Porous metal overlay for an implant surface
First Claim
1. A porous metal overlay for an implant surface comprising a plurality of layers of stacked metal grids having a controlled reduction of pore size from an outer surface to an opposite inner surface, each said layer having a plurality of pores therein with the size of said pores being of decreasing size in a direction form said outer surface of said overlay to said opposite inner surface.
3 Assignments
0 Petitions
Accused Products
Abstract
The porous metal overlay for an implant surface is comprised of a plurality of layers of stacked metal grids. Each layer is provided with pores which are of a size which decrease in the direction of the implant surface steadily, that is, without enlargement in an intermediate layer. The progressively decreasing porous sizes provide for a steady ingrowth and nourishment of the ingrowing tissue.
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Citations
17 Claims
- 1. A porous metal overlay for an implant surface comprising a plurality of layers of stacked metal grids having a controlled reduction of pore size from an outer surface to an opposite inner surface, each said layer having a plurality of pores therein with the size of said pores being of decreasing size in a direction form said outer surface of said overlay to said opposite inner surface.
- 6. A porous structure for a bone implant comprising a plurality of stacked layers of metal grids, each layer having a uniform porosity with a plurality of pores therein, said layers having a controlled reduction of pore size with the pore size of each layer decreasing in size from one surface of the structure to an opposite surface of the structure.
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12. In combination
an anchoring shank for a prosthesis; - and
a plurality of layers of metal grids secured to said shank for an accretion of tissue therein, each layer having a plurality of pores therein with the pore size of each layer decreasing in size from a layer remote from said shank to a layer adjacent said shank to provide a controlled reduction of pore size from said remote layer to said layer adjacent said shank whereby ingrowing tissue is able to ramify without interruption by an enlargement of said pores in an intermediate layer. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification