User blog comment:AYET/Who will come?/@comment-4754162-20130626020636/@comment-4754162-20130627013950

Good question Vaz. I think that scenario is same as asking "If Ace's head has been decapped while cuffed, will he regenerate it after the cuffs were removed".

I am guessing the answer is no. The kairoseki cuff nullify the presence of DF ability, thus in Ace's case, he will premanently die. So if it happen to Brook, he will also permanently die.