Evaluation of prevalence of dental maloccusion in junior high schools in Kerman city durind ۱۹۹۵-۹۶

In order to determine the prevalence rate of dental malocclusion in permanent dentition a total of ۱۰۰۰ students(۵۰۰ girls ans ۵۰۰ boys) between the ages of ۱۲-۱۶ years,living in the city of Kerman were selected randomly from student population of ۳۶۶۷۰.their characteristics that were examined included:profile,numbrt of teeth present in month,reletionship brtween molar and caning teeth(according to the angle,s classification),overjet,crossbite,midline,crowding,spacing,mulformed teeth,supernumerary teeth in mouth,cleft lip and cleft palate and type of malocclusion.the findings showed that ۵۲% of the girls and ۵۸.۲% of the boys,and totally ۵۵.۱% of the students had class I malocclusion.۱۷.۴% of the girls and ۱۸.۶% of the boys,totally ۱۸% had class II malocclosion taking into accounts tha subgroups.۳۴.۶% of the girls and ۳۰.۶% of the boyys,totally ۳۲.۶% had class II malocclusion (with class II sub division).۷.۴% of the girls and ۷.۸% of the boys,totally ۷.۶% had class III malocclusion.۶% of the girls and ۳.۴% of the boys,totally ۴.۷% had normal occlusion.no significant difference was observed between girls and boys in prevalence rate of malocclusion.

Keywords:

Prevalence , dental malocclusion , students of junior high schools