US6083264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Implant material for replacing or augmenting living bone tissue involving thermoplastic syntactic foam
Assignee: McDonnell Douglas Corp
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Filing: 1998-06-30
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Granted: 2000-07-04
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Expires: 2018-06-30
Abstract
Abstract An implant device material is provided for replacement or augmentation of living bone tissue involving a thermoplastic syntactic foam material formed from microballoons, a polymer such as polyetherimide which wets and binds the microballons into an array, and interstitial space is present between the microballoons bound into the array to create porosity. A fiber material can be embedded within the array. The thermoplastic syntactic foam material is highly biocompatible and stable with no apparent adverse effects on a recipient. The implant device material also effectively conducts bone into the porous implant via its controlled interstitial porosity. The implant material also can be readily molded or machined into complex structural shapes, density and porosity, such that it can be closely tailored to mimic the natural bone tissue to be replaced.
Inventors
- 👤 David W. Wood
- 👤 James L. Melquist
- 👤 Walter A. Phillips
- 👤 Donald J. Bridges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:00
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/50; A61L27/56; A61L27/40; A61L27/44; A61L27/446; A61L2430/00; A61L2430/02; B; B33; B33Y; B33Y80/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
86 words
An implant material for replacing or augmenting living bone tissue, comprising: about 85 to 3 parts by volume microballoons per 100 parts by volume of the implant material; about 3 to 85 parts by volume polymer per 100 parts by volume of the implant material, wherein the polymer is wetted to the microballoons and binds the microballoons together in an array; and about 3 to 70 parts by volume interstitial space between the microballoons in the array per 100 parts by volume of the implant material.
Claim 2
Dependent Claim
86 words
An implant material for replacing or augmenting living bone tissue, comprising: about 85 to 3 parts by volume microballoons per 100 parts by volume of the implant material; about 3 to 85 parts by volume polymer per 100 parts by volume of the implant material, wherein the polymer is wetted to the microballoons and binds the microballoons together in an array; and about 3 to 70 parts by volume interstitial space between the microballoons in the array per 100 parts by volume of the implant material.
Claim 3
Dependent Claim
50 words
The implant material as claimed in claim 1, wherein the microballons comprise from about 25 to 70 parts by volume per 100 parts by volume of the implant material, and the polymer comprises from about 15 to 30 parts by volume per 100 parts by volume of the implant material.
Claim 4
Dependent Claim
17 words
The implant material as claimed in claim 1, wherein the interstitial space between the microballoons contains air.
Claim 5
Dependent Claim
14 words
The implant material as claimed in claim 1, wherein the microballons comprise silica microballoons.
Claim 6
Dependent Claim
30 words
The implant material as claimed in claim 1, wherein the microballoons comprise at least 90% thereof silica microballoons having a diameter ranging from about 5 μm to about 150 μm.
Claim 7
Dependent Claim
17 words
The implant material as claimed in claim 1, further including a fiber material embedded within the array.
Claim 8
Dependent Claim
15 words
The implant material as claimed in claim 1, wherein the polymer comprises a polycondensate polymer.
Claim 9
Dependent Claim
65 words
An implant material for replacing or augmenting living bone tissue, comprising: microballoons; polyetherimide polymer, wherein the polyetherimide polymer is wetted to the microballoons and binds the microballoons together in an array; and interstitial space between the microballoons in the arrays, wherein the interstitial space between the microballoons comprises from about 3 to 70 parts by volume per 100 parts by volume of the implant material.
Claim 10
Dependent Claim
65 words
An implant material for replacing or augmenting living bone tissue, comprising: microballoons; polyetherimide polymer, wherein the polyetherimide polymer is wetted to the microballoons and binds the microballoons together in an array; and interstitial space between the microballoons in the arrays, wherein the interstitial space between the microballoons comprises from about 3 to 70 parts by volume per 100 parts by volume of the implant material.
Claim 11
Dependent Claim
20 words
The implant material as claimed in claim 8, wherein the polyetherimide polymer is the polymerization product of an oligomeric precursor.
Claim 12
Dependent Claim
48 words
The implant material as claimed in claim 8, wherein the polyetherimide polymer is the polymerization product of an oligomeric precursor having an initial viscosity at the processing temperature of from about 330° C. to about 350° C. sufficient to flow and to set said microballoons prior to polymerization.
Claim 13
Dependent Claim
14 words
The implant material as claimed in claim 8, wherein the microballoons comprise silica microballoons.
Claim 14
Dependent Claim
30 words
The implant material as claimed in claim 8, wherein the microballoons comprise at least 90% thereof silica microballoons having a diameter ranging from about 5 μm to about 150 μm.
Claim 15
Dependent Claim
75 words
The implant material as claimed in claim 8, wherein the microballoons comprise from about 85 to 3 parts by volume per 100 parts by volume of the implant material, the polyetherimide polymer comprises from about 3 to 85 parts by volume per 100 parts by volume of the implant material, and the interstitial space between the microballoons comprises from about 3 to 70 parts by volume per 100 parts by volume of the implant material.
Claim 16
Dependent Claim
17 words
The implant material as claimed in claim 8, wherein the interstitial space between the microballoons contains air.
Claim 17
Dependent Claim
17 words
The implant material as claimed in claim 8, further including a fiber material embedded within the array.
Claim 18
Dependent Claim
66 words
An implant material for replacing or augmenting living bone tissue, comprising: microballoons; a polymer which is wetted to the microballoons and binds the microballoons together in an array; interstitial space between the microballoons in the array; and a fiber material embedded within the array, wherein the fiber material comprises from about 0.1 to 20 parts by volume per 100 parts by volume of the implant material.
Claim 19
Dependent Claim
66 words
An implant material for replacing or augmenting living bone tissue, comprising: microballoons; a polymer which is wetted to the microballoons and binds the microballoons together in an array; interstitial space between the microballoons in the array; and a fiber material embedded within the array, wherein the fiber material comprises from about 0.1 to 20 parts by volume per 100 parts by volume of the implant material.
Claim 20
Dependent Claim
21 words
The implant material as claimed in claim 16, wherein said first component comprises silica microballoons and the polymer comprises polyetherimide polymer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-07-04 | 2004-01-03 | 2004-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-07-04 | 2008-01-03 | 2008-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-07-04 | 2012-01-03 | 2012-07-04 | $7700.00 | Window Closed / Lapsed |