X线片上判断牙槽骨高度降低的标准是牙槽嵴顶A与釉牙骨质界平齐 B到釉牙骨质界的距离小于1mmC到釉

X线片上判断牙槽骨高度降低的标准是牙槽嵴顶

A与釉牙骨质界平齐

B到釉牙骨质界的距离小于1mm

C到釉牙骨质界的距离小于2mm

D到釉牙骨质界的距离大于2mm

E到釉牙骨质界的距离大于3mm