Board Thread:General Discussion/@comment-24215505-20131217233022/@comment-1268838-20131218000553

The pre-arc information we got stated that Soul Society's healing technology advanced enough to regenerate her arm. Not unbelievable, considering Mayuri's Hojiku-Zai and Momo's organ regeneration procedure. Komamura might have had the same procedure done, or perhaps since his arm came off more cleanly, it was just reattached.