# US 10,245,158 B2 · Cage for spinal interbody fusion

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- Number: US 10,245,158 B2
- Document ID: US10245158B2
- Status: Granted
- Kind: B2
- Application number: 15/740,953
- Filed: 2016-05-03
- Published: 2018-07-05
- Granted: 2019-04-02
- Earliest claimed: 2015-06-29
- Applicants: Kwang Yong Song
- Inventors: Kwang Yong Song
- Web page: https://patentgrep.com/patent/US10245158B2

## CPC

- A61F 2/447: {substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section}
- A61F 2/44: for the spine, e.g. vertebrae or spinal discs
- A61F 2/4455: {for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages (intervertebral discs A61F2/442)}
- A61F 2/4611: {of spinal prostheses}
- A61L 27/06: Titanium or titanium alloys
- A61L 27/56: Porous materials, {e.g. foams or sponges}
- A61F 2002/3008: {radio-opaque, e.g. radio-opaque markers}
- A61F 2002/30125: {elliptical or oval}
- A61F 2002/30261: {parallelepipedal}
- A61F 2002/30593: {hollow}
- A61F 2002/30622: {Implant for fusing a joint or bone material}
- A61F 2002/30777: {Oblong apertures}
- A61F 2002/30789: {perpendicular with respect to each other}
- A61F 2002/30904: {serrated profile, i.e. saw-toothed}
- A61F 2002/3092: {having an open-celled or open-pored structure}
- A61F 2002/448: {comprising multiple adjacent spinal implants within the same intervertebral space or within the same vertebra, e.g. comprising two adjacent spinal implants}
- A61F 2310/00023: Titanium or titanium-based alloys, e.g. Ti-Ni alloys
- A61F 2310/00029: Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
- A61F 2310/00059: Chromium or Cr-based alloys
- A61L 2430/38: for reconstruction of the spine, vertebrae or intervertebral discs
- 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)
- A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K)

## Abstract

One embodiment of the present invention provides a cage for spinal interbody fusion, which has sufficient durability and allows for bone fusion with a bone implanted to the anterior disk as well as fusion between vertebrae, thereby achieving a more stable bone fusion. The cage for spinal interbody fusion according to the embodiment of the present invention comprises a cage body and a tip which is formed to extend from the cage body and have a predetermined curvature. Further, the cage body has a cavity part which is formed to penetrate from the top surface to the bottom surface of the cage body with a projection part having a plurality of projections formed on the top surface and the bottom surface, and at least one perforation part, which is perforated from the side surface adjacent to the top surface or the bottom surface to the direction of the cavity part, and is located in the anterior direction of the cavity part.

## Claims

### Claim 1

A cage for spinal interbody fusion comprising:
a cage body; and
a tip part formed by extending from the cage body with a predetermined curvature,
wherein the cage body comprises:
a cavity part formed by penetrating from a top surface to a bottom surface of the cage body;
projection parts having a plurality of projections formed on the top surface and the bottom surface; and
at least one perforation part which is perforated from a side surface adjacent to the top surface or the bottom surface toward the cavity part, and is located in an anterior direction of the cavity part;
wherein the tip part includes a concavely curved groove formed in an upper portion thereof being recessed in a concave curved shape with a predetermined depth, and has a form continued to the cavity part and the perforation part, thus to increase an exposed surface area of a bone chip or bone substitute such as an artificial bone or autogenous bone; and
the perforation part is formed so as to have a larger inclination in an anterior direction continued to the tip part than an inclination in a posterior direction continued to the cage body, and has an inner surface which is formed by sloping so as to be decreased a cross section of the perforation part toward an inside from an outside thereof, thus to satisfy durability and increase an exposed surface area of the bone chip or bone substitute such as an artificial bone or autogenous bone.

### Claim 2 (depends on 1)

The cage for spinal interbody fusion according to claim 1, wherein the perforation part is formed across the cage body and the tip part.

### Claim 3 (depends on 2)

The cage for spinal interbody fusion according to claim 2, wherein the perforation part is formed in an ellipse shape.

### Claim 4 (depends on 1)

The cage for spinal interbody fusion according to claim 1, wherein the tip part has a curvature value which is larger than a first curvature value and smaller than a second curvature value, and wherein the second curvature value is one-half of the first curvature value when the tip part has a hemispherical shape.

### Claim 5 (depends on 1)

The cage for spinal interbody fusion according to claim 1, further comprising a connection part connected to an insertion rod.

### Claim 6 (depends on 1)

The cage for spinal interbody fusion according to claim 1, further comprising at least one insertion hole formed at a predetermined position of the cage body, and a marker inserted into the at least one insertion hole that is made of a metal material, whereby the installation position of the cage body can be identified.

### Claim 7 (depends on 6)

The cage for spinal interbody fusion according to claim 6, further comprising at least one insertion hole formed at predetermined position of the tip part, and a marker inserted into the at least one insertion hole of the tip part that is made of a metal material, whereby the installation position of the tip part can be identified.

### Claim 8 (depends on 1)

The cage for spinal interbody fusion according to claim 1, wherein the cage body and the tip part are made of a titanium (Ti) alloy material containing one or two metals selected from a group consisting of cobalt (Co) and chromium (Cr).

### Claim 9 (depends on 8)

The cage for spinal interbody fusion according to claim 8, wherein the cage body is made of a material further containing a radiolucent material that allows an installation position of the cage body to be determined.

### Claim 10 (depends on 1)

The cage for spinal interbody fusion according to claim 1, wherein all or a part of the cage body and the tip part are formed as porous structures.