Board Thread:Theories and Speculation/@comment-32832770-20170829130028/@comment-734582-20170830091541

Elveonora wrote: But Naruto doesn't have Zetsu arm, but one made from Hashirama's cells himself, WZ were only imbued with Hashirama's cells. True, but Sakura had (and studied) Zetsu material. Compared to raw Hashirama cells, a zetsu arm seems far safer as a prosthesis. Because a Zetsu arm doesn't murder it's owner when it's low on chakra. So for Naruto's sake and Sasuke's sake, a prosthesis molded after Zetsu's cells would be far more desirable, and well within Sakura's (/tsunade's) ability.