& ltp> Orthodontics is necessary in all aspects, which will not only affect the beauty of teeth, but also affect chewing and occlusal function, facial morphology and jaw development. Therefore, orthodontics is not only to correct teeth, but also to improve and maintain the overall beauty and function of the face and mouth. & lt/p & gt； & ltp style = \ " text-align:center \ " & gt； & ltimgsrc = \ "/images/localimage.png) center without repetition; border: 1px solid # DDD \ "/& gt； & lt/p & gt； & ltp style = \ " text-align:center \ " & gt； & ltimgsrc = \ "/images/localimage.png) center without repetition; border: 1px solid # DDD \ "/& gt； & lt/p & gt； & ltp>2. Affect the face shape, resulting in disharmony of facial appearance and abnormal growth of jaw and soft tissue. The teeth are crowded or protruding, which leads to the overall imbalance of the face and presents an aging face at a young age. & lt/p & gt； & ltp>3. Sometimes it may affect pronunciation. & lt/p & gt； & ltp> Therefore, we must correct our teeth in case of irregular teeth, crowded teeth, buck teeth and ground cover, otherwise it may bring more harm. & lt/p & gt； & ltp style = \ " text-align:center \ " & gt； & ltimg src = \ "/uploadfile/image/2020225/15825953894718.png \" title = \ "Orthodontic model diagram \" alt=\" Orthodontic model diagram \ "width = \" Height: 300px \ "/>; & lt/p & gt； Science popularization of<p>& ltstrong & gt related knowledge: