arch are more concave in females but straight in males ① Parietal eminences. ② Superciliary ridges. ③ Frontonasal junction. ④ Mastoid processes. ⑤ Occipital condyles. ⑥ Occiput ⑦ Foramen magnum Negroid skull Frontal suture. More prominent superciliary ridges Flat nasal bridge with wide nasal apertures. Flat hard palate. Prognathism. Small mastoid processes. Strong, ivory, white large teeth. pointed pterion. Impression made by the ball of the finger. The principle that skin of the balls of fingers and thumb is covered with papillary ridges with pores of sweat glands. They develop during intrauterine life (at 16th week) and remain constant throughout life. They cannot be altered except in: ① Transitory absence due to exposure to ionizing radiation and steel industry. ② Permanently destroyed in some chronic skin diseases as leprosy and scleroderma. ① It is used for all ages. ② Persistent: even after peeling of the epidermis due to putrefaction. ③ Absolute identification. ④ Needs no special training or expensive instruments ① In children, first erupted permanent tooth is: A. Central incisor B. First molar C. Canine D. Lateral incisor E. First premolar ② The anterior fontanelle closure occurs at: A. 6-9 months B. 9-12 months C. 18 months D. 3 years ③ In old age, the mental foramen: A. opens near the lower margin B. opens near the alveolar margin C. opens Midway between upper and lower margins D. it is closed