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US6214031B1
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US
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Corkscrew suture anchor
Assignee: Arthrex Inc
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Filing: 2000-06-05
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Granted: 2001-04-10
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Expires: 2020-06-05
Abstract
Abstract A corkscrew suture anchor has a continuous thread spiralling around a tapering central core. At the distal end, the suture anchor terminates in a rounded point. At the proximal end of the suture anchor is an eye for receiving suture. The suture anchor has a large thread surface per turn of thread. Anti-backout ridges can be formed on the front and/or back faces of the threads. A driver for the suture anchor is provided, the driver including a shaft having a central axis, a length, a distal end, and a proximal end. The shaft is provided at its distal end with an opening aligned with the central axis of the shaft, for receiving the hexagonal proximal end of the suture anchor. One or more sutures threaded through the suture eye are threaded through the hollow tubular shaft. The suture is pulled into and captured by V-shaped notches on the proximal end of the handle to hold the suture anchor in place on the distal end of the driver under the tension of the captured sutures.
Inventors
- 👤 Reinhold Schmieding
- 👤 R. Donald Grafton
- 👤 Mark Brunsvold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:27
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/04; A61B17/0401; A61B2017/00004; A61B2017/0409; A61B2017/0414; A61B2017/044; Y; Y10; Y10S; Y10S606/00; Y10S606/916
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
164 words
A suture anchor for securing suture to soft bone, comprising: a central body having a central axis, a distal end and a proximal end, the central body having a diameter, the central body being tapered from a maximum diameter near the proximal end to a minimum diameter toward the distal end, and a tip portion disposed at the distal end of the central body having a taper which is greater than the taper of the central body; a drive head disposed on the proximal end of the central body; an eyelet for receiving at least one strand of suture; and a continuous thread disposed in a spiral around the central body and having an inner diameter, an outer diameter, and a thickness, the thickness of the thread at the outer edge of the thread increasing proximally along a portion of the thread, the outer diameter of the thread being at least twice the inner diameter of the thread along a portion of the thread.
Claim 2
Dependent Claim
164 words
A suture anchor for securing suture to soft bone, comprising: a central body having a central axis, a distal end and a proximal end, the central body having a diameter, the central body being tapered from a maximum diameter near the proximal end to a minimum diameter toward the distal end, and a tip portion disposed at the distal end of the central body having a taper which is greater than the taper of the central body; a drive head disposed on the proximal end of the central body; an eyelet for receiving at least one strand of suture; and a continuous thread disposed in a spiral around the central body and having an inner diameter, an outer diameter, and a thickness, the thickness of the thread at the outer edge of the thread increasing proximally along a portion of the thread, the outer diameter of the thread being at least twice the inner diameter of the thread along a portion of the thread.
Claim 3
Dependent Claim
43 words
A method of anchoring suture in bone using the suture anchor of claim 1 , the method comprising the steps of threading suture through the suture eye on the proximal end of the suture anchor, and driving the suture anchor into the bone.
Claim 4
Dependent Claim
13 words
The method of claim 1 , wherein the bone is in the shoulder.
Claim 5
Dependent Claim
15 words
The method of claim 3 , wherein the anchor is used for rotator cuff repair.
Claim 6
Dependent Claim
14 words
The method of claim 1 , wherein the bone is soft or cancellous bone.
Claim 7
Dependent Claim
13 words
The method of claim 1 , wherein the suture anchor is installed arthroscopically.
Claim 8
Dependent Claim
42 words
The suture anchor of claim 1 , wherein the thread has a distal and a proximal face, the proximal face forming a radial angle of about 5 to about 10 degrees from a perpendicular to a central axis of the suture anchor.
Claim 9
Dependent Claim
33 words
The suture anchor of claim 7 , wherein the distal face forms a radial angle of about 15 to about 20 degrees from the perpendicular to the central axis of the suture anchor.
Claim 10
Dependent Claim
19 words
The suture anchor of claim 7 , further comprising surface features provided on at least one of the faces.
Claim 11
Dependent Claim
31 words
The suture anchor of claim 7 , wherein the surface features are radial ridges for providing hold-in resistance and for biting into the surrounding tissue once the suture anchor is installed.
Claim 12
Dependent Claim
15 words
The suture anchor of claim 1 , wherein the tip portion tapers to a point.
Claim 13
Dependent Claim
12 words
The suture anchor of claim 11 , wherein the point is rounded.
Claim 14
Dependent Claim
19 words
The suture anchor of claim 11 , wherein the tip portion comprises a cone with a concave radiused surface.
Claim 15
Dependent Claim
34 words
The suture anchor of claim 1 , wherein the ratio of the outer diameter to the inner diameter of the thread is between about 2.25 and about 2.75 along a portion of the thread.
Claim 16
Dependent Claim
22 words
The suture anchor of claim 1 , wherein the thread has a pitch between about 6 and about 9 flights per inch.
Claim 17
Dependent Claim
42 words
The suture anchor of claim 1 , wherein the drive head and the central body are joined so as to form a step between a larger, outer dimension of the central body and an adjacent smaller, outer dimension of the drive head.
