Endoprosthesis comprising a magnesium alloy

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An endoprosthesis, in particular an intraluminal endoprosthesis such as a stent, comprises a carrier structure, which includes at least one component comprising a magnesium alloy of the following composition : Rare earth metals : between about 2.0 and about 5.0% by weight, with neodymium between about 1.5 and about 3.0% by weight Yttrium : between about 3.5% and about 4.5% by weight Zirconium : between about 0.3% and about 1.0% by weight Balance : between 0 and about 0.5% by weight wherein magnesium occupies the proportion by weight that remains to 100% by weight in the alloy.