58.下列手術何者無法解決臨床牙冠不足(short clinical crown)的問題?
(A)強逼萌出(forced eruption)
(B)游離齒齦移植術(free gingival graft)
(C)根向移位翻瓣術(apically positioned flap)
(D)牙冠增長手術(crown lengthening procedure)

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