Originally Posted by
Schweinhund
That's how my landlord the podiatrist and his buddy the orthopedist who put my ankle back together twice explained it.
Two doctors are wrong?
My left Achilles tendon has titanium thread woven through it too! ooh, bionic!
I only taught a year of high school intro chemistry once, but
elemental calcium is an alkali-earth metal. Calcium in our bones is part of a mineral hydroxyapatitie, written Ca 10(PO 4) 6(OH) 2. The other dominant component of our bones are collagens. So they're really more of a mineral-matrix composite (more like carbon fiber!) than metal. I hope that's not bad news for the steel-is-real metal bike fans here!
Metals should be temperature-conducting, thermal-conducting, ductile, and malleable. Bones are not those things.
(Sorry to be pedantic.)