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...problem, though. body treats the stent as foreign invader. It tries to cover it up, and over time, that can wind up clogging the artery all over again.
Some scientists and medical-device companies think they see a way to use plastics to overcome that. Several firms are working on a polymer stent that remains in place for a while and harmlessly dissolves into the bloodstream after it has done its job.
There's a lot of interest: Boston Scientific Corp. of Natick, Mass., in November invested in a new California firm working on a plastic stent, scientists in Japan are developing their own biodegradable design from poly-l-lactic acid plastic and Indianapolis-based Guidant Corp. in April bought the remaining stake of its own bioabsorbable stent joint...
NOTE: All illustrations and photos
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