# US 7,407,513 B2 · Artificial spinal disk

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 7,407,513 B2
- Document ID: US7407513B2
- Status: Granted
- Kind: B2
- Application number: 10/838,515
- Filed: 2004-05-03
- Published: 2005-05-19
- Granted: 2008-08-05
- Earliest claimed: 2003-05-02
- Assignees: Smart Disc, Inc.
- Inventors: Neville Alleyne; James R. Gerchow; Makoto Nonaka; Philip James Sluder
- Web page: https://patentgrep.com/patent/US7407513B2

## CPC

- A61F 2/4405: {for apophyseal or facet joints, i.e. between adjacent spinous or transverse processes (devices implanted between spinous or transverse processes A61B17/7062)}
- A61F 2/4425: {made of articulated components}
- A61F 2/446: {having a circular or elliptical cross-section substantially parallel to the axis of the spine, e.g. cylinders or frustocones}
- A61F 2002/2835: {Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material}
- A61F 2002/30133: {kidney-shaped or bean-shaped}
- A61F 2002/30365: {with additional means for limiting said rotation}
- A61F 2002/30369: {Limited lateral translation of the protrusion within a larger recess}
- A61F 2002/30383: {made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove}
- A61F 2002/30387: {Dovetail connection}
- A61F 2002/30433: {using additional screws, bolts, dowels, rivets or washers e.g. connecting screws}
- A61F 2002/30492: {using a locking pin}
- A61F 2002/30495: {using a locking ring}
- A61F 2002/305: {Snap connection}
- A61F 2002/30507: {using a threaded locking member, e.g. a locking screw or a set screw}
- A61F 2002/30517: {using a locking plate}
- A61F 2002/30579: {with mechanically expandable devices, e.g. fixation devices}
- A61F 2002/30599: {stackable}
- A61F 2002/30604: {modular}
- A61F 2002/30662: {with rotation-limiting means}
- A61F 2002/30663: {multiaxial, e.g. biaxial; multipolar, e.g. bipolar or having an intermediate shell articulating between the ball and the socket}
- A61F 2002/30685: {Means for reducing or preventing the generation of wear particulates}
- A61F 2002/30841: {Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes}
- A61F 2002/30884: {Fins or wings, e.g. longitudinal wings for preventing rotation within the bone cavity}
- A61F 2002/443: {having two transversal endplates and at least one intermediate component}
- A61F 2220/0025: Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F 2220/0033: made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
- A61F 2220/0041: using additional screws, bolts, dowels or rivets, e.g. connecting screws
- A61F 2230/0015: Kidney-shaped, e.g. bean-shaped
- A61F 2250/0063: Nested prosthetic parts
- A61F 2310/00017: Iron- or Fe-based alloys, e.g. stainless steel
- A61F 2310/00023: Titanium or titanium-based alloys, e.g. Ti-Ni alloys
- A61F 2310/0058: Coating made of diamond or of diamond-like carbon DLC
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)

## Abstract

An artificial spinal disk comprises a central capsule that is configured to slide laterally within the disk space with one or more of flexion, extension, and lateral bending of the spine so as to shift an instantaneous center of rotation of the artificial disk. In one embodiment, the invention comprises an artificial spinal disk comprising a first plate having an inwardly directed surface, a second plate having an inwardly directed surface facing generally toward the inwardly directed surface of the first plate, and a central capsule with outwardly directed opposed faces that slidably mate with the inwardly directed surfaces of the first and second plates.

## Claims

### Claim 1

An artificial spinal disk comprising:
a first bone plate comprising a plurality of segments configured to attach to a first vertebral body;
a second bone plate comprising a plurality of segments configured to attach to a second vertebral body;
a central capsule comprising:
a first central capsule plate configured to attach to said first bone plate and having an inwardly directed surface;
a second central capsule plate configured to attach to the second bone plate and having an inwardly directed surface facing generally toward said inwardly directed surface of said first central capsule plate; and
a pair of coupled sliding disks with outwardly directed opposed faces that slidably mate with respective ones of said inwardly directed surfaces of said first and second central capsule plates, wherein each of said sliding disks has an opening therethrough and is attached to a respective one of said central capsule plates with a retainer disk, said retainer disk being attached to a post coupled to said respective central capsule plate, said post extending through said opening, and said retainer disk having a surface larger than said opening in the sliding disk to capture said sliding disk between said retainer disk and said inwardly directed surface of said central capsule plate such that said sliding disk slides along and between spaced apart surfaces of said retainer disk and said central capsule plate.

### Claim 2 (depends on 1)

The artificial spinal disk of claim 1, wherein at least one of said outwardly directed surfaces of said central capsule is convexly curved toward a mating inwardly directed surface of a central capsule plate.

### Claim 3 (depends on 1)

The artificial spinal disk of claim 1, wherein the central capsule is configured to slide laterally within the disk space with one or more of flexion, extension, and lateral bending of the spine so as to shift an instantaneous center of rotation of the artificial disk.

### Claim 4 (depends on 1)

The artificial disk of claim 1, wherein said first and second sliding disks are coupled along a circumferential edge thereof

### Claim 5

A surgical kit for spinal surgery comprising:
a first bone plate, wherein the first bone plate is configured for attachment to a first vertebral body;
a second bone plate, wherein the second bone plate is configured for attachment to a second vertebral body;
a central capsule, wherein the central capsule is configured to couple to said first bone plate and said second bone plate, wherein said central capsule comprises:
a first and second endplate each having a concave surface;
a first sliding disk and a second sliding disk configured to fit with the concave surfaces of said first endplate and said second endplate respectively, and wherein each of said sliding disks has an opening therethrough and is attached to a respective one of said endplates with a retainer disk attached to a post coupled to said respective endplate, said post extending through said opening, and wherein said retainer disk has a surface larger than said opening in the sliding disk to slidably capture said sliding disk between said retainer disk and said concave surface of said endplate such that said sliding disk slides along and between spaced apart surfaces of said retainer disk and said endplate;
wherein the first bone plate and the second bone plate attach to said central capsule via grooves on each of said first and second bone plates which slidably attach to tongues on each of said first and second endplates; and
wherein said first bone plate, said second bone plate, and said central capsule are uncoupled from one another to allow for separate placement into the disk space during spine surgery.

### Claim 6 (depends on 5)

The surgical kit of claim 5, wherein said first bone plate and said second bone plate comprise a plurality of uncoupled segments.