News | May 21, 2010

Biodegradable Stent Preserves Mechanical Strength

May 21, 2010 – Results of an in vivo study of 48 porcine arteries implanted with a biodegradable stent showed biodegradation is measurable and begins at the first day of implant. However, high radial strength is maintained during biodegradation.

These results were released this week by Arterial Remodeling Technologies (ART), which is developing bioresorbable coronary polylactic acid polymer stents that promote the natural remodeling of an injured artery after angioplasty.

Previous validating data regarding ART’s next-generation bioresorbable stent approach has been published in the January 2010 special supplement of EuroIntervention. The paper was authored by Antoine Lafont, M.D., Ph.D., Head, Interventional Cardiology Department, Georges Pompidou Hospital, Paris.

The stent is designed to provide an impermanent scaffold that will dismantle and loose its primary mechanical function after three months. This is the period when most experts say is it is necessary to permit the healing process to stabilize the artery following the trauma caused by an angioplasty. The complete resorption of all the polymer is estimated to occur within 18 months.

ART said its stent is designed to have several competitive benefits over existing bioresorbable stents in development. These include faster and smoother resorption, use of a non-crystalline polymer, better stress diffusion, and crack-free expansion. The ART device is designed for conventional balloon stent delivery and meets the market standard of 6 French compatibility.

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