52. 下圖為咬耗(attrition)牙齒磨片(ground section)以透過性光(transmitted light)為光源,所拍攝之組織學照片,圖片中箭 頭所指之構造為下列何者? 
(A)牙本前質(predentin)
(B)修復性牙本質(reparative dentin)
(C)牙本質內死道(dead tract in dentin)
(D)硬化牙本質(sclerotic dentin)

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統計: A(11), B(110), C(1322), D(201), E(0) #1384088