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US7682393: Implant system, method, and instrument for augmentation or reconstruction of intervertebral disc

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Filing Information

Inventor(s) Hai H. Trieu · Lehmann K. Li ·
Assignee(s) Warsaw Orthopedic, Inc. ·
Primary Examiner Thomas C Barrett ·
Assistant Examiner Michael J Araj ·
Application Number US10965589
Filing date 10/14/2004
Issue date 03/23/2010
Prior Publication Data
Predicted expiration date 02/19/2027
Patent term adjustment 858
U.S. Classifications 623/171.1  ·
International Classifications A61F244  ·
Kind CodeB2
17 Claims, 7 Drawings


Abstract

An augmentation instrument for attaching a retaining device to a vertebral endplate comprises a drive housing having a distal end portion, a drive mechanism extending through the drive housing and including a flexible shaft portion, and an attachment mechanism at the distal end portion of the drive housing. The attachment mechanism is adapted for coupling to the retaining device.

Independent Claims | See all claims (17)

  1. 1. A system for maintaining a nucleus prosthesis within an annulus having a defect, the system comprising: a first blocking plate for preventing migration of the nucleus prosthesis through the defect in the annulus, the first blocking plate sized to be positioned substantially within an intervertebral disc space defined by a pair of adjacent vertebral endplates, the first blocking plate having a height less than a distance between the adjacent vertebral endplates but greater than half of the distance between the adjacent vertebral endplates such that the first blocking plate prevents migration of the nucleus prosthesis through the defect in the annulus without limiting the natural flexion and extension of the adjacent vertebral endplates, the first blocking plate comprising: a substantially planar retaining face, a substantially planar mounting face extending substantially perpendicular to the retaining face for engagement with a single one of the adjacent vertebral endplates, and an aperture extending through the first blocking plate and through a portion of the mounting face, wherein the first blocking plate comprises a rigid, non-resorbable biocompatible material; a fastener sized and shaped for extending through the aperture in the first blocking plate and into the single one of the adjacent vertebral endplates to securely attach the first blocking plate to the single one of the adjacent vertebral endplates; and an annular plug sized and shaped for positioning between the nucleus prosthesis and the first blocking plate at least partially within the defect in the annulus.

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