More than a million times a year, a U.S. surgeon slices open a knee, strips out worn cartilage, caps the leg bones with metal, and drops in a plastic spacer to allow the new joint to glide. While knee ...
More than a million times a year, a U.S. surgeon slices open a knee, strips out worn cartilage, caps the leg bones with metal and drops in a plastic spacer to allow the new joint to glide. But while ...
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