错畸形是由先天或后天多种因素导致的牙、颌、颅面畸形,通常被认为是一种牙颌面异常,而非一种疾病。一方面,越来越多的人期望通过正畸治疗纠正错畸形,改善口腔颜面部美观;另一方面作为一种可选择性治疗,评价一个个体是否需要接受正畸治疗,不仅取决于错畸形的严重程度,还受个体主观 Malocclusion Malformations are teeth, jaws and craniofacial deformities caused by many factors, such as congenital or acquired diseases. They are usually considered as a kind of maxillofacial abnormalities rather than a disease. On the one hand, more and more people expect orthodontics to correct the malocclusion and improve facial appearance. On the other hand, as an alternative treatment, evaluating whether an individual needs orthodontic treatment depends not only on the error严 the severity of deformity, but also subject to subjective