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目的 研究近两年北京儿童错牙合的患病情况及特点 ,同时为预防和治疗儿童的错牙合提供参考和依据。方法 对 2 0 0 0年北京地区的 2 2 4 5名 2 .5～ 6 .5岁儿童进行错牙合情况的调查 ,统计其反牙合、开牙合和牙列拥挤的患病率 ,使用SAS统计软件进行统计分析。结果 乳牙列和混合牙列早期错牙合的患病率以反牙合为最高 ,其次是牙列拥挤 ,开牙合患病率最低 ;所调查的儿童错牙合总患病率 ,乳牙列为 9.74 % ,混合牙列为 11.17% ;反牙合的类型以前牙反牙合的患病率最高 ,郊区高于市区。结论 各种错牙合中反牙合的患病率最高 ,前牙区反牙合最常见 ,郊区高于市区 ;所调查的其他各种错牙合患病率 ,乳牙列和混合牙列早期、市区和郊区差异均无显著性
Objective To study the prevalence and characteristics of malocclusion in children in Beijing in recent two years and to provide references and evidences for the prevention and treatment of malocclusion in children. Methods A total of 2245 children (aged 2.5-5.5 years) in Beijing area were investigated for malocclusion. The prevalence of anti-occlusion, occlusal occlusion and dentition crowding were calculated. Use SAS statistical software for statistical analysis. Results The prevalence of malocclusion in early dentition and mixed dentition was highest in anti-occlusion, followed by crowded dentition and the lowest prevalence of occlusal occlusion. The total prevalence of malocclusion in children, Was 9.74%, mixed dentition was 11.17%. The type of anti-occlusion was the highest prevalence of anterior occlusal occlusion, and the suburbs were higher than the urban areas. Conclusions The highest prevalence of occlusal occlusion in various malocclusion cases is the most common. Anti-occlusion of anterior teeth area is the most common and the outskirts of urban areas are higher than urban areas. The prevalences of other malocclusions, Early, urban and suburban differences were not significant