64.附圖根尖X光片中,黑色箭頭所指之放射線透過性(radiolucent)影像為何種構造? (A)neurovascular canal (B)extension of periapical lesion (C)artifact of x-ray image (D)fracture line of bone
(A)=nutrient canals 高血壓或嚴重牙周病的病人常見到營養管
64.附圖根尖X光片中,黑色箭頭所指之放射線透過性(radiolucent)影像..-阿摩線上測驗