# US 9,433,511 B2 · Interbody spinal implant having a roughened surface topography

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- Number: US 9,433,511 B2
- Document ID: US9433511B2
- Status: Granted
- Kind: B2
- Application number: 14/456,049
- Filed: 2014-08-11
- Published: 2014-11-27
- Granted: 2016-09-06
- Earliest claimed: 2005-05-06
- Assignees: Titan Spine, LLC
- Applicants: Titan Spine, LLC
- Inventors: Charanpreet S. Bagga; Peter F. Ullrich, Jr.
- Web page: https://patentgrep.com/patent/US9433511B2

## CPC

- A61F 2/4465: {having a circular or kidney shaped cross-section substantially perpendicular to the axis of the spine}
- 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 2/30965: {Reinforcing the prosthesis by embedding particles or fibres during moulding or dipping}
- A61F 2002/2817: {Bone stimulation by chemical reactions or by osteogenic or biological products for enhancing ossification, e.g. by bone morphogenetic or morphogenic proteins [BMP] or by transforming growth factors [TGF]}
- A61F 2002/2835: {Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material}
- A61F 2002/30014: {differing in elasticity, stiffness or compressibility}
- A61F 2002/30133: {kidney-shaped or bean-shaped}
- A61F 2002/30405: {made by screwing complementary threads machined on the parts themselves}
- A61F 2002/30593: {hollow}
- A61F 2002/30604: {modular}
- A61F 2002/30772: {Apertures or holes, e.g. of circular cross section}
- A61F 2002/30785: {parallel}
- A61F 2002/30836: {knurled}
- A61F 2002/30892: {parallel}
- A61F 2002/30906: {shot- sand- or grit-blasted}
- A61F 2002/30925: {etched}
- 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 2002/4629: {connected to the endoprosthesis or implant via a threaded connection}
- A61F 2220/0025: Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F 2230/0015: Kidney-shaped, e.g. bean-shaped
- A61F 2250/0018: differing in elasticity, stiffness or compressibility
- 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: 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 interbody spinal implant including a body having a top surface, a bottom surface, opposing lateral sides, opposing anterior and posterior portions, a substantially hollow center, and a single vertical aperture. The single vertical aperture extends from the top surface to the bottom surface, has a size and shape predetermined to maximize the surface area of the top surface and the bottom surface available proximate the anterior and posterior portions while maximizing both radiographic visualization and access to the substantially hollow center, and defines a transverse rim. The body may be non-metallic and may form one component of a composite implant; the other component is a metal plate disposed on at least one of the top and bottom surfaces of the body.

## Claims

### Claim 1

An implant, comprising a body that is generally oval-shaped in transverse cross section and comprises a top surface, a bottom surface, opposing lateral sides, opposing anterior and posterior portions, a substantially hollow center, an irregular edge at the junction of the anterior portion and the top surface and at the junction of the anterior portion and the bottom surface, and a single vertical aperture extending from the top surface to the bottom surface, having maximum width at its center and between the opposing lateral sides, and defining a transverse rim on the top surface and on the bottom surface, said transverse rim having variable width or thickness and at least a portion with a roughened surface topography capable of gripping bone and inhibiting migration of the implant once the implant is inserted between adjacent vertebral endplates, wherein the transverse rim on the top surface and the transverse rim on the bottom surface each excludes teeth.

### Claim 2 (depends on 1)

The implant of claim 1, wherein the body comprises a metal.

### Claim 3 (depends on 2)

The implant of claim 2, wherein the metal comprises titanium or an alloy thereof.

### Claim 4 (depends on 1)

The implant of claim 1, wherein the junction of the posterior portion and the top surface, and the junction of the posterior portion and the bottom surface comprises a blunt and radiused surface without the roughened surface topography.

### Claim 5 (depends on 1)

The implant of claim 1, wherein the body comprises at least one transverse aperture extending through each of the opposing lateral sides and which is in communication with the substantially hollow center.

### Claim 6 (depends on 1)

The implant of claim 1, wherein the body comprises a lordotic angle.

### Claim 7 (depends on 1)

The implant of claim 1, wherein the anterior portion comprises at least one opening extending through the anterior portion and which is in communication with the substantially hollow center.

### Claim 8 (depends on 1)

The implant of claim 1, wherein the irregular edge is sharp.

### Claim 9 (depends on 1)

The implant of claim 1, wherein the irregular edge resists expulsion of the implant when the implant is within the intervertebral space.

### Claim 10

An implant, comprising a body that is generally curved-shaped in transverse cross section and comprises a top surface, a bottom surface, opposing lateral sides, opposing anterior and posterior portions, a substantially hollow center, an irregular edge at the junction of the anterior portion and the top surface and at the junction of the anterior portion and the bottom surface, and a single vertical aperture extending from the top surface to the bottom surface, having maximum width at its center and between the opposing lateral sides, and defining a transverse rim on the top surface and on the bottom surface, said transverse rim having variable width or thickness and at least a portion with a roughened surface topography capable of gripping bone and inhibiting migration of the implant once the implant is inserted between adjacent vertebral endplates, wherein the transverse rim on the top surface and the transverse rim on the bottom surface each excludes teeth.

### Claim 11 (depends on 10)

The implant of claim 10, wherein the body comprises a metal.

### Claim 12 (depends on 11)

The implant of claim 11, wherein the metal comprises titanium or an alloy thereof.

