Source: http://www.google.com/patents/US7442208?dq=7143430
Timestamp: 2014-09-01 21:36:48
Document Index: 630491574

Matched Legal Cases: ['art 6', 'art 6', 'art 6', 'art 6', 'art 6', 'art 2', 'art 6', 'art 6', 'art 6', 'art 6', 'art 6', 'art 6']

Patent US7442208 - Interspinal prosthesis - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsA prosthesis for use in maintaining an interspinal space is disclosed. The prosthesis may be provided as first and second substantially symmetrical halves. The first and second halves may each have a coupling portion and a process portion. The coupling portions allow the separate halves to be separately...http://www.google.com/patents/US7442208?utm_source=gb-gplus-sharePatent US7442208 - Interspinal prosthesisAdvanced Patent SearchPublication numberUS7442208 B2Publication typeGrantApplication numberUS 10/784,046Publication dateOct 28, 2008Filing dateFeb 20, 2004Priority dateAug 20, 2001Fee statusPaidAlso published asCA2495119A1, CA2495119C, CN1271974C, CN1545398A, EP1418852A1, US20040199255, WO2003015645A1Publication number10784046, 784046, US 7442208 B2, US 7442208B2, US-B2-7442208, US7442208 B2, US7442208B2InventorsClaude Mathieu, Beat Lechmann, Paul PavlovOriginal AssigneeSynthes (U.S.A.)Export CitationBiBTeX, EndNote, RefManPatent Citations (14), Referenced by (47), Classifications (7), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetInterspinal prosthesisUS 7442208 B2Abstract A prosthesis for use in maintaining an interspinal space is disclosed. The prosthesis may be provided as first and second substantially symmetrical halves. The first and second halves may each have a coupling portion and a process portion. The coupling portions allow the separate halves to be separately fit within the interspinal space and then connected to form a single prosthesis, eliminating the need for cutting connecting ligaments to allow insertion of the prosthesis. Various connection and locking arrangements are disclosed to maintain the halves engaged with each other and the interspinal space.
CROSS-REFERENCE TO EARLIER-FILED APPLICATION This application is a continuation of co-pending PCT application serial number PCT/CH01/00509, filed Aug. 20, 2001, the entirety of which application is incorporated herein by reference thereto.
BACKGROUND OF THE INVENTION The invention relates to an interspinal prosthesis with a central part having a central axis, which can be introduced into the interspinal space, an inner end and an outer end, as well as two processes, which arise at the outer end, the two processes extending radially and diametrically with respect to the central axis and which can be introduced into the space between the spinal processes of two adjacent vertebrae, a counterpart thereto as well as to a multi-part interspinal prosthesis combined therefrom.
SUMMARY OF THE INVENTION The invention is to provide a remedy here. It is therefore an object of the invention to provide an interspinal prosthesis, which can be implanted while the supraspinal ligament is retained, so that the operation, as a whole, can be carried out more gently and the implant secured dorsally without additional means.
a) have an area of 50 to 300 mm2 and preferably of 70 to two 250 mm2 through the central piece at its narrowest site in the area of the inner end and b) an area of 70 to 500 mm2 and preferably of 100 to 450 mm2 through the processes. Furthermore, the prosthesis is produced preferably from an elastic material, so that the central piece can be elastically deformed radially. Preferably the central portion of the prosthesis is capable of deforming from about 10% to about 50%, more preferably from about 15% to about 50% relative to its unstressed diameter. A sufficient radial, elastic deformability can be achieved by producing the prosthesis from a plastic or by producing the central piece with cogs, which can be deformed radially and elastically.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 a shows a section through the preferred embodiment of the inventive, interspinal prosthesis with counterpart,
FIG. 1 b shows a side view of the preferred embodiment of the embodiment of the inventive prosthesis with counterpart, shown in FIG. 1 a, FIG. 2 shows a section through a different embodiment of the inventive interspinal prosthesis with a counterpart,
DETAILED DESCRIPTION OF THE INVENTION In FIG. 1, the interspinal prosthesis 1 with the counterpart 6 is shown in the assembled state. The central piece 2 of the prosthesis 1, with the inner end 7 of the prosthesis 1, adjoins the counterpart 6. At the outer end 8 of the prosthesis 1, the two processes 3 are disposed perpendicularly to the central axis 4 and diametrically opposite to one another. In the embodiment shown here, the processes 3 are constructed as halves of an ellipsoid body. The also radial and diametrically opposite to one another processes 3 of the counterpart 6 are disposed symmetrically to a plane, which is orthogonal to the central axis 4. Three radial cams 17, which are disposed symmetrically when viewed in the cross-section of the prosthesis 1 parallel to the central axis 4, protrude at the central piece 2 at the inner end 7 of the prosthesis and engage complementary grooves 18 at the counterpart 6, function as twisting safeguard between the prosthesis 1 and the counterpart 6. Coaxially with the central axis 4, the central part 2 includes a depression 5, which penetrates from the inner end 7 into the prosthesis 1 up to a depth T. The counterpart 6 has a peg 16, which is constructed to be complementary to the depression 5 and accordingly, during the assembly of the prosthesis 1 and the counterpart 6, can be introduced into the depression 5. Furthermore, the prosthesis 1 comprises a fixing-in-position bolt 19 with a bolt head 26, which can be brought into contact with the outer end 8 of the prosthesis 1. The fixing-in-position bolt can be passed coaxially with the central axis 4 through the prosthesis 1 and locked by means of a slide lock 27 in the peg 16 of the counterpart 6, so that the prosthesis 1 can be locked detachably with the counterpart 6. A borehole 20, coaxial with the central axis 4, passes through the fixing-in-position bolt 19 and the counterpart 6, so that the prosthesis 1 and the counterpart 6 can be collapsed radially.
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A61B17/70, A61B17/56Cooperative ClassificationA61B17/7068European ClassificationA61B17/70P8Legal EventsDateCodeEventDescriptionApr 11, 2012FPAYFee paymentYear of fee payment: 4Jun 12, 2009ASAssignmentOwner name: SYNTHES USA, LLC, PENNSYLVANIAFree format text: CHANGE OF NAME;ASSIGNOR:SYNTHES (U.S.A.);REEL/FRAME:022826/0140Effective date: 20081223Owner name: SYNTHES USA, LLC,PENNSYLVANIAFree format text: CHANGE OF NAME;ASSIGNOR:SYNTHES (U.S.A.);US-ASSIGNMENT DATABASE UPDATED:20100211;REEL/FRAME:22826/140Free format text: CHANGE OF NAME;ASSIGNOR:SYNTHES (U.S.A.);US-ASSIGNMENT DATABASE UPDATED:20100223;REEL/FRAME:22826/140Free format text: CHANGE OF NAME;ASSIGNOR:SYNTHES (U.S.A.);US-ASSIGNMENT DATABASE UPDATED:20100309;REEL/FRAME:22826/140Free format text: CHANGE OF NAME;ASSIGNOR:SYNTHES (U.S.A.);US-ASSIGNMENT DATABASE UPDATED:20100329;REEL/FRAME:22826/140Free format text: CHANGE OF NAME;ASSIGNOR:SYNTHES (U.S.A.);US-ASSIGNMENT DATABASE UPDATED:20100330;REEL/FRAME:22826/140Free format text: 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