通过对江苏省昆山市中、小学生牙颌畸形的调查，结果表明安氏错■Ⅰ类所占比例最高，Ⅱ类次之，Ⅲ类最低。各类错■中，个别牙错位所占比例最高，前牙拥挤次之，再次为深覆■、对刃■、反■、深覆盖、开■及其它。本次调查显示牙颌畸形发病率为３７．５６％，属于全国平均水平。 Through the investigation of the dento-maxillofacial deformities among primary and secondary school students in Kunshan, Jiangsu Province, the results showed that the malformations of Class A were the highest, followed by Class II and the lowest in Class III. Various types of mistakes ■, the highest proportion of individual misalignment, followed by crowded front teeth, once again for the deep cover ■, ■ ■, anti ■ ■, deep coverage, open ■ and others. The survey showed that the incidence of dental malocclusion was 37.56%, belonging to the national average.