Speciation Analysis on Hard Tissue Profile of 88 Adolescents with Normal Occlusion in Guizhou Province

Objective: To study craniofacial structure of 88 adolescent with normal occlusion in Guizhou province,and to obtain normal cephalometric values in Guizhou province,and so as to provide reference for clinical and scientific research of orthodontic and orthognathic surgery.Methods: Eighty-eight students with normal occlusion were selected from 789 technical secondary school students in Guizhou province according to the standards of Andrews normal occlusion.X-ray lateral radiographic films were photographed.WinCeph 7.0 cephalometric analysis computer system was employed to study 30 items about craniofacial structure,and the data were analyzed.Results: The normal cephalometric values of adolescents with normal occlusion in Guizhou province was established for the first time.Conclusions: The cephalometric values of adolescent with normal occlusion are various in different regions.It is important to establish normal standard values of different regions to provide reference for clinical and scientific research of orthodontic and orthognathic surgery.