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US6610094: Intervertebral prosthesis

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Filing Information

Inventor(s) Jean-Louis Husson ·
Assignee(s) Sulzer Orthopaedie AG ·
Attorney/Agent(s) Townsend and Townsend and Crew LLP ·
Primary Examiner Corrine McDermott ·
Assistant Examiner Thomas C. Barrett ·
Application Number US9499274
Filing date 02/07/2000
Issue date 08/26/2003
Prior Publication Data
Predicted expiration date 09/30/2016
U.S. Classifications 623/171.6  · 623/171.1  ·
International Classifications --
Kind CodeB2
International Classifications 623 1716 · 623 1712 · 623 17 · 623 1111 · 623 1318 · 606200 ·
Related U.S. Application DataCROSS-REFERENCES TO RELATED APPLICATIONS
This application is a continuation-in-part application and claims priority from U.S. patent application Ser. No. 09/249,945 filed Feb. 12, 1999 now abandoned; and U.S. patent application Ser. No. 09/249,934 filed Feb. 12, 1999, now U.S. Pat. No. 6,165,218 both of which are divisional applications and claim priority from U.S. patent application Ser. No. 08/723,146, filed Sep. 30, 1996 now U.S. Pat. No. 5,919,235; the disclosures of which are incorporated herein by reference.
Foreign Priority EP95810701 - 11/08/1995 ·
5 Claims, 6 Drawings


Abstract

The invention deals with an implant, in particular, an intervertebral prosthesis, which consists of an elongated elastic body which is form-elastic and takes on the form of a spiral S in the force-free state. The spiral can be drawn by a reverse winding up into an insertion instrument which is only unsubstantially larger in the insertion region than the cross-section of the elongated elastic body in order to reach the inner space of an intervertebral disc through a small opening in the annulus fibrosus and to push in and sever off the self-winding spiral when the interior is filled. This has the advantage that inner spaces of differing sizes can be filled with the same spiral.

Independent Claims | See all claims (5)

  1. 1. An implant comprising an elongated, elastic body which is form-elastic and which takes on a form of a spiral in a force-free state, and comprising hydrogel members that are held in grooves at a bottom or at a side of the body and which follow the spiral, whereby hydrogel members that are affixed to the body in a dehydrated state have the possibility to enlarge their volume after implantation.
  2. 2. An intervertebral prosthesis for replacement of a nucleus of an intervertebral disk, the prosthesis having an elongated elastic body, which is form-elastic and which rolls up by itself into a form of a plane, circular and form-fitted spiral in a force-free state; said body comprising a hydrogel apparatus for enlarging a height H of the spiral after implantation wherein the hydrogel apparatus comprises hydrogel members held in grooves at a bottom or at a side of the body and which follow the spiral.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US3867728* CUTTER LAB Stubstad et al. Feb 1975
US5716416* Lin Feb 1998
US5976186* Stryker Technologies Corporation Bao et al. Nov 1999
* cited by examiner

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