ObjectiveThis study determined the malocclusion of primary dentition in Kunming City residents in Yunnan Province and to provide evidence of malocclusion of primary dentition preventive orthodontics and interceptive orthodontics.MethodsA total of 2 116 children who have primary dentition were surveyed from three kindergarten schools in Kunming City. Cross-section survey and malocclusion rate calculation were performed.ResultsThe survey showed that 1 516 out of 2 116 children have malocclusion, with a rate of 72%. The most important types of malocclusion in primary dentition are overbite, dental crowding, anterior cross bite, edge-to-edge bite, early loss of deciduous teeth, and open bite.ConclusionThe rate of malocclusion of primary dentition in Kunming City is high. Much work should be done to prevent or treat malocclusion of primary dentition.
