“…Similar to our findings, some authors have not identified any significant difference between male and female subjects 3,10,13 However, others have reported a statistically significant difference in the length of the canal between males and females where males having longer canals. 4,5,7,9,11,12,14,[16][17][18] The average AP diameter of NPC in this study was 3.69 mm with a range of 2-6 mm which was similar to the figures reported by many others in the literature 1,[3][4][5]9,12,13,17 but higher than some others 4 and lower than in some studies. 15 This variation in the diameter may be due to the different populations studied and the variations in age.…”