I've had sucess with taping the split closed, and splinting the area (tying a stick to give the plant support). I actually taped the plant stalk to a light wire so that it almost hung versus having to hold itself upright. For me it happened as the buds were too heavy for the plant with three weeks left in flowering. She took a hit for sure, many leaves died....and the end result buds didn't show much growth from that point...but the trichromes did ripen.

Depending on the size of the plant and where in the cycle you could do both. Take clones so as to prune her back, but try to salvage the original.

oh...and btw....I've done it too, dropped things and crushed them...

I'm sorry for your loss