ouch.... yeah that could be a problem. I did this not too long ago.. I should have started curing mine before the stems actually snapped.. but I waited until the stems were dry enough to break.. but by then the buds were WAY too dry... and it was just too late. I just used the buds for hash... along with all the fan leafs and stems. Came out with about 4.8 grams of some nice hash.
You could try and rehydrate them... but even if that works out for ya... the buds will never cure out to what they could have originally been the first time. It sucks.. but it can happen and does happen.
Good luck!
peace.