Bioerodible endoprosthesis

A - Human Necessities – 61 – L

Patent

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Details

A61L 31/02 (2006.01) A61L 31/14 (2006.01)

Patent

CA 2727568

An endoprosthesis can include a body including an underly-ing portion and a surface portion overlying the underlying portion. The underlying portion can include a bio-erodible metal in the form of a matrix and corrosion enhancing deposits within the matrix. The surface portion including the bioerodible metal of the matrix. The surface portion having a first erosion rate when exposed to a physiological environment and the underlying portion having a second erosion rate when exposed to a physi-ological environment that is greater than the first erosion rate.

L'invention concerne une endoprothèse qui présente un corps qui contient une partie sous-jacente et une partie de surface qui recouvre la partie sous-jacente. La partie sous-jacente peut contenir un métal bioérodable sous la forme d'une matrice et des dépôts de renforcement de la corrosion à l'intérieur de la matrice. La partie de surface contient le métal bioérodable de la matrice. La partie de surface présente un premier taux d'érosion lorsqu'elle est exposée à un environnement physiologique et la partie sous-jacente présente un deuxième taux d'érosion lorsqu'elle est exposée à un environnement physiologique supérieur au premier taux d'érosion.

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