US 7,794,502 B2Granted

Implant with openings adapted to receive bone screws

AssigneeWarsaw Orthopedic, Inc.

InventorGary K. Michelson

Life of this patent

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Abstract

A spinal fusion implant for insertion between adjacent vertebral bodies has opposed upper and lower surfaces adapted to contact each of the adjacent vertebral bodies from within the disc space, a leading end for insertion between the adjacent vertebral bodies, and a trailing end opposite the leading end. The trailing end has an exterior surface and an outer perimeter with an upper edge and a lower edge adapted to be oriented toward the adjacent vertebral bodies, respectively, and a plurality of bone screw receiving holes. At least one of the bone screw receiving holes is adapted to only partially circumferentially surround a trailing end of a bone screw received therein. At least one of the bone screw receiving holes passes through the exterior surface and one of the edges so as to permit the trailing end of the bone screw to protrude beyond one of the edges.

Claims20

Dependent claims

An orthopedic implant for use in a human body, said implant comprising:

a distal portion adapted to be placed toward at least one bone of the human body and a proximal portion opposite said distal portion, said proximal portion having a perimeter;
at least a first bone screw receiving hole passing through said proximal portion, said first bone screw receiving hole having an entrance and an exit passing through a first side of said perimeter without passing through a second side of said perimeter opposite said first side, at least said entrance of said first bone screw receiving hole having an incomplete perimeter for partially circumferentially surrounding a trailing end of a bone screw;
and
at least a second bone screw receiving hole passing through said proximal portion, said second bone screw receiving hole having an entrance and an exit passing through said second side of said perimeter without passing through said first side of said perimeter, at least said entrance of said second bone screw receiving hole having an incomplete perimeter for partially circumferentially surrounding a trailing end of another bone screw.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 12/290,180Filed 28 Oct 2008 · continuation
Priority: 23 Jan 2001
Published: US 2009/0062921 A15 Mar 2009
Granted: 14 Sep 2010
Term ends: Not estimatedThe source records don’t support an estimate.

Classification20 codes

A61F 2/4611
For insertion or extraction of endoprosthetic joints or of accessories thereof: of spinal prostheses
A61F 2/4455
For the spine, e.g. vertebrae or spinal discs: for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion…
A61B 17/86
Fasteners therefor or fasteners being internal fixation devices: pins or screws or threaded wires; nuts therefor
A61F 2002/2817
Bones: bone stimulation by chemical reactions or by osteogenic or biological products for enhancing ossification, e.g. by bone morphogenetic or…

Family

Application09/768,991Parent of this continuation · filed 23 Jan 2001
Application11/291,038Parent of this continuation · filed 30 Nov 2005
US 2009/0062921 A1Pre-grant publication · published 5 Mar 2009
US 7,442,209 B2Parent of this continuation
US 6,972,019 B2Parent of this continuation
US 2002/0099376 A1Published application
US 2006/0079961 A1Published application
US 7,794,502 B2This patent

From the US filing history. Foreign family members aren’t listed.