Many years after a youthful life with several motorcycles, including one broken leg, the knee on that leg needs replacement. At a pre-surgical orientation meeting the nurse passed around a couple of knees. They are heavy suckers - maybe 3# - look like ordinary stainless but turn out to be a Cobalt - Chromium alloy. The outside surface is highly polished so it can slide on the plastic insert but the inside surface looks like unfinished casting, which I assume is deliberate in order to provide a better surface for the cement.
Orthopedic surgeons are the evolution of 'sawbones', sort-of kind-of the way folks who program CNC equipment are the evolution of blacksmiths. I think in a lot of ways blacksmiths understand more about metal than CNC programmers. Now let's see, this means my surgeon ? Well, I hope he turns out to be an artist with CNC.
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