US6296641B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anatomical fixation implant
Assignee: Bionx Implants Oy
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Filing: 1998-04-03
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Granted: 2001-10-02
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Expires: 2018-04-03
Abstract
Abstract A fixation implant generally includes at least one shaft configured to securely fit into a hole formed in bone. The shaft is of sufficient length relative to the interior diameter of the hole and, in some preferred embodiments, has locking protuberances, like threads, ridges, or barbs, that resist removal of the shaft from the hole in the bone when different types of forces, such as tensile or bending forces, are applied to the implant. The shaft is generally cylindrical in shape, however, in various embodiments, different cross-sections could be used. In a preferred embodiment the implant has a flattened and bent end portion emerging from only one side of the shaft. At the other side of the implant the outer surface of the shaft and the emerging end portion form a smooth surface, without any projections. This smooth surface at the end of the implant prevents irritation of the surrounding tissue. The end portion has a mating surface configured to grip a portion of the soft tissue surrounding the hole between the bone and the mating surface. The longitudinal axis of the shaft is oriented at an angle of less than 90 degrees relative to the mating surface. In this fashion, the implant anchors soft tissue, such as rotator cuff tissue, to bone.
Inventors
- 👤 W. Burkhead
- 👤 Pertti Törmälä
- 👤 Harri Happonen
- 👤 Pertti Helevirta
- 👤 Auvo Kaikkonen
- 👤 Timo Pohjonen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:18
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/08; A61F2/0811; A61F2002/0847; A61F2002/0858; A61F2002/0876; A61F2002/0888
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
110 words
A substantially bioabsorbable, one-piece implant for tissue fixation comprising: an elongated-cannulated shaft having a longitudinal axis and a first end, said first end having first and second sides, said first end comprising a mating surface projecting only from said first side of said elongated-cannulated shaft so that said second side of said first end of said elongate-cannulated shaft has a smooth surface without projection, said mating surface being oriented at an angle of less than 90 degrees with respect to said longitudinal axis of said shaft, and said mating surface having a width in a direction perpendicular to the longitudinal axis that is greater than the width of said shaft.
Claim 2
Dependent Claim
110 words
A substantially bioabsorbable, one-piece implant for tissue fixation comprising: an elongated-cannulated shaft having a longitudinal axis and a first end, said first end having first and second sides, said first end comprising a mating surface projecting only from said first side of said elongated-cannulated shaft so that said second side of said first end of said elongate-cannulated shaft has a smooth surface without projection, said mating surface being oriented at an angle of less than 90 degrees with respect to said longitudinal axis of said shaft, and said mating surface having a width in a direction perpendicular to the longitudinal axis that is greater than the width of said shaft.
Claim 3
Dependent Claim
18 words
The implant of claim 1 wherein the outer surface of said elongated-cannulated shaft contains one or more protuberances.
Claim 4
Dependent Claim
10 words
The implant of claim 2 wherein the protuberances are barbs.
Claim 5
Dependent Claim
10 words
The implant of claim 2 wherein the protuberances are ridges.
Claim 6
Dependent Claim
11 words
The implant of claim 2 wherein the protuberances are screw threads.
Claim 7
Dependent Claim
14 words
The implant of claim 1 wherein the mating surface contains one or more protuberances.
Claim 8
Dependent Claim
14 words
The implant of claim 6 wherein the protuberances on the mating surface are spikes.
Claim 9
Dependent Claim
12 words
The implant of claim 1 wherein said implant comprises an oriented polymer.
Claim 10
Dependent Claim
14 words
The implant of claim 1 wherein said implant comprises a polymer containing reinforcement elements.
Claim 11
Dependent Claim
12 words
The implant of claim 1 wherein said implant comprises a self-reinforced polymer.
Claim 12
Dependent Claim
20 words
The implant of claim 1 wherein the implant has a pull-out strength in cancellous bone of at least 130 N.
Claim 13
Dependent Claim
12 words
The implant of claim 1 wherein said mating surface is substantially flat.
Claim 14
Dependent Claim
22 words
The implant of claim 1 wherein said implant is an implant for affixing soft material within the rotator cuff of a mammal.
Claim 15
Dependent Claim
98 words
A substantially bioabsorbable, one-piece implant for tissue fixation comprising: an elongated- cannulated shaft having a longitudinal axis and a first end, said first end having first and second sides, said first end comprising a mating surface projecting only from said first side, said mating surface being oriented at an angle of less than 90 degrees with respect to said longitudinal axis of said shaft, said implant comprising a polymer containing reinforcement elements, said reinforcement elements being located at least in the portion of the implant projecting from the outer surface of said shaft to form said mating surface.
Claim 16
Dependent Claim
98 words
A substantially bioabsorbable, one-piece implant for tissue fixation comprising: an elongated- cannulated shaft having a longitudinal axis and a first end, said first end having first and second sides, said first end comprising a mating surface projecting only from said first side, said mating surface being oriented at an angle of less than 90 degrees with respect to said longitudinal axis of said shaft, said implant comprising a polymer containing reinforcement elements, said reinforcement elements being located at least in the portion of the implant projecting from the outer surface of said shaft to form said mating surface.
Claim 17
Dependent Claim
14 words
The implant of claim 14 wherein said mating surface contains one or more protuberances.
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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) | 2004-10-01 | 2005-04-02 | 2005-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-10-01 | 2009-04-02 | 2009-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-10-01 | 2013-04-02 | 2013-10-02 | $7700.00 | Window Closed / Lapsed |