Method for Producing a Biocompatible Implant, and Implant
The present invention provides a method for producing a biocompatible implant and a corresponding biocompatible implant. The biocompatible implant ( 10 ) has an implant body ( 8 ) composed of a polyaryletherketone plastic, wherein the implant body ( 8 ) has at least one first porous section ( 12 ) and one second porous section ( 13 ), wherein the first porous section ( 12 ) and the second porous section differ with respect to their porosity.
1 . A method for producing a biocompatible implant, comprising the following steps:
providing a plastics powder composed of a polyaryletherketone;
heating and pressing the plastics powder to form at least one intermediate piece;
mechanically comminuting the at least one intermediate piece to form a granular material; and
thermally bonding the granular material in a mold to form an implant, wherein the at least one granular material is exposed to a spatially inhomogeneous heat distribution during the thermal bonding, wherein the implant has an implant body having at least one first porous section and one second porous section, wherein the first porous section and the second porous section differ with respect to their porosity.
2 . The method as claimed in claim 1 , wherein the mold is heated with a plurality of heating devices which are each activated separately during the thermal bonding of the granular material in order to produce the inhomogeneous heat distribution.
3 . The method as claimed in claim 1 , wherein the polyaryletherketone is polyetheretherketone.
4 . The method as claimed in claim 1 , wherein the granular material comprises particles having a round, rounded, partially angular or polygonal cross section.
5 . The method as claimed in claim 1 , wherein the granular material comprises particles having a round cross section.
6 . The method as claimed in claim 1 , wherein, before the preparation of the granular material, the plastics powder is subjected to an antimicrobial treatment and/or a bioactive component is admixed in the plastics powder.
7 . The method as claimed in claim 1 , wherein the granular material has a particle size of between 1 μm and 3000 μm.
8 . The method as claimed in claim 1 , wherein the mold is filled with a plurality of granular materials differing with respect to their particle size and/or particle shape before the thermal bonding of the granular material.
9 . The method as claimed in claim 1 , wherein the mold exerts a specifiable pressure on the at least one granular material during the thermal bonding of the granular material.
10 . The method as claimed in claim 1 , wherein the mold comprises a shaping means which forms a cavity within the implant body during the thermal bonding of the granular material.
11 - 24 . (canceled)