Rabbi Yaakov Ariel: Bionic Prosthetic Limbs Are Halachically Considered Part of the Body

According to a journalistic summary of an article in Techumin (didn’t check inside).

Rabbi Yitzchak Brand argued the same a long time ago in his book “Gerama Kema’aseh” (no link because the site is being rebuilt with a new domain).

Disclaimer: So I think.