58.根據Ellis與Davey classification of crown fractures,牙冠的部位有延伸性的斷裂且涉及到dental pulp的暴 露,屬於那一個分類?
(A)Class I
(B)Class II
(C)Class III
(D)Class IV
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統計: A(6), B(70), C(555), D(178), E(0) #1742227
統計: A(6), B(70), C(555), D(178), E(0) #1742227