A.0.16×0.022英寸 B.0.18×0.22英寸 C.0.18×0.025英寸 D.0.22×0.25英寸 E.0.22×0.028英寸
A.不超過(guò)4mm B.4.5mm C.3mm D.2.5mm E.2mm
A.絲圈應(yīng)離開(kāi)牙槽嵴0.5mm B.絲圈應(yīng)離開(kāi)牙槽嵴0.5~1mm C.絲圈應(yīng)離開(kāi)牙槽嵴1~2mm D.絲圈應(yīng)離開(kāi)牙槽嵴2~3mm E.與牙槽嵴貼近