Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Reexamination Certificate
1998-05-14
2001-07-17
Willse, David H. (Department: 3738)
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
C427S002260, C427S002270
Reexamination Certificate
active
06261322
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates generally to the field of in vivo implants. More particularly, preferred embodiments of the invention are directed to an orthopedic prosthesis having a composite coating to promote tissue in-growth and/or tissue on-growth.
2. Discussion of the Related Art
Prior art implants are known to those skilled in the art. For example, conventional implants are typically composed of stainless steel, cobalt-chrome, or titanium alloy.
A problem with this technology has been that the best substrate materials are not the best materials to be in contact with living tissue. Therefore, what is required is a solution that can provide a biocompatible coating on a substrate.
One approach in an attempt to solve the above-discussed problems involves simply coating an implant substrate with a biocompatible material. However, a disadvantage of this approach is that biocompatible materials are often soft or brittle.
Another disadvantage of this approach has been relatively high cost and/or technical complexity. Therefore, what is also needed is a solution that meets the above-discussed requirements in a more simple and cost effective manner.
Heretofore, the requirements of good substrate properties, and good coating properties referred to above have not been fully met in combination. What is needed is a solution that simultaneously addresses both of these requirements.
SUMMARY OF THE INVENTION
A primary object of the invention is to provide implants with a composite coating to promote tissue in-growth and/or tissue on-growth. Another primary object of the invention is to provide a composition that can used as the composite coating. Another primary object of the invention is to provide implants having a composite coating that is located only on surface areas of the implant that are to be fixed with tissue in-growth and/or on-growth for stability. Another primary object of the invention is to provide methods of making the orthopedic implant.
In accordance with these objects, there is a particular need for an implant with a composite coating. Thus, it is rendered possible to simultaneously satisfy the above-discussed requirements of good substrate properties and good biocompatible coating properties, which, in the case of the prior art, are mutually contradicting and cannot be easily satisfied.
A first aspect of the invention is implemented in an embodiment that is based on an implant, comprising: a substrate; a structured surface defined by at least a portion of said substrate; and a biocompatible coating deposited on at least a fraction of said structured surface. A second aspect of the invention is implemented in an embodiment that is based on a composition for an implant, comprising: a biocompatible material coated on a structured surface defined by a substrate. A third aspect of the invention is implemented in an embodiment that is based on an implant, comprising: a substrate; a structured surface defined by a portion of said substrate; and a biocompatible coating deposited on at least a fraction of said structured surface, wherein said portion of said substrate is to be fixed with tissue in-growth and/or on-growth for stability. A fourth aspect of the invention is implemented in an embodiment that is based on a method of forming a composite coating, comprising: depositing a biocompatible coating on a structured surface defined by at least a portion of a surface area of a substrate.
These, and other, objects and aspects of the invention will be better appreciated and understood when considered in conjunction with the following description and the accompanying drawings. It should be understood, however, that the following description, while indicating preferred embodiments of the invention and numerous specific details thereof, is given by way of illustration and not of limitation. Many changes and modifications may be made within the scope of the invention without departing from the spirit thereof, and the invention includes all such modifications.
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Aharonov Robert R.
Andersen Knut
Despres, III Alfred S.
Ehlers Peter
Elwood Eugene J.
Hayes Medical, Inc.
Jackson Suzette J.
Pandiscio & Pandiscio
Willse David H.
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