小明的爸爸妈妈工作很忙,经常出差,所以常将小明放在爷爷奶奶家或朋友家,转眼小明已经8岁,上小学2年级了,但最近爸爸妈妈回来,却看着小明不对劲,看来看去才觉得是牙的排列有问题,他们互相看看,两人的牙齿都很整齐,孩子怎么会这样?便急忙来到口腔医院。正畸科医生经过仔细检查发现小明轻度的上颌前突和下领后缩,前牙局部小开(牙合),询问后发现小明有啃指头,也就是吮指习惯。“许多小孩都有这习惯, Xiao Ming’s father and mother work very busy, often travel, so often put Xiao Ming at his grandparents home or a friend’s house, an instant Xiaoming already 8 years old, sophomore, but Mom and Dad back recently, but looked at Xiao Ming wrong, it seems Looked to think that there is a problem with the arrangement of teeth, they look at each other, both teeth are neat, how children will be like this? Hurriedly came to the Stomatological Hospital. Orthodontists found after careful examination Xiaomin mild maxillary protrusion and collar collar retraction, anterior small local open (occlusion), asked to find Xiaoming chewed fingers, which is sucking means habit. ”Many children have this habit,