Bi-phasic compressed porous reinforcement materials suitable for implant
First Claim
1. A biphasic porous implantable device suitable for implantation in a living being, said porous implantable device comprising a high density porous zone and a low density porous zone, wherein said high density porous zone is created through a compression process applied to at least one part of a bioresorbable porous polymer material, wherein said compression process causes the sacrifice of at least some pores forming said high density porous zone, and wherein at least one part of said porous material is at least partially protected from compression thereby forming said low density porous zone.
2 Assignments
0 Petitions
Accused Products
Abstract
A high strength porous biphasic polymeric reinforcement material manufactured by a compression and/or sintering process is disclosed. The material results in a network of interconnected collapsed pores, which forces thin overlapping walls and passages to be created. The network provides permeable access for fluid migration throughout the material. The strength and/or permeability are advantageous for medical devices and implants.
929 Citations
13 Claims
- 1. A biphasic porous implantable device suitable for implantation in a living being, said porous implantable device comprising a high density porous zone and a low density porous zone, wherein said high density porous zone is created through a compression process applied to at least one part of a bioresorbable porous polymer material, wherein said compression process causes the sacrifice of at least some pores forming said high density porous zone, and wherein at least one part of said porous material is at least partially protected from compression thereby forming said low density porous zone.
-
13. A method of producing a high density, high strength porous matrix sheet containing low-density zones comprising:
-
a) providing a high porosity polymeric matrix sheet; b) inducing glass-transition within said porous polymeric matrix sheet; c) applying a compressive force within one or more dimensions using a plate containing shaped cavities, wherein the shaped cavities allow for less compression than the areas of the plate surrounding the cavities to achieve a new size or shape; d) holding the porous polymer matrix sheet above glass transition at the new size and shape for a period of time allowing the molecular chains within the matrix sheet that are under compression to rotate or move to a lower energy state; and e) cooling the porous polymer to below the glass-transition wherein the polymer matrix sheet maintains the new size or shape.
-
Specification