Indeed — his arm does seem to be the only thing to be actually hurt.

Instead of actually answering, Law seems to be contemplating something.

"If I had the Polar Tang, I could probably put those back. But without the equipment... there's too much risk for the internal organs to be damaged. The best I can do is cut some of the tissue that's around the bones, it might help with the movement."

And then, with a nod to his arm, "Have those been changed?" He means the bandages.