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我国的正畸工作者曾在各地进行了牙颌畸形发生率的调查,至今为止报道以个别正常(牙合)为标准,其错(牙合)发生率最高为83.19％,最低为29.33％。为了解天津市中学生恒牙列错(牙合)发生情况,作者于1987年5月至10月对本市14—19岁中学生共计2350名进行了调查和分析,调查结果如下: 调查标准和方法正常(牙合):牙列整齐,上下牙(牙合)关系正常,上下牙弓、颌骨与颅面关系协调,无明显异常。个别正常(牙合):凡有轻微牙齿、颌骨及颅面异常,但对健康、功能、发育及美观无明显影响且不必作矫治者。错(牙合):凡有明显牙齿错位,牙齿排列和牙弓形态
Orthodontic workers in our country have carried out a survey of the incidence of dental malocclusion in various places. Up to now, the incidence of malocclusion has been reported as 83.19% and the lowest is 29.33%. In order to understand the occurrence of permanent dentition mismatch among secondary school students in Tianjin, the author conducted a survey and analysis on a total of 2350 secondary school students aged 14-19 from May to October in 1987. The findings are as follows: The survey standard and method are normal (Occlusal): dentition neat, upper and lower teeth (occlusal) normal relationship between the upper and lower dental arch, jaw and craniofacial coordination, no significant abnormalities. Individual normal (occlusion): Where there is a slight tooth, jaw and craniofacial abnormalities, but no significant effect on health, function, development and aesthetics and do not have to be treated. Wrong (occlusion): Where there is significant dislocation of teeth, dental alignment and dental arch