中文摘要：

目的了解云南省昆明市市区乳牙列错[牙合]情况，为乳牙期错[牙合]畸形的预防性和阻断性矫治提供依据。方法对昆明市市区3所幼儿园的乳牙全萌出且达到[牙合]接触的2116名乳牙列儿童进行调查，计算其错[牙合]畸形发病率。结果在2116名乳牙列儿童中，错[牙合]1516名，错[牙合]率72％。排列在错[牙合]前6位的依次是：深覆[牙合]、牙列拥挤、前牙反[牙合]、切[牙合]、乳牙早失、开[牙合]。结论昆明市市区乳牙列错[牙合]率的数据报告显示其发病率较高，需加强乳牙列错[牙合]畸形的防治。

英文摘要：

Objective This 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. Methods A 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. Results The 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. Conclusion The rate of malocclusion of primary dentition in Kunming City is high. Much work should be done to prevent or treat malocclusion of primary dentition.