rementofthewidthofthearcofthebasalbone牙冠宽度的测量measurementoftoothsize牙弓拥挤度分析/间隙分析spaceanalysis整平Spee曲线曲度levelingthecurveofSpee牙弓对称性symmetryofdentalarch牙量不协调toothsizediscrepancy磨牙近中关系mesialmolarrelationship磨牙远中关系distalmolarrelationship邻面去釉enamelreductionX线头影测量cephalometrics头颅定位仪cephalometer蝶鞍点S.sella鼻根点N.nasion耳点P.porion颅底点Ba.basion眶点O.orbitale翼上颌裂点Ptm.pterygomaxillaryfissure前鼻棘点ANS.anteriornasalspine上齿槽座点A.subspinale下齿槽座点B.supramental上齿槽缘点SPr.superiorprosthion下齿槽缘点Id.infradentale上中切牙点UI.upperincisor下切牙点Li.Lowerincisor髁顶点Co.condyline关节点Ar.articulare下颌角点Go.gonion颏前点P.pogonion颏下点Me.menton颏顶点Gn.gnathion额点G.glabella软组织鼻根点NS.nasionofsofttissue眼点E.eye鼻下点Sn.subnasale唇缘点vermilionborders软组织颏前点Pos.pogonionofsofttissue软组织颏下点Mes.mentonofsofttissue颅底平面basionplane前颅底平面SN.SNplane面横平面Frankforthorizontalplane
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