الفهرس 
List of tablesOnly 14 pages are availabe for public view
 |  | from | 124 |  |  |
| | | from | 124 | | |
Abstract
Identification is a subtle perception and often one of the most significant priorities in the investigation of criminal cases, mass disasters, and in forensic concerns. Gender determination is one of the important parameters in forensic identification. Several structures like sellaturcica, mastoid air cells, paranasal sinuses and particularly the frontal air sinuses have been utilized for this purpose due to its irregular shape and unique nature with respect to every individual just like finger prints. In cases of mass disasters, even the skull and other bones are badly blemished, however it has been reported that maxillary air sinuses remain intact. The present study was designed to determine sex and compare between the use of frontal air sinus and maxillary air sinus dimensions on cephalometric radiographs for sex determination. The length and width of each sinus were measured by using Dicom viewer software. A total of 100 subjects belonging to both genders (50 males and 50 females) of age group (25–50) years attending to the department of Radiology in Sohag University Hospital selected for the study by simple random sampling according to inclusion criteria.
Summary
85
Through the present study we found that:
There is no significant difference between males and females as
regard age (P value 0.199). The mean value of age for males was (34.48±
5.24) and the man value of age for females was (35.48±5.39).
There was statistically significant higher values in the means of the
right frontal air sinus length and width in males ( 2.21 ± 0.42 & 1.78 ±
0.39) than the means of length and width of the left frontal air sinus (1.89
± 0.37 & 1.55 ± 0.45).
Also the same as regard females, there was a statistically
significant higher values in the means of right frontal air sinus length and
width (1.24 ± 0.32 & 1.04 ± 0.27) than the means of length and width of
the left frontal air sinus (1.47 ± 0.32 & 1.19 ± 0.32).
In the present study, the right maxillary air sinus reported to be
larger than the left maxillary air sinus in both genders. The right
maxillary air sinus showed an average size ( length x width) of (3.56 x
2.41) in males and (2.65 x 2.06) in females.
The left maxillary air sinus showed an average size of (2.28x3.46)
in males and (2.84 x 1.44) in females.
At the present study there was a significant higher values in the
means of right and left frontal air sinus measures in males than the mean
of right and left frontal air sinus measures in females.
In males the mean values of the right frontal air sinus length and
width were (2.21 ± 0.42 & 1.78 ± 0.39) and the mean values of the left
frontal air sinus length and width were (1.89 ± 0.37 &1.55 ± 0.45), but in
females the mean values of right frontal air sinus length and width were
Summary
86
(1.47 ± 0.32 & 1.19 ± 0.31) and the mean values of the left frontal air
sinus length and width were (1.24 ± 0.32 &1.04 ± 0.27).
In the present study, comparison between male and female groups
showed that the male group had statistically significant higher values for
both the right and left maxillary air sinuses as regards the length and the
width.
In males the mean value of the right maxillary air sinus length and
width were (3.56 ± 0.43 & 2.41 ± 0.38) and the mean value of the left
maxillary air sinus length and width were (3.46 ± 0.38 & 2.28 ± 0.41) ,
but in females the mean value of the right maxillary air sinus length and
width were (2.65 ± 0.22 & 2.06 ± 0.38) and the mean value of the left
maxillary air sinus length and width were (2.44 ± 0.22 & 1.84 ± 0.39).
For each measurement, determination of the cut-off value between
sensitivity and specificity revealed that right frontal air sinus width was
the most specific (specificity 86 %) and right frontal air sinus length was
the most sensitive (sensitivity 94) measure to discriminate between both
genders.
In the present study, the results of ROC analysis indicated that the
highest sensitivity rate was obtained for left maxillary air sinus length
(sensitivity 100%) and the highest specificity rate was obtained in right
maxillary air sinus length(specificity 100%).
The present work revealed that among all frontal air sinus
measurements the right frontal air sinus length was the best discriminate
variable between genders with overall accuracy of 80% in females and
92% in males.
The present study showed that the maxillary air sinus length was
the best predictor of gender in males and females with accuracy (100% in
females and 98% in males).