Evaluation of prevalence of dental maloccusion in junior high schools in Kerman city durind 1995-96

In order to determine the prevalence rate of dental malocclusion in permanent dentition a total of 1000 students(500 girls ans 500 boys) between the ages of 12-16 years,living in the city of Kerman were selected randomly from student population of 36670.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 52% of the girls and 58.2% of the boys,and totally 55.1% of the students had class I malocclusion.17.4% of the girls and 18.6% of the boys,totally 18% had class II malocclosion taking into accounts tha subgroups.34.6% of the girls and 30.6% of the boyys,totally 32.6% had class II malocclusion (with class II sub division).7.4% of the girls and 7.8% of the boys,totally 7.6% had class III malocclusion.6% of the girls and 3.4% of the boys,totally 4.7% had normal occlusion.no significant difference was observed between girls and boys in prevalence rate of malocclusion.