US4917703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bone ingrowth chamber
Assignee: Nobel Biocare AB
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Filing: 1987-11-23
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Granted: 1990-04-17
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Expires: 2007-11-23
Abstract
Abstract An apparatus for studying tissue ingrowth in an implant under different experimental conditions, in particular in response to locally administered test substances is made of a bio-compatible material, preferably pure titanium, and is implanted in living bone tissue, primarily for animal experimental activities. The apparatus includes an outer portion with a central recess in which an inner portion is inserted. In the assembled state, the two portions form at least two bone ingrowth through channels which are exposed when the inner portion is dismounted, for comparative examination of the bone ingrowth promoting/retarding properties of test substances disposed in at least one of the channels.
Inventors
- 👤 Tomas Albrektsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:32
CPC Classifications
A; A61; A61B; A61B10/00; A61F; A61F2/00; A61F2/02; A61F2/28; A61F2/30; A61F2/46; A61F2/468; A61F2002/2817; A61F2002/30001; A61F2002/30108; A61F2002/30199; A61F2002/30224; A61F2002/30235; A61F2230/00; A61F2230/0063; A61F2230/0069; Y; Y10; Y10S; Y10S623/00; Y10S623/912; Y10S623/914
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
145 words
An apparatus of a bio-compatible material for implantation in a living bone tissue and for studying bone tissue formation growth in an implant under different experimental conditions, said apparatus comprising: an outer portion with a central recess extending therethrough and a removable inner portion insertable in said central recess; means provided in at least a bottom wall of said outer portion cooperating with a bottom wall of said inner portion to form a plurality of bone tissue ingrowth channels when said inner portion is fully inserted into said central recess, said channels being exposable for access thereto when said inner portion is removed upwardly; wherein at least one of said channels, a test channel, is provided with a test substance, thereby allowing comparative examination of said bone tissue ingrowth in said cannels to determine promoting/retarding properties of said test substance on said bone tissue ingrowth.
Claim 2
Independent Claim
145 words
An apparatus of a bio-compatible material for implantation in a living bone tissue and for studying bone tissue formation growth in an implant under different experimental conditions, said apparatus comprising: an outer portion with a central recess extending therethrough and a removable inner portion insertable in said central recess; means provided in at least a bottom wall of said outer portion cooperating with a bottom wall of said inner portion to form a plurality of bone tissue ingrowth channels when said inner portion is fully inserted into said central recess, said channels being exposable for access thereto when said inner portion is removed upwardly; wherein at least one of said channels, a test channel, is provided with a test substance, thereby allowing comparative examination of said bone tissue ingrowth in said cannels to determine promoting/retarding properties of said test substance on said bone tissue ingrowth.
Claim 3
Dependent Claim
33 words
The apparatus as claimed in claim 1, wherein said bone tissue ingrowth channels consist of two discrete through channels, one of the channels constituting said test channel, being provided with the test substance.
Claim 4
Dependent Claim
18 words
The apparatus as claimed in claim 2, wherein the test channel has been doped with the test substance.
Claim 5
Dependent Claim
40 words
The apparatus as claimed in claim 1, comprising three bone tissue ingrowth channels which form a Y-shaped pattern, whereby allowing comparison between properties of up to three different test substances disposed at the ends of each prong of the Y.
Claim 6
Dependent Claim
21 words
The apparatus as claimed in claim 4, wherein the ends of the prongs of the Y are closed by millipore filters.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-16 | 1993-10-16 | 1994-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-16 | 1997-10-16 | 1998-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-16 | 2001-10-16 | 2002-04-17 | $7700.00 | Window Closed / Lapsed |