To improve her facial profile and to achieve normal occlusion , she accepted the orthodontic treatment combined with orthognathic surgery ( bilateral vertical ramus osteotomy ) 為改善外貌與咬合的異常,病患接受了齒顎矯正與下顎雙側(cè)矢狀垂直截骨術(shù)的治療。
The six - year molars are the first permanent molars which erupt at the age of six . there are a total of four six - year molars , one in each quadrant , situated right behind the last primary molars . the four molars are vital to the normal occlusion of permanent teeth 小朋友六歲時(shí),他下頜乳臼齒后面長(zhǎng)出大牙齒,即第一大臼齒,共有四只,位置在口腔四端乳臼齒的后面,由于通常在六歲左右長(zhǎng)出,故稱為六歲齒。