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US8029568: Intervertebral spacer device having a slotted partial circular domed arch strip spring

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Filing Information

Inventor(s) James D. Ralph · Stephen Tatar · Joseph P. Errico ·
Assignee(s) SpineCore, Inc. ·
Attorney/Agent(s) Lerner, David, Littenberg, Krumholz & Mentlik, LLP ·
Primary Examiner David H Willse ·
Assistant Examiner Javier Blanco ·
Application Number US12829724
Filing date 07/02/2010
Issue date 10/04/2011
Prior Publication Data
Predicted expiration date 10/18/2021
U.S. Classifications 623/171.3  · 623/171.5  · 623/171.4  ·
International Classifications A61F244  ·
Kind CodeB2
Related U.S. Application DataCROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation U.S. application Ser. No. 10/648,464 filed Aug. 25, 2003, now abandoned, which is a continuation of U.S. application Ser. No. 10/035,669 filed Nov. 9, 2001, now U.S. Pat. No. 6,610,092, which is a continuation-in-part of U.S. application Ser. No. 09/982,148 filed Oct. 18, 2001, now U.S. Pat. No. 6,673,113, the disclosures of which are incorporated herein by reference.
9 Claims, 5 Drawings


Abstract

An intervertebral spacer device having a pair of opposing plates for seating against opposing vertebral bone surfaces. Each of the opposing plates has an external surface with a deflectable wire mesh thereon, into which the bone can readily grow.

Independent Claims | See all claims (9)

  1. 1. An intervertebral spacer device comprising: a first plate having an inner surface and an exterior surface, the inner surface of the first plate including a post member extending substantially perpendicular therefrom, the post member including a ball-shaped head having a outer curved convex surface, the post member having a central threaded axial bore; a second plate having an inner surface and an exterior surface, the inner surface of the first and second plates facing one another; a wire mesh secured over one of the exterior surfaces of the first and second plates, wherein the mesh has a perimeter that is anchored to the exterior surface and a center, wherein only the center of the mesh is deflectable relative to the exterior surface of the one of the first and second plates; and a slotted domed arch strip spring having a top side with a partially circular convex surface, an underside with a partially circular concave surface, and a plurality of slots extending through the top side and underside of the spring, the spring further having a central opening including a concave volume, the spring having first and second lateral ends each having an aperture therethrough, the apertures adapted to receive a fastening member for fixing the lateral ends of the spring to the inner surface of the second plate, wherein the ball-shaped head of the post member is received within the central opening of the spring and is locked within the concave volume thereof when a fastening member is received and held within the central threaded axial bore of the post member.
  2. 5. An intervertebral spacer device comprising: a first plate having an inner surface and an exterior surface, the inner surface of the first plate including a post member extending substantially perpendicular therefrom, the post member including a ball-shaped head having an outer curved convex surface, the post member having a central threaded axial bore; a second plate having an inner surface and an exterior surface, the inner surface of the first and second plates facing one another; a wire mesh secured over one of the exterior surfaces of the first and second plates, wherein the mesh has a perimeter that is anchored to the exterior surface and a center, wherein only the center of the mesh is deflectable relative to the exterior surface of the one of the first and second plates; and a slotted domed arch strip spring having a top side with a partially circular convex surface facing toward the inner surface of the first plate, an underside with a partially circular concave surface facing toward the inner surface of the second plate, the spring further having a central opening including a concave volume; and a joint coupling the first and second plates together, the joint including the ball-shaped head of the post, the central opening of the spring, and a fastening member, wherein the ball-shaped head of the post member is received within the central opening of the spring and is locked within the concave volume thereof when the fastening member is received and held within the central threaded axial bore of the post member.

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