OBJECTIVETo investigate the prevalence of malocclusion in China.

METHODSBased on individual normal occlusion and Angle's classification of malocclusion, standard investigation form was made. 25,392 children of different dental ages were evaluated by orthodontic professionals.

RESULTSThe prevalence of malocclusion among Chinese children was 67.82%. The prevalence of malocclusion among children with different dental age and the proportion of the different types of malocclusions were revealed.

CONCLUSIONThe prevalence of malocclusion among Chinese children had increased from 40% to 67% over the last 40 years.

Child ; Child, Preschool ; China ; epidemiology ; Female ; Humans ; Male ; Malocclusion ; classification ; epidemiology ; Mass Screening ; methods ; Prevalence