Implant and method for manufacturing same
The present invention relates to a method for manufacturing an implant, in particular an intraluminal endoprosthesis, with a body containing metallic material, preferably iron. To control the degradation of the implant, the method comprises the following steps: a) preparing the body of the implant, and b) incorporating hydrogen into at least a portion of the structure of the implant body near the surface. Furthermore, such an implant is described.
1. A method for manufacturing an implant, in particular an intraluminal endoprosthesis, with a body containing metallic material, comprising the following steps:
a) preparing the body of the implant, and
b) incorporating hydrogen into at least a portion of the structure of the implant body near the surface,
wherein the average concentration of hydrogen in the structural areas of the implant body where the incorporation takes place amounts to approximately 50 ppm to approximately 150 ppm after conclusion of the incorporation.
2. The method according to claim 1 , characterized in that hydrogen is incorporated into the structure of a boundary layer of the implant body near the surface, where the boundary layer has a maximum thickness of approximately 15 μm.
3. The method according to claim 1 , wherein to incorporate the hydrogen, at least a portion of the implant body is pickled by means of an acid and then is rinsed in distilled water.
4. A method for manufacturing an implant, in particular an intraluminal endoprosthesis, with a body containing metallic material, comprising the following steps:
a) preparing the body of the implant, and
b) incorporating hydrogen into at least a portion of the structure of the implant body near the surface,
wherein to incorporate the hydrogen, at least a portion of the implant body is immersed in an acidic to basic electrolyte system and then is connected to the cathode of a voltage source, which is optionally acted upon with a current density of approximately 0.5 A/dm 2 to approximately 2 A/dm 2 .
5. The method according to claim 4 , wherein the electrolyte system contains at least one phosphate.
6. A method for manufacturing an implant, in particular an intraluminal endoprosthesis, with a body containing metallic material, comprising the following steps:
a) preparing the body of the implant, and
b) incorporating hydrogen into at least a portion of the structure of the implant body near the surface,
wherein after the incorporation of the hydrogen, the implant body is coated with magnesium stearate and/or parylene and/or an active pharmaceutical substance on at least a portion of its surface.