Contact: Marcia Goodrich
Michigan Technological University
Caption: This series of scanning electron microscope images illustrates the corrosion of zinc wire implanted in rats' arteries at 1.5 months, 3 months, 4.5 months and 6 months. The wires degraded at a rate just below 0.2 millimeters per year -- the "magic" value for bioabsorbable stents -- for the first three months. After that, the corrosion accelerated, so the implant would not remain in the artery for too long.
Credit: SEM image by Patrick Bowen
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