A.2~3mm B.3~4mm C.4~5mm D.5~6mm E.6mm以上
A.不超過4mm B.4.5mm C.3mm D.2.5mm E.2mm
A.絲圈應(yīng)離開牙槽嵴0.5mm B.絲圈應(yīng)離開牙槽嵴0.5~1mm C.絲圈應(yīng)離開牙槽嵴1~2mm D.絲圈應(yīng)離開牙槽嵴2~3mm E.與牙槽嵴貼近