EP0560418A1
Expired / Lapsed
EP
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Implant having a metallic porous surface and method of making
Assignee: Bristol Myers Squibb Co
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Filing: 1993-02-22
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Granted: —
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Expires: 2013-02-22
Abstract
Abstract An implant comprises a plastic body (2) and a metallic, porous surface (3) securely fixed to the body. The implant is made by first producing a porous mold insert having a porous metal structure and a soluble filler material filling a portion of its pores. The mold insert is then placed in a mold and plastic is injected into the mold and the exposed pores of the insert to form the implant body and securely attach the body arid insert. The implant is then contacted by a solvent which dissolves the filler material to expose that portion of the insert which had been filled.
Inventors
- 👤 Thirumal Devanathan
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 09:54
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/68; B29C70/681; B29C70/683; A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61F2/30907; A61L; A61L27/00; A61L27/28; A61L27/30; A61L27/306; B29C45/00; B29C45/14; B29C45/14311; B29C45/14778; B29C45/14795; B29C70/74; B29C70/745; A61F2/3094; A61F2/32; A61F2/36; A61F2/3662; A61F2/3676; A61F2/30942; A61F2002/30957; A61F2002/30975; A61F2/3609; A61F2002/3625; B29C2045/14803; B29L; B29L2031/00; B29L2031/753; B29L2031/7532; Y; Y10; Y10S; Y10S623/00; Y10S623/901; Y10S623/92; Y10S623/923
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
55 words
An implant comprising: a body, the body having been formed in a processing environment; a porous insert attached to a surface of the body; and a filler material embedded in the porous material wherein the filler material is stable for a predetermined duration when exposed to the processing environment in which the body was formed.
Claim 2
Dependent Claim
28 words
The implant of claim 1 wherein the filler material is removable from the porous insert by means that will not adversely affect the mechanical properties of the body.
Claim 3
Dependent Claim
19 words
The implant of claim 2 wherein the filler material is more soluble in a solvent than is the body.
Claim 4
Dependent Claim
24 words
An implant comprising: a body including plastic; a porous material attached to the body; and a plastic filler material embedded in the porous material.
Claim 5
Dependent Claim
38 words
The implant of claim 4 wherein the body is molded from a material which is able to be injection molded and the filler is stable at a temperature and pressure at which the body material is injection moldable.
Claim 6
Dependent Claim
20 words
The implant of claim 4 wherein the body includes a semicrystalline polymer and the filler material includes an amorphous polymer.
Claim 7
Dependent Claim
21 words
The implant of claim 4 wherein the body includes a polymer selected from the group consisting of polyaryletherketone, polyetheretherketone, and polyphenylinesulfide.
Claim 8
Dependent Claim
23 words
The implant of claim 4 wherein the filler material includes a polymer selected from the group consisting of polysulfone, polyethersulfone, polycarbonate, and polymethylmethacrylate.
Claim 9
Dependent Claim
13 words
The implant of claim 4 wherein the porous material comprises a metal structure.
Claim 10
Dependent Claim
25 words
The implant of claim 9 wherein the metal structure includes a metal selected from the group consisting of titanium, titanium alloys, and cobalt chromium steel.
Claim 11
Dependent Claim
22 words
The implant of claim 9 wherein the metal structure includes an element selected from the group consisting of wire and sintered beads.
Claim 12
Independent Claim
47 words
A method for producing an implant having a body and a porous surface comprising the steps of: positioning a porous insert in a mold, the insert having a portion of its pores filled with a filler material and molding the body of the implant in the mold.
Claim 13
Dependent Claim
25 words
The method of claim 12 further comprising the step of removing the filler material from the insert after the body of the implant is molded.
Claim 14
Dependent Claim
25 words
The method of claim 13 wherein the filler material is removed in a manner selected from the group consisting of melting, dissolving, and mechanically dislodging.
Claim 15
Independent Claim
56 words
A method for producing an implant having a body and a porous surface, comprising the steps of: forming a porous insert by introducing an amorphous polymer into some of the pores of a porous material; positioning the porous insert in a mold; injecting a semi-crystalline polymer into the mold; dissolving the amorphous polymer in a solvent.
Claim 16
Dependent Claim
21 words
The method of claim 15 wherein the amorphous polymer is selected from the group consisting of polysulfone, polyethersulfone, polycarbonate, and polymethylmethacrylate.
Claim 17
Dependent Claim
20 words
The method of claim 15 wherein the semi-crystalline polymer is selected from the group consisting of polyetheretherketone, polyaryletherketone, and polyphenylinesulfide.
Claim 18
Dependent Claim
22 words
the method of claim 15 wherein the solvent is selected from the group consisting of methylene chloride, methyl ethyl ketone, and acetone.
Claim 19
Dependent Claim
21 words
The method of claim 15 wherein the porous material is heated while the filler material is pressed into the porous material.
References Cited (Backward Citations)
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