14.外傷造成脫位(luxation)的牙齒,若產生變色(discoloration)情形,下列敘述何者錯誤?
(A)僅外傷數天後即可能產生變色
(B)牙齒起初略呈粉紅色漸轉灰暗色,失去透光度
(C)變色的牙齒一般顏色不可回復,需進行根管治療
(D)可能與鈣化變態(calcific metamorphosis)有關的,呈現黃褐色傾向

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統計: A(17), B(2), C(35), D(20), E(0) #3817369

詳解 (共 1 筆)

#7416757
根據 Cohen's Pathway of the pulp, 12th edition 在 chapter 26 bleaching procedures 中針對 Tooth discoloration 的描述:
Pulpal hemorrhage due to dental trauma:if pulp survives, the tooth may eventually rever to its initial shade; if pulp necrosis occurs, the discoloration may remain and become worse.
故選項C,Luxation 導致變色的牙齒是否可恢復,應看其是否有 pulp necrosis。
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補充:Trauma related tooth avulsion 先復位固定,後續應於 7-10 days 內開始根管治療。
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