我儿子今年7岁,刚换的两颗门牙显得特别大,而且牙缝很宽,同学给他起了个外号叫“兔子牙”。为此他闷闷不乐,见人就紧紧地闭着嘴巴。前两天我带儿子到医院口腔科就诊,医生检查后说他的情况属于暂时错颌畸形,多见于六七岁的孩子。在此,我想详细咨询一下:这种畸形是怎么引起的?它有什么危害?如何矫治?——读者冯女士 My son is 7 years old this year, just changing the two front teeth appear particularly large, and the teeth wide, students gave him a nickname “rabbit teeth ”. To this end he sullen, see people tightly shut up. Two days ago, I took my son to the hospital for stomatology. After the doctor checked, he said that his condition was temporarily wrong jaw deformity, which was more common in children aged six or seven. Here, I would like to consult in detail: How is this deformity caused? What harm it is? How to correct? - Reader Ms. Fung