Porous medical device and method for its manufacture
First Claim
1. Porous bioabsorbable, bioactive and load-bearing composite medical device structure having a bioabsorbable matrix and reinforcing structure, said structure further comprising:
- a plurality of textile planar layers, said layers being formed of continuous fibrous elements and being placed on top of each other to form a structure having two dimensions which are nonparallel to each other and a third dimension originating from piling of said planar layers on top of each other;
a plurality of openings extending through said layers, said openings being defined by portions of said continuous fibrous elements extending substantially in the direction of said plane and existing in the textile planar layers prior to placing them on top of each other;
a plurality of passages extending through said structure, said passages being formed of the openings in different textile planar layers placed on top of each other;
a reinforcing structure formed by reinforcing bioactive ceramic elements included in said continuous fibrous elements; and
a bioabsorbable matrix formed by bioabsorbable polymer matrix material also included in said continuous fibrous elements.
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Abstract
Porous bioabsorbable, bioactive and load-bearing composite medical device structure includes a plurality of regular textile planar layers (1a, 1b . . . ) formed of continuous bioabsorbable polymer matrix and bioceramic fibers acting as reinforcements, both included in continuous fibrous elements (3) forming the textile layers. The layers are placed on top of each other to form a structure having two dimensions (x, y) at right angles to each other according to the two dimensions of the textile layer and a third dimension (z) perpendicular to them and resulting from the piling of the layers. A plurality of passages extend through the layers as a result of the openings (2) defined by portions of the continuous fibrous elements (3) extending substantially in the direction of the plane. The continuous fibrous elements (3) comprise both bioactive ceramic reinforcing fibers which form a reinforcing structure and a bioabsorbable polymer matrix material which forms a matrix which binds the layers together and also binds the portions of continuous fibers defining the openings together, thereby forming the passages and stiffening the structure. This bioactive and bioabsorbable composite structure is suitable to be used as a basic structure in medical devices, especially in osteochondral applications where the load-bearing properties of implant are required.
104 Citations
53 Claims
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1. Porous bioabsorbable, bioactive and load-bearing composite medical device structure having a bioabsorbable matrix and reinforcing structure, said structure further comprising:
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a plurality of textile planar layers, said layers being formed of continuous fibrous elements and being placed on top of each other to form a structure having two dimensions which are nonparallel to each other and a third dimension originating from piling of said planar layers on top of each other;
a plurality of openings extending through said layers, said openings being defined by portions of said continuous fibrous elements extending substantially in the direction of said plane and existing in the textile planar layers prior to placing them on top of each other;
a plurality of passages extending through said structure, said passages being formed of the openings in different textile planar layers placed on top of each other;
a reinforcing structure formed by reinforcing bioactive ceramic elements included in said continuous fibrous elements; and
a bioabsorbable matrix formed by bioabsorbable polymer matrix material also included in said continuous fibrous elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53)
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- 10. A structure according to claim, wherein the reinforcing bioactive ceramic elements are fibers.
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26. A method of manufacturing a porous bioabsorbable, bioactive and load-bearing composite medical device, the method comprising:
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providing a plurality of textile planar layers, said layers being formed of continuous fibrous elements and having each a plurality of openings defined by portions of said continuous fibrous elements, said fibrous elements comprising a bioabsorbable matrix formed by bioabsorbable polymer matrix material and reinforcing ceramic elements;
placing said textile planar layers on top of each other to form a piled structure having two dimensions at right angles to each other and a third dimension perpendicular to them and originating from piling of said textile layers on top of each other, the piled structure having passages extending through said structure and formed of the openings in different textile planar layers. - View Dependent Claims (27, 28, 29)
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Specification