52.與傳統牙冠增長術相比,關於生物修形(biologic shaping)的敘述,下列何者正確?
(A)增加牙冠對牙根比例(crown to root ratio)
(B)100%去除牙齒原有的修形邊緣(existing margin)
(C)不改變原有的角化組織(keratinized tissue)
(D)術後牙齦下牙根(subgingival root)較難清潔
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統計: A(150), B(215), C(231), D(56), E(0) #3379193
統計: A(150), B(215), C(231), D(56), E(0) #3379193