not a direct match* — the

Silk was used, and they made silk screws. One of the advantages of silk screws is they're not too stiff. One of the biggest problems we have with medical implants — you break a bone really badly and they go in, they put a metal plate, could be titanium, could be stainless, and they screw it together with titanium or stainless screws. You don't mix metals because they tend to create galvanic corrosion. They're stiff and unyielding compared to the bone. Bone's got a modulus that — it's not on here, but bone is probably down in this range.