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EP1101459A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Tapered bioabsorbable interference screw for endosteal fixation of ligaments

Assignee: Arthrex Inc
•
Filing: 2000-11-15
•
Granted: —
•
Expires: 2020-11-15
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Abstract

Abstract A bioabsorbable interference screw having a tapered profile which extends along substantially the entire length of the screw. The tapered profile makes the screw easy to insert while providing superior fixation resulting from an enlarged proximal end. Upon insertion, the screw engages cortical bone at the back end of the bone tunnel and fills all but 5-10 mm. of the tunnel, thereby providing increased fixation strength while also promoting fast healing. The screw includes a head provided with a specially designed drive socket with radially extending slots at its outer end for receiving corresponding protrusions on the shaft of screwdriver. The drive socket optimizes the torque capacity of the screw. To maintain wall thickness, the socket has a taper corresponding to the tapered outer profile of the screw. The taper of the socket also permits easy insertion of the tip and shaft of the driver into the screw.

Inventors

  • 👤 Eugene M. Wolf

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-23 05:06
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/08; A61F2/0811; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/86; A61B17/8625; A61B17/863; A61B17/88; A61B17/8875; A61B17/8605; A61B17/861; A61B17/864; A61B17/8645; A61B2017/00004; A61F2/0805; A61F2002/0817; A61F2002/0841; A61F2002/0847; A61F2002/0858; A61F2002/0876; A61F2002/0882; A61F2/30; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30062; A61F2210/00; A61F2210/0004; Y; Y10; Y10S; Y10S606/00; Y10S606/907; Y10S606/908

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 148 words
A bioabsorbable interference screw for ACL reconstruction, comprising: an elongated threaded body having a proximal end, a distal end, a length and a taper, the threads and the taper of the elongated threaded body extending along substantially the entire length of the elongated threaded body, the proximal end of the screw being configured to provide an interference fit of more than 1 mm. and up to 1.5 mm. in a bone tunnel, the length of the screw being configured to fill all but 5-10 mm. of the bone tunnel; a tip disposed at the distal end of the elongated body, the tip being non-threaded and having a taper which is greater than the taper of the elongated threaded body so as to be easily insertable in a bone tunnel; and a drive socket disposed within the screw and extending from the proximal end of the elongated threaded body.
Claim 2
Dependent Claim 31 words
The bioabsorbable interference screw of claim 1, wherein the drive socket includes a plurality of radially extending slots configured to receive corresponding radially extending protrusions on a shaft of a screwdriver.
Claim 3
Dependent Claim 23 words
The bioabsorbable interference screw of claim 1, wherein the drive socket has a taper corresponding to the taper of the elongated threaded body.
Claim 4
Dependent Claim 18 words
The bioabsorbable interference screw of claim 1, wherein the screw is fully cannulated for receiving a guide pin.
Claim 5
Dependent Claim 30 words
The bioabsorbable interference screw of claim 1, wherein the screw tapers from a diameter of 7.5 mm. at the tip to a diameter of 9 mm. at the drive socket.
Claim 6
Dependent Claim 30 words
The bioabsorbable interference screw of claim 1, wherein the screw tapers from a diameter of 8.5 mm. at the tip to a diameter of 10 mm. at the drive socket.
Claim 7
Dependent Claim 30 words
The bioabsorbable interference screw of claim 1, wherein the screw tapers from a diameter of 9.5 mm. at the tip to a diameter of 11 mm. at the drive socket.
Claim 8
Dependent Claim 30 words
The bioabsorbable interference screw of claim 1, wherein the screw tapers from a diameter of 9.5 mm. at the tip to a diameter of 12 mm. at the drive socket.

References Cited (Backward Citations)

US5211647A Cited
US5320626A Cited

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