61. 進行唇繫帶切除手術(labial frenectomy)時，下列何種術式不是以繼生性上皮形成 (secondary epithelialization)的方式癒合？
(A)simple excision technique
(B)Z-plasty technique
(C)localized vestibuloplasty with secondary epithelialization
(D)laser-assisted frenectomy

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