Claim 18
Dependent Claim
15 words
The suture anchor of claim 1 , wherein the thread has a rounded break edge.
Claim 19
Dependent Claim
20 words
The suture anchor of claim 1 , wherein the central body tapers from the proximal end to the distal end.
Claim 20
Dependent Claim
38 words
The suture anchor of claim 1 , wherein the drive head has an outer circumferential dimension, and the proximal end of the central body has an outer circumference greater than the outer circumferential dimension of the drive head.
Claim 21
Dependent Claim
15 words
The suture anchor of claim 1 further comprising channels for suture on the drive head.
Claim 22
Dependent Claim
18 words
The suture anchor of claim 1 , further comprising two lengths of suture attached to the suture anchor.
Claim 23
Dependent Claim
13 words
The suture anchor of claim 1 , wherein the drive head is hexagonal.
Claim 24
Dependent Claim
172 words
A suture anchor for securing suture to soft bone, comprising: a central body having a central axis, a distal end and aproximal end, the central body tapering in diameter along a major portion thereof from a maximum diameter near the proximal end to a minimum diameter toward the distal end; a drive head formed on the proximal end of the central body; an eyelet for receiving at least one strand of suture formed on the proximal end of the central body; a tip formed on the distal end of the central body which is provided with a concave, conically tapered surface; and a continuous thread disposed in a spiral around the central body, the thread having an outer edge having a thickness, the thickness of the outer edge of the thread increasing proximally; wherein the continuous thread extends at least along the major portion of the central body; and wherein the outer diameter of the thread is at least twice the inner diameter of the thread along a portion of the thread.
Claim 25
Dependent Claim
172 words
A suture anchor for securing suture to soft bone, comprising: a central body having a central axis, a distal end and aproximal end, the central body tapering in diameter along a major portion thereof from a maximum diameter near the proximal end to a minimum diameter toward the distal end; a drive head formed on the proximal end of the central body; an eyelet for receiving at least one strand of suture formed on the proximal end of the central body; a tip formed on the distal end of the central body which is provided with a concave, conically tapered surface; and a continuous thread disposed in a spiral around the central body, the thread having an outer edge having a thickness, the thickness of the outer edge of the thread increasing proximally; wherein the continuous thread extends at least along the major portion of the central body; and wherein the outer diameter of the thread is at least twice the inner diameter of the thread along a portion of the thread.
Claim 26
Dependent Claim
16 words
The suture anchor of claim 23 , further comprising channels for suture on the drive head.
Claim 27
Dependent Claim
18 words
The suture anchor of claim 23 , further comprising two lengths of suture attached to the suture anchor.
Claim 28
Dependent Claim
13 words
The suture anchor of claim 23 , wherein the drive head is hexagonal.
Claim 29
Dependent Claim
199 words
A suture anchor for securing suture to soft bone, comprising: a central body having a central axis, a distal end and a proximal end, the central body having a diameter along a major portion thereof tapering from a maximum diameter to a minimum diameter toward the distal end, and a tip portion approaching the distal end tapering from the minimum diameter to a point, the tip portion having a taper that is greater than the taper of the major portion of the central body; a drive head disposed on the proximal end of the central body, the drive head having an eyelet for suture; and a continuous thread disposed in a spiral around the central body, the thread having a proximal surface forming an angle with the central axis of the body, and a distal surface forming an angle with the central axis of the body, the angles of the proximal and distal surfaces of the thread being substantially constant along the thread, the thread having a thickness, the thickness of the thread increasing proximally; and wherein the outer diameter of the thread is at least twice the inner diameter of the thread along a portion of the thread.
Claim 30
Dependent Claim
199 words
A suture anchor for securing suture to soft bone, comprising: a central body having a central axis, a distal end and a proximal end, the central body having a diameter along a major portion thereof tapering from a maximum diameter to a minimum diameter toward the distal end, and a tip portion approaching the distal end tapering from the minimum diameter to a point, the tip portion having a taper that is greater than the taper of the major portion of the central body; a drive head disposed on the proximal end of the central body, the drive head having an eyelet for suture; and a continuous thread disposed in a spiral around the central body, the thread having a proximal surface forming an angle with the central axis of the body, and a distal surface forming an angle with the central axis of the body, the angles of the proximal and distal surfaces of the thread being substantially constant along the thread, the thread having a thickness, the thickness of the thread increasing proximally; and wherein the outer diameter of the thread is at least twice the inner diameter of the thread along a portion of the thread.
Claim 31
Dependent Claim
16 words
The suture anchor of claim 27 , further comprising channels for suture on the drive head.
Claim 32
Dependent Claim
18 words
The suture anchor of claim 27 , further comprising two lengths of suture attached to the suture anchor.
Claim 33
Dependent Claim
13 words
The suture anchor of claim 27 , wherein the drive head is hexagonal.
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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) | 2004-04-09 | 2004-10-09 | 2005-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-04-09 | 2008-10-09 | 2009-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-04-09 | 2012-10-09 | 2013-04-10 | $7700.00 | Window Closed / Lapsed |