University of Khartoum

The Diameter of the Inferior Alveolar Canal : A Comparative CT and Macroscopic Study of Sudanese Cadaveric Mandibles

The Diameter of the Inferior Alveolar Canal : A Comparative CT and Macroscopic Study of Sudanese Cadaveric Mandibles

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Title: The Diameter of the Inferior Alveolar Canal : A Comparative CT and Macroscopic Study of Sudanese Cadaveric Mandibles
Author: Mashail Mahmoud ,Mahgoub
Abstract: Background :CT scan is a reliable diagnostic method of head and neck pathology.In patients with oral cancer it is of great value in detecting bone invasion, as well as perineural spread. The latter usually result in widening of the bony canals and foramina. Objectives :The aims of this study were : • o validate the use of CT scan for assessment of inferior alveolar canal dimensions. • o measure the dimensions of the inferior alveolar canal at different sites in normal cadaveric mandibles. • o compare the dimensions of the inferior alveolar canal, measured from the CT scan, to the one measured macroscopically in human cadavers. • o compare the dimensions of the inferior alveolar canal on the left and right sides of the jaw. Material and Methods:The study was conducted on fivecomplete human cadaveric mandibles.Each mandible was marked at six positions from the distal border of the mental foramina in the posterior direction at intervals of 10.0 mm on both right and left side. On each dry mandible, and at the six sites namely, X1, X2, ج X3, X4, X5, andX6, Gutta Percha points, known as markers, were attached on the buccal side. All dry specimens were CT scanned in coronal plane.The specimens were then sectioned longitudinally in matching locations of CT cuts using an electrical bone saw. Using a digital caliber, manual measurements on the cross-sectional images and the dry specimens were taken.On both sides of the mandibles at the six labeled sites, 2 variables; the inner width and the inner height of the inferior alveolar canal were measured. Data were presented as mean, standard deviation(SD),standard error of the mean (SEM), and correlation coefficient at decimal of 0.00. T-Test was done to compare between the means and simple linear regression, and to estimate the relation between the measured variables. Results :Pearson correlation coefficient showed moderate linear correlation for measured variables. Regarding the height of the canal, the findings showed that there was no significant difference among measured variables from CT and the manual measurements (P>0.05). However for the width, there was significant statistical difference among measured variables from CT and the manual measurements (P<0.05). There was a significant difference in the dimensions of the canal between the right and left sides (P<0.05) Conclusion :Measurements of the inferior alveolar canal obtained from the CT scan were different from measurements of the canal taken macroscopically.
URI: http://hdl.handle.net/123456789/7867
Date: 2015-03-31


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