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US7704255: Threadless multi-lock anterior cervical plating system

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Filing Information

Inventor(s) Gary K. Michelson ·
Assignee(s) Warsaw Orthopedic, Inc. ·
Attorney/Agent(s) Martin & Ferraro, LLP ·
Primary Examiner Pedro Philogene ·
Application Number US10883086
Filing date 07/01/2004
Issue date 04/27/2010
Prior Publication Data
Predicted expiration date 02/11/2018
U.S. Classifications 606/86B  · 606/280  · 606/289  ·
International Classifications A61B1758  · A61F500  ·
Kind CodeB2
Related U.S. Application DataRELATED APPLICATIONS
This application is a continuation of application Ser. No. 10/253,678, filed Sep. 24, 2002 now U.S. Pat. No. 6,916,320, which is a divisional of Ser. No. 09/754,733, filed Jan. 4, 2001, now U.S. Pat. No. 6,454,771, which is a continuation of application Ser. No. 09/022,293, filed Feb. 11, 1998, now U.S. Pat. No. 6,193,721, which claims the benefit of U.S. provisional application Ser. No. 60/037,139, filed Feb. 11, 1997; all of which are incorporated herein by reference. Application Ser. No. 09/022,344, filed Feb. 11, 1998, now U.S. Pat. No. 6,139,550, is incorporated herein by reference.
19 Claims, 21 Drawings


Abstract

Anatomically contoured anterior cervical plates with bone ingrowth surfaces, providing for intersegmental compressive preloading, and a rigid and locked interface to all of the bone screws, with those engaging the vertebrae deployed in highly convergent pairs. The bone screws have a tapered self-tapping leading end, an increasing root diameter with a generally constant outer diameter with a thread that is narrow and sharp throughout and an enlarged head portion capable of an interference fit to the receiving holes of the plate. Instrumentation consists of plate holders, a compression apparatus and a pilot hole forming device that interlocks with the plate. Methods for spinal compression and bone hole preparation are provided.

Independent Claims | See all claims (19)

  1. 1. A plate system adapted for application to the anterior human spine and for contacting at least a portion of the anterior aspects of at least two vertebral bodies, said plate system comprising: a plate having a longitudinal axis and a length sufficient to span a disc space and overlap portions of at least two adjacent vertebral bodies, said plate having a lower surface for placement against the vertebral bodies and an upper surface opposite said lower surface; at least two bone screw receiving holes extending through said plate from said upper surface through said lower surface, each of said bone screw receiving holes having a central longitudinal axis and being adapted to receive a bone screw to attach said plate to the spine; and a locking element for preventing the inadvertent backing out of at least two of the bone screws from within said bone screw receiving holes, said locking element being adapted to engage said plate to lock the bone screws without threading into said plate, wherein said locking element is adapted to be coupled to said plate prior to the insertion of the bone screws in said bone screw receiving holes, and adapted to move, while engaged to said plate, from a first position which permits the insertion of one of the bone screws into one of said bone screw holes to a second position which prevents the bone screw from backing out of said bone screw hole.
  2. 19. A plate system adapted for application to the anterior human spine and for contacting at least a portion of the anterior aspects of at least two vertebral bodies, said plate system comprising: a plate having a longitudinal axis and a length sufficient to span a disc space and overlap portions of at least two adjacent vertebral bodies, said plate having a lower surface for placement against the vertebral bodies and an upper surface opposite said lower surface; at least two bone screw receiving holes extending through said plate from said upper surface through said lower surface, each of said bone screw receiving holes having a central longitudinal axis and being adapted to receive a bone screw to attach said plate to the spine; and a locking element for preventing the inadvertent backing out of at least two of the bone screws from within said bone screw receiving holes, said locking element being adapted to engage said plate to lock the bone screws without threading into said plate, wherein said locking element is a rivet, and is adapted to move, while engaged to said plate, from a first position which permits the insertion of one of the bone screws into one of said bone screw holes to a second position which prevents the bone screw from backing out of said bone screw hole.

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Referenced By

Document NumberAssigneeInventorsIssue/Pub Date
US7875062 Warsaw Orthopedic, Inc. Gary S. Lindemann et al. Jan 2011
US8262708 Warsaw Orthopedic, Inc. Gary K. Michelson Sep 2012

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