伴有骨骼(ge)異常或妨礙功能的牙(ya)頜畸形(xing)應及早矯(jiao)(jiao)治；如(ru)前牙(ya)帆頜應一發現就(jiu)矯(jiao)(jiao)治。其他傳(chuan)頜畸形(xing)可在(zai)恒牙(ya)初(chu)期開始矯(jiao)(jiao)治。

　　矯(jiao)(jiao)(jiao)正(zheng)(zheng)(zheng)(zheng)器有3種(zhong)：①固定(ding)(ding)矯(jiao)(jiao)(jiao)正(zheng)(zheng)(zheng)(zheng)器。國(guo)內外 流行的(de)(de)有Begg細絲(si)弓(gong)矯(jiao)(jiao)(jiao)正(zheng)(zheng)(zheng)(zheng)器和方絲(si)弓(gong)矯(jiao)(jiao)(jiao)正(zheng)(zheng)(zheng)(zheng)器。主要(yao)借助于粘在牙(ya)(ya)上的(de)(de)托槽(cao)及各種(zhong)金屬弓(gong)絲(si)共同作用(yong)，產生機(ji)械(xie)力(li)(li)，使(shi)牙(ya)(ya)齒(chi)(chi)向(xiang)預定(ding)(ding)的(de)(de)位(wei)置(zhi)移(yi)(yi)動，達到(dao)矯(jiao)(jiao)(jiao)正(zheng)(zheng)(zheng)(zheng)目的(de)(de)。屬于高(gao)效(xiao)能(neng)(neng)(neng)矯(jiao)(jiao)(jiao)正(zheng)(zheng)(zheng)(zheng)技術。②功能(neng)(neng)(neng)性(xing)矯(jiao)(jiao)(jiao)正(zheng)(zheng)(zheng)(zheng)器。利用(yong)肌肉功能(neng)(neng)(neng)力(li)(li)與(yu)矯(jiao)(jiao)(jiao)正(zheng)(zheng)(zheng)(zheng)器共同作用(yong)，使(shi)畸形得以矯(jiao)(jiao)(jiao)正(zheng)(zheng)(zheng)(zheng)。主要(yao)適于早期骨性(xing)牙(ya)(ya)頜畸形。③可(ke)摘(zhai)矯(jiao)(jiao)(jiao)正(zheng)(zheng)(zheng)(zheng)器。患(huan)者可(ke)自(zi)行摘(zhai)戴，靠各種(zhong)彈簧等產生的(de)(de)機(ji)械(xie)力(li)(li)，矯(jiao)(jiao)(jiao)正(zheng)(zheng)(zheng)(zheng)錯頜。其(qi)移(yi)(yi)動牙(ya)(ya)齒(chi)(chi)的(de)(de)能(neng)(neng)(neng)力(li)(li)不如固定(ding)(ding)矯(jiao)(jiao)(jiao)正(zheng)(zheng)(zheng)(zheng)器。

　　對于伴(ban)有明顯骨骼異常的成年人牙(ya)頜畸(ji)形，常需要正頜外科(ke)與正畸(ji)共同合作，進行矯治。

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