Patent EP0556571A1 successfully refreshed from Google Patents.
EP0556571A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Apparatus for endosteal fixation of a substitute ligament by screw insertion
Assignee: Arthrex Medizinische Instrumente GmbH
•
Filing: 1993-01-18
•
Granted: —
•
Expires: 2013-01-18
Abstract
Abstract An interference screw 16 and a cannulated sheath 1 for fixating ligaments. A graft, attached between previously cut bone blocks, is placed under tension in a graft tunnel 8. The sheath 1 has a cutout 17 at one end such that during screw insertion, the graft is covered by the sheath 1 and protected from the threads of the screw 16, while the bone to which the graft is being fixed is exposed to the threads of the screw 16. The screw 16 is driven between the bone to which the graft is being fixed and a corresponding one of the bone blocks. The screw 16 may be cannulated for insertion over a pre-positioned guide pin.
Inventors
- 👤 Reinhold Schmieding
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 17:05
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; A61B17/8645; A61B17/88; A61B17/8875; A61B17/8605; A61B17/861; A61F2/0805; A61F2002/0847; A61F2002/0858; A61F2002/087; A61F2002/0876; A61F2002/0882; Y; Y10; Y10S; Y10S606/00; Y10S606/907; Y10S606/908; Y10S606/91; Y10S606/916
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
70 words
An apparatus for endosteal fixation of a substitute ligament by screw insertion, comprising: an interference screw (16); and a cylindrical cannulated sheath (1) which is configured to receive said interference screw (16) and has first and second ends, said second end including a cutout (17) for exposing a portion of said interference screw (16) during screw insertion for preventing said interference screw (16) from damaging the graft during screw insertion.
Claim 2
Dependent Claim
22 words
Apparatus according to claim 1, characterized in that said first end is configured to receive said interference screw (16) during screw insertion.
Claim 3
Dependent Claim
28 words
Apparatus according to claim 1 or 2, characterized in that said cutout (17) extends over less than one-half, in particular one-third, of the circumference of said sheath (1).
Claim 4
Dependent Claim
41 words
Apparatus according to any of the preceeding claims, characterized in that the outer surface of said sheath (1) has a continuous threadlike ridge (5) to facilitate insertion and removal of said sheath (1) into and out of position for screw insertion.
Claim 5
Dependent Claim
31 words
Apparatus according to any of the preceeding claims, characterized in that said cannulated sheath (1) is made of a plastic material and/or that the interference screw (16) is made of titanium.
Claim 6
Dependent Claim
29 words
Apparatus according to any of the preceeding claims, characterized in that said interference screw (16) is tapered at one end thereof and has rounded edges at the other end.
Claim 7
Dependent Claim
34 words
Apparatus according to any of the preceeding claims, characterized in that said interference screw (16) has an inverse hex-head for receiving a hex-head screwdriver at one end thereof, said end having preferably rounded edges.
Claim 8
Dependent Claim
24 words
Apparatus according to any of the preceeding claims, characterized in that said interference screw(16) has a cannula (13) for receiving a guide pin (20).
Claim 9
Dependent Claim
11 words
Interference screw as described in any of claims 1 to 8.
Claim 10
Dependent Claim
12 words
Cylindrical cannulated sheath as described in any of claims 1 to 5.
References Cited (Backward Citations)
US4877020A
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.