Board Thread:General Discussion/@comment-10587310-20130620070434/@comment-11051098-20130620143501

I went back into the chapters and found the comments Mayuri made about broken Zanpakutôs. Before the Royal Guard showed up, he told Ichigo that "a broken Bankai never goes back to how it was". I guess that's what he referred to with "never". However, Renji was interrupted before he could release his Bankai, so it has to be the Shikai it's all about. As for that, Mayuri said that "to fix a Zanpakutô, you need the owner's spirit, reiatsu, and time to pour them into the sword".