الفهرس 
Forensic Dentistry
Structure and composition of dental cementumOnly 14 pages are availabe for public view
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Abstract
Nowadays, age estimation has become increasingly important in
forensic science not only for identification of corpses but also for living
individuals. Recently, cone beam computed tomography and teeth cemental
annulations were considered reliable tools for dental age estimation through
teeth evaluations which display a number of observable age related variables.
In this study the accuracy of cone beam computed tomography and teeth
cemental annulations were compared.
One hundred and twenty intact, non-carious and single rooted extracted
teeth were collected from outpatient clinics of oral surgery, Faculty of
Dentistry, Tanta University. Only incisors, canines and single-rooted
premolars were included in this work. Teeth were evenly distributed
according to gender and different age groups. Each group contained 30
extracted teeth (10 incisors, 10 canines and 10 premolars).The ages of the
patients ranged from 30 to 69 years old. The date and reason for extraction
were recorded.
All the examined teeth were arranged in acrylic blocks and the
mounted teeth were imaged by a cone beam computed tomography scanner
with a constant slice. The DICOM files were, then, imported in cone beam
computed tomography diagnostic and treatment planning simplant software
designed for the pulp and tooth volume calculations. Then ratio between
volume of pulp and volume of tooth excluding enamel was calculated using a
specially designed visual basic program to calculate the dental age based on
Yang et al., 2006 formula: Age = 54.32 _ (554.21 × Ratio of pulp/tooth
excluding enamel)