Cephalometric evaluation of the Assamese young adults using Tweed’s analysis

Abstract

The cephalometric norms of different ethnic and racial groups established in various studies show that normal measurements for one group are not necessarily normal for another group; each racial group must be treated according to its own characteristics. The materials used in this study consist of cephalometric radiographs of 50 subjects (23 males, 27 females) from Assamese ethnic background. The head films were traced on A4 size acetate matt paper using 3Hb pencil and Tweeds cephalometric analysis was done. Three angular parameters Frankfort mandibular plane angle (FMA), Frankfort Mandibular Incisal Angle (FMIA), Incisor mandibular plane angle (IMPA) for the Assamese population, were measured and found to be 25.4, 56.6 and 98.06 degree respectively. There was no clinical significant different between Assamese male and female but there is highly significant among the Assamese and Caucasian parametric values of Tweeds diagnostic triangle.