US5895425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bone implant
Assignee: Arthrex Inc
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Filing: 1998-02-06
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Granted: 1999-04-20
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Expires: 2018-02-06
Abstract
Abstract A surgical implant for securing ligament grafts into a joint. The implant has back-biting threads that allow the implant to be advanced into bone by impaction. If necessary, the implant can be removed from the bone by rotation. The implant is used, for example, for knee ligament repair by forming a longitudinal socket in a bone. The socket is intersected by a transverse pin. A flexible strand is drawn with the pin through the bone. A looped portion of the flexible strand is diverted so as to protrude out of the entrance to the longitudinal socket. The ends of the flexible strand remain accessible on either side of the bone. The ligament graft is captured within the strand loop protruding from the entrance to the socket. The strand is retracted into the socket, drawing the graft into the socket by pulling on the accessible ends of the flexible strand. The graft is fixed in the socket using the transverse implant.
Inventors
- 👤 R. Donald Grafton
- 👤 Eugene M. Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:10
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/064; A61B17/0642; A61B17/16; A61B17/17; A61B17/1714; A61B17/1739; A61B17/1764; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/86; A61B17/8625; A61F; A61F2/00; A61F2/02; A61F2/08; A61F2/0805; A61F2/0811; A61B17/076; A61B17/863; A61B17/864; A61B2017/00004; A61B2017/0647; A61B2017/0648; A61F2/30; A61F2/38; A61F2002/0817; A61F2002/0841; A61F2002/0847; A61F2002/0852; A61F2002/0876; A61F2002/0882; Y; Y10; Y10S; Y10S606/00; Y10S606/907; Y10S606/908; Y10S606/916
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
164 words
A bone implant formed of a biologically compatible material, comprising: a shaft having a distal end, a proximal end, and a central axis, said bone implant having a cannulation disposed along the central axis of the shaft and extending completely through the implant from the distal end to the proximal end, such that said implant is adapted to be advanced over a guide wire into the body of a patient; and a back-biting helical thread formed on the proximal end of the shaft, the thread having a distal face and a proximal face, the distal face of the thread forming an angle of about 72° with respect to a perpendicular to the central axis of the implant, and the proximal face of the thread forming an angle of about 18° with respect to a perpendicular to the central axis of the implant, such that the implant can be driven by impaction into a pre-drilled bone site, and removed from the bone site by rotation.
Claim 2
Dependent Claim
164 words
A bone implant formed of a biologically compatible material, comprising: a shaft having a distal end, a proximal end, and a central axis, said bone implant having a cannulation disposed along the central axis of the shaft and extending completely through the implant from the distal end to the proximal end, such that said implant is adapted to be advanced over a guide wire into the body of a patient; and a back-biting helical thread formed on the proximal end of the shaft, the thread having a distal face and a proximal face, the distal face of the thread forming an angle of about 72° with respect to a perpendicular to the central axis of the implant, and the proximal face of the thread forming an angle of about 18° with respect to a perpendicular to the central axis of the implant, such that the implant can be driven by impaction into a pre-drilled bone site, and removed from the bone site by rotation.
Claim 3
Dependent Claim
14 words
The implant of claim 1, wherein the distal portion of the shaft is tapered.
Claim 4
Dependent Claim
13 words
The implant of claim 1, wherein the shaft has a smooth central portion.
Claim 5
Dependent Claim
13 words
The implant of claim 1, further comprising an attachment point for a driver.
Claim 6
Dependent Claim
13 words
The implant of claim 1, wherein the thread is a continuous, unbroken helix.
Claim 7
Dependent Claim
10 words
The implant of claim 1, wherein the thread is rigid.
Claim 8
Dependent Claim
19 words
The implant of claim 1, wherein the thread and the implant are machined from a single piece of material.
Claim 9
Dependent Claim
15 words
The implant of claim 1, wherein the implant is made of a biologically resorbable material.
References Cited (Backward Citations)
DE2644215A1
Cited
US5139499A
Cited
US4985032A
Cited
US5098435A
Cited
US5266075A
Cited
US5393302A
Cited
US5354300A
Cited
US5350380A
Cited
US5397356A
Cited
US5562671A
Cited
US5431651A
Cited
US5423823A
Cited
US5601562A
Cited
US5571139A
Cited
US5743912A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-04-19 | 2002-10-19 | 2003-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-04-19 | 2006-10-19 | 2007-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-04-19 | 2010-10-19 | 2011-04-20 | $7700.00 | Window Closed / Lapsed |