### Claim 13 (depends on 10)

The implant of claim 10, wherein the junction of the posterior portion and the top surface, and the junction of the posterior portion and the bottom surface comprises a blunt and radiused surface without the roughened surface topography.

### Claim 14 (depends on 10)

The implant of claim 10, wherein the body comprises at least one transverse aperture extending through each of the opposing lateral sides and which is in communication with the substantially hollow center.

### Claim 15 (depends on 10)

The implant of claim 10, wherein the body comprises a lordotic angle.

### Claim 16 (depends on 10)

The implant of claim 10, wherein the anterior portion comprises at least one opening extending through the anterior portion and which is in communication with the substantially hollow center.

### Claim 17 (depends on 10)

The implant of claim 10, wherein the irregular edge is sharp.

### Claim 18 (depends on 10)

The implant of claim 10, wherein the irregular edge resists expulsion of the implant when the implant is within the intervertebral space.

### Claim 19

An implant, comprising a body that is generally rectangular-shaped in transverse cross section and comprises a top surface, a bottom surface, opposing lateral sides, opposing anterior and posterior portions, a substantially hollow center, an irregular edge on the top surface and on the bottom surface, and a single vertical aperture extending from the top surface to the bottom surface, having maximum width at its center and between the opposing lateral sides, and defining a transverse rim on the top surface and on the bottom surface, said transverse rim having variable width or thickness and at least a portion with a roughened surface topography capable of gripping bone and inhibiting migration of the implant once the implant is inserted between adjacent vertebral endplates, wherein the transverse rim on the top surface and the transverse rim on the bottom surface each excludes teeth.

### Claim 20 (depends on 19)

The implant of claim 19, wherein the body comprises a metal.

### Claim 21 (depends on 20)

The implant of claim 20, wherein the metal comprises titanium or an alloy thereof.

### Claim 22 (depends on 19)

The implant of claim 19, wherein the junction of the posterior portion and the lateral sides is rounded.

### Claim 23 (depends on 19)

The implant of claim 19, wherein the body comprises at least one transverse aperture extending through each of the opposing lateral sides and which is in communication with the substantially hollow center.

### Claim 24 (depends on 19)

The implant of claim 19, wherein the body comprises a lordotic angle.

### Claim 25 (depends on 19)

The implant of claim 19, wherein the irregular edge is sharp.

### Claim 26 (depends on 19)

The implant of claim 19, wherein the irregular edge resists expulsion of the implant when the implant is within the intervertebral space.

### Claim 27

An implant, comprising a body that is generally oval-shaped in transverse cross section, and comprises a top surface, a bottom surface, opposing lateral sides, opposing anterior and posterior portions, a solid rear wall extending substantially the entire width and height of the body, a substantially hollow center, at least one irregular edge, and a single vertical aperture extending from the top surface to the bottom surface, having maximum width at its center and between the opposing lateral sides, and defining a transverse rim on the top surface and on the bottom surface, said transverse rim having at least a portion with a roughened surface topography capable of gripping bone an inhibiting migration of the implant once the implant is inserted between adjacent vertebral endplates, wherein the transverse rim on the top surface and the transverse rim on the bottom surface each excludes teeth.

### Claim 28 (depends on 27)

The implant of claim 27, wherein the body comprises a metal.

### Claim 29 (depends on 28)

The implant of claim 28, wherein the metal comprises titanium or an alloy thereof.

### Claim 30 (depends on 27)

The implant of claim 27, wherein the body comprises at least one transverse aperture extending through each of the opposing lateral sides and which is in communication with the substantially hollow center.

### Claim 31 (depends on 27)

The implant of claim 27, wherein the body comprises a lordotic angle.

### Claim 32 (depends on 27)

The implant of claim 27, wherein the irregular edge is sharp.

### Claim 33 (depends on 27)

The implant of claim 27, wherein the irregular edge resists expulsion of the implant when the implant is within the intervertebral space.

### Claim 34

An implant, comprising a body that is generally box-shaped in transverse cross section, and comprises a top surface, a bottom surface, opposing lateral sides, opposing anterior and posterior portions, a solid wall extending substantially the entire width and height of the body, a substantially hollow center, at least one irregular edge, and a single vertical aperture extending from the top surface to the bottom surface, having maximum width at its center, and defining a transverse rim on the top surface and on the bottom surface, said transverse rim having at least a portion with a roughened surface topography capable of gripping bone an inhibiting migration of the implant once the implant is inserted between adjacent vertebral endplates, wherein the transverse rim on the top surface and the transverse rim on the bottom surface each excludes teeth.

### Claim 35 (depends on 34)

The implant of claim 34, wherein the body comprises a metal.

### Claim 36 (depends on 35)

The implant of claim 35, wherein the metal comprises titanium or an alloy thereof.

### Claim 37 (depends on 34)

The implant of claim 34, wherein the body comprises at least one transverse aperture extending through each of the opposing lateral sides and which is in communication with the substantially hollow center.

### Claim 38 (depends on 34)

The implant of claim 34, wherein the body comprises a lordotic angle.

### Claim 39 (depends on 34)

The implant of claim 34, wherein the irregular edge is sharp.

### Claim 40 (depends on 34)

The implant of claim 34, wherein the irregular edge resists expulsion of the implant when the implant is within the intervertebral space