Study and drawing of stanard curve of body height and weight for orthodontics

Objective:To study and trace the standard growth curve of body height and weight of adolescent n ZhaoQing area for oruhdontic diagnosis and treatment planning. Method:Based on the general assessment data of 19 968 students(7-18 years) in ZhaoQing, the body height were measured and the standard curve of body height and weight was drawn.Result: Under 12 years ,the annual increment of body height and weght was similar for both sexes. Above 12 year, the annual body height and weight increment of girls was slower than that of boys.The annual body weight increment peak was between 11-12 years for girls and 13 years for boys.Conclusion:the standard growth curve of body height and weight plays an impotant role in the orthodontics diagnosis and treatment planning.