Aim: To measure the vertical linear cephalometric dimensions of the anterior and posterior segments of the craniofacial complex and establish ratios between vertical linear dimensions in subjects with normal occlusion, pleasing profile, and facial harmony.
Setting And Sample Population: Department of Orthodontics, Saveetha University. Lateral cephalograms of 120 subjects of both sexes in the age group of 17-28 years with normal occlusion belonging to Chennai, India.
Materials And Methods: The vertical segments measured are anterior maxilla, posterior maxilla, and ramus-cranial floor vertical. The facial heights were measured in the anterior and posterior region of the craniofacial complex. Establish ratios and proportions between the vertical segments and different facial heights.
Results: In both the sexes, the ratio between anterior maxilla, posterior maxilla, and ramus-cranial floor vertical is 1:1:1, PTFH:ATFH is 1:1, AUFH:ATFH is 2:5, ALFH:ATFH is 3:5, PUFH:PTFH is 1:2, PLFH:PTFH is 1:2, AUDH:ALDH is 2:3, and facial depth is 2:1. PUDH:PLDH is 7:9 in females and 3:4 in males. There was a statistically significant difference in posterior total facial height:anterior total facial height ratio between the two sexes with a "P" value of 95%.
Conclusion: Thus, the anterior maxilla, posterior maxilla, and cranial floor-ramus vertical composite are in dimensional balance in subjects with normal occlusion and facial harmony. This analysis helps to identify skeletal deviations in size and position in the vertical dimension and allows the clinician to outline an appropriate treatment.
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