5.如附圖X光片所示，側門齒曾受過撞擊造成牙根變形，稱其為： 
(A)ectopic eruption
(B)dilaceration
(C)gemination
(D)fusion

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統計： A(16), B(372), C(5), D(0), E(0) #1032020

詳解 (共 1 筆)

#6490731

補充：dilaceration定義『A developmental anomaly characterized by an abnormal bend or curve in the root or crown of a tooth』*另外彎曲通常大於20度才被視為 dilaceration。

 

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