The Scandinavian Total Ankle Replacement (STAR) system recently received FDA approval. Wilmington, Delaware-based Enovis said it’s the first and only mobile-bearing ankle system with e+ Polyethylene in the U.S. The implant’s new, vitamin E-blended e+ Polyethylene insert offers improved durability, stability and longevity, according to a news release.

e+ Polyethylene contains the free radical-neutralizing antioxidant vitamin E. This helps resist oxidation and maintain consistent wear rates and stable mechanical properties over time. According to Enovis, other highly crosslinked polyethylenes need remelting during manufacturing to neutralize free radicals. That process can reduce the polyethylene’s mechanical strength by up to 12%, the company said.