Last May a nearby tree uprooted and fell onto a 30 ft tall shagbark hickory. The top of the hickory was almost touching the ground. After I removed the offending tree the following day, the hickory only had a few broken branches but only stood up about 45 degrees. It has recovered a little more since then, and is currently in the condition shown in the photo below. Is there anything I can do improve its odds of returning to normal? I can reach the entire tree with a pole pruner.