RESUMO
Background: cephalometry discusses different measures of the head and face and having this information is very important in foreseeing the scale of growth of the skull. By having the dimensions of the skull we are able to calculate the weight, volume and index of the brain. Acknowledging the above mentioned information can be helpful for the evaluation of health of sickness in infants, youth and in the elderly
Materials and Methods: this research was done under the cross-sectional method. 560 Samples of boys between the ages of 18-20 in the city of Tehran were studied. All were sane and none of them contained any effective disease. The weight was measured with the minimum amount of clothes and by German scale called Sohnel with 0/5 mm accuracy, the length and width of the face was measured by the Martinsaler scaled cephalometre weight was measured with 0/5 Kg accuracy and height by stadiometer with 1 mm accuracy. Then the weight, volume and index of the brain were measured
Results: the mean of the length of the head in boys between the ages of 18-22 year olds were as follows: 188/7 + 7/7 and 188/6 +8/7 millimeter, Width: 152/7 + 6/5 and 156 + 6/9 millimeter, Height: 69/7 + 11/5 and 70/8 + 10/5, Auricular Height: 132/1 + 7/1 and 133/4 + 8/1 millimeters, Brain Volume: 1411/4 + 76/8 and 1438/5 + 11, Brain Weight: 1460/8 + 82/6 and 1488/8 + 114/9, Brain Index: 2/1 + 0/3 and 2/1 +]/3
Conclusion: the length of the head in between the ages of 18-22 has not changed but the weight, auricular height, volume and weight of the brain have ascended. However the brain index has been the same in all ages [except for 19 year olds]