Board Thread:General Discussion/@comment-24215505-20131217233022/@comment-29770394-20141111000839

I think Yamamoto literally couldn't get his arm back. The kido Yamamoto used involved sacrificing his arm. I think that like in FMA, that was the price that came with the deal and it cannot be restored. Of course, if Yamamoto had let Orihime heal his arm, he would have gotten it back because Orihime's power rejects previous events that have occurred to the person she is healing.