# US 9,867,716 B2 · Intervertebral disc prosthesis

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- Number: US 9,867,716 B2
- Document ID: US9867716B2
- Status: Granted
- Kind: B2
- Application number: 15/432,795
- Filed: 2017-02-14
- Published: 2017-08-03
- Granted: 2018-01-16
- Earliest claimed: 2004-12-22
- Assignees: LDR Medical
- Applicants: LDR Medical
- Inventors: Willem Zeegers
- Web page: https://patentgrep.com/patent/US9867716B2

## CPC

- A61F 2/4425: {made of articulated components}
- A61B 17/0642: {for bones, e.g. for osteosynthesis or connecting tendon to bone}
- A61F 2/30721: {Accessories}
- A61F 2/30734: {Modular inserts, sleeves or augments, e.g. placed on proximal part of stem for fixation purposes or wedges for bridging a bone defect}
- A61F 2/30749: {Fixation appliances for connecting prostheses to the body}
- A61F 2/442: {Intervertebral or spinal discs, e.g. resilient (non-disc-shaped intervertebral inflatable pockets A61F2/441; non-disc-shaped intervertebral fusion implants A61F2/4455)}
- A61F 2002/30331: {made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit}
- A61F 2002/30365: {with additional means for limiting said rotation}
- A61F 2002/30369: {Limited lateral translation of the protrusion within a larger recess}
- A61F 2002/30387: {Dovetail connection}
- A61F 2002/30471: {connected by a hinged linkage mechanism, e.g. of the single-bar or multi-bar linkage type}
- A61F 2002/305: {Snap connection}
- A61F 2002/30517: {using a locking plate}
- A61F 2002/30576: {with extending fixation tabs}
- A61F 2002/30616: {Sets comprising a plurality of prosthetic parts of different sizes or orientations}
- A61F 2002/30662: {with rotation-limiting means}
- A61F 2002/30729: {Separate collars}
- 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 2220/0091: connected by a hinged linkage mechanism, e.g. of the single-bar or multi-bar linkage type
- 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)
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

The present invention relates to an intervertebral disc prosthesis comprising at least three pieces including an upper plate, a lower plate, and a movable core at least in relation to a plate, wherein it also comprises at least one elongated movable osseous anchor comprising an insertion end disposed at a first longitudinal end of the anchor and a retention end disposed at a second longitudinal end of the anchor and a plate-like body disposed between the insertion end and the retention end.

## Claims

### Claim 1

A device for insertion between an upper vertebra and a lower vertebra of a spine, the device comprising:
a leading end disposed on a first side of the device;
a trailing end disposed on a second side of the device opposite the first side;
an elongated movable osseous anchor comprising an insertion end disposed at a first longitudinal end of the anchor and a retention end disposed at a second longitudinal end of the anchor, a plate-like body disposed between the insertion end and the retention end, and a curved portion disposed proximal to the retention end;
an upper vertebral contact surface configured for supportive contact with the lower surface of the upper vertebra;
a lower vertebral contact surface configured for supportive contact with the upper surface of the lower vertebra; and
a passage in the device opening proximal to an edge of the upper vertebral contact surface or the lower vertebral contact surface, the passage sized to accept the plate-like body and configured to position the curved portion at least partially around the edge with the insertion end extending away from the vertebral contact surface.

### Claim 2 (depends on 1)

The device of claim 1 in which the curved portion folds over and projects a plate-like extension disposed adjacent the plate-like body.

### Claim 3 (depends on 2)

The device of claim 2 in which the plate-like extension comprises an end disposed distal to the retention end and proximal to the insertion end.

### Claim 4 (depends on 2)

The device of claim 2 in which the plate-like extension comprises an end disposed distal to the retention end and proximal to the curved portion.

### Claim 5 (depends on 2)

The device of claim 2 in which the plate-like body and the plate-like extension each comprises retention notches on opposite edges.

### Claim 6 (depends on 1)

The device of claim 1 in which the curved portion interlocks on the edge of the upper vertebral contact surface.

### Claim 7 (depends on 6)

The device of claim 6 in which the passage is configured to permit a variable angle of interlock.

### Claim 8

A device for insertion between adjacent vertebrae of a spine, the device comprising:
a vertebral contact surface configured for supportive contact with a discal surface of one of the vertebrae;
a passage opening on the vertebral contact surface proximal to an edge of the vertebral contact surface;
a retainer on the vertebral contact surface disposed between the edge of the vertebral contact surface and the passage opening;
a fixation recess disposed on the vertebral contact surface; and
an elongated winglet-shaped anchor comprising a first longitudinal end and an opposite second longitudinal end, a side configured for placement adjacent the vertebral contact surface, a curved retainer disposed at the first longitudinal end and configured to pass through the passage and at least partially encircle the retainer, and a projection extending from the side configured to engage the fixation recess when the anchor is placed adjacent the vertebral contact surface with the curved retainer passing through the passage and at least partially encircle the retainer.

### Claim 9 (depends on 8)

The device of claim 8 in which the curved retainer disposed at the first longitudinal end of the anchor is configured to interlock with the retainer on the vertebral contact surface.

### Claim 10 (depends on 8)

The device of claim 8 in which the fixation recess is a groove.

### Claim 11 (depends on 8)

The device of claim 8 in which the projection is a pin or a dowel.

### Claim 12 (depends on 11)

The device of claim 11 in which the projection is conically shaped.

### Claim 13 (depends on 8)

The device of claim 8 in which the fixation recess comprises walls configured complementary to the sides of the projection.

### Claim 14 (depends on 8)

The device of claim 8 further comprising notches along a side of the anchor opposite the side of the anchor configured for placement adjacent the vertebral contact surface.

### Claim 15

A device for insertion between adjacent vertebrae of a spine, the device comprising:
a leading end;
a trailing end disposed on a side of the device opposite the first side;
a first vertebral contact surface;
a second vertebral contact surface;
a passage in the device opening proximal to a first edge of the first vertebral contact surface; and
an elongated movable osseous anchor comprising an insertion end disposed at a first longitudinal end of the anchor, a retention end disposed at a second longitudinal end of the anchor, a plate-like body disposed between the insertion end and the retention end, and a curved portion disposed proximal to the retention end;
a first configuration in which the osseous anchor is outside the passage; and
a second configuration in which a portion of the osseous anchor is disposed through the passage with the curved portion at least partially around the first edge of the first vertebral contact surface and the insertion end extending away from the first vertebral contact surface.

### Claim 16 (depends on 15)

The device of claim 15 in which the curved portion folds over and projects a plate-like extension disposed adjacent the plate-like body.

### Claim 17 (depends on 16)

The device of claim 16 in which the plate-like extension comprises an end disposed distal to the retention end and proximal to the insertion end.

### Claim 18 (depends on 16)

The device of claim 16 in which the plate-like extension comprises an end disposed distal to the insertion end and proximal to the curved portion.

### Claim 19 (depends on 16)

The device of claim 16 in which the plate-like body and the plate-like extension each comprises retention notches on opposite edges.

### Claim 20 (depends on 15)

The device of claim 15 in which the curved portion interlocks on the edge of the upper vertebral contact surface.