Porous devices and processes for producing same
AssigneeVertera, Inc.
InventorsWei-Hsiang Chang, Stephen Lee Laffoon, Christopher S. D. Lee, David Lee Safranski
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Abstract
A method for making a polymer with a porous layer from a solid piece of polymer is disclosed. In various embodiments, the method includes heating a surface of a solid piece of polymer to a processing temperature and holding the processing temperature while displacing a porogen layer through the surface of the polymer to create a matrix layer of the solid polymer body comprising the polymer and the porogen layer. In at least one embodiment, the method also includes removing at least a portion of the layer of porogen from the matrix layer to create a porous layer of the solid piece of polymer.
Claims28
A medical device for promoting tissue ingrowth, the medical device comprising a thermoplastic body defining a porous surface formed from a plurality of pores, each of the pores extending a defined distance from a first face into the thermoplastic body, wherein:
- the thermoplastic body comprises a first particular percentage of hydroxyl groups;
- the porous surface comprises a second particular percentage of hydroxyl groups, wherein the second particular percentage of hydroxyl groups is greater than the first particular percentage of hydroxyl groups;
- an interconnectivity between the plurality of pores is at least 99%;
- and
- an interfacial shear strength between the porous surface and the thermoplastic body is at least about 17 MPa.
A medical device for promoting tissue ingrowth, the medical device comprising a body defining a porous surface formed from a plurality of pores, each of the pores extending a defined distance from a top face into the body, and at least one marker for detecting the medical device on an x-ray, wherein:
- the body comprises a first particular percentage of hydroxyl groups;
- the porous surface comprises a second particular percentage of hydroxyl groups, wherein the second particular percentage of hydroxyl groups is greater than the first particular percentage of hydroxyl groups;
- an interconnectivity between the plurality of pores is at least 99%;
- and
- an interfacial shear strength between the porous surface and the body is at least about 17 MPa.
A medical device for promoting tissue ingrowth, the medical device comprising a thermoplastic body defining a porous surface formed from a plurality of pores, each of the pores extending from a top face into the thermoplastic body, and at least one tantalum marker for detecting the medical device on an x-ray, wherein:
- the thermoplastic body comprises a first particular percentage of hydroxyl groups;
- the porous surface comprises a second particular percentage of hydroxyl groups, wherein the second particular percentage of hydroxyl groups is greater than the first particular percentage of hydroxyl groups;
- an interconnectivity between the plurality of pores is at least 99%;
- and
- the porous surface has a particular wettability, and wherein the particular wettability is greater than a wettability of the thermoplastic body.
Dependencies are inferred from the claim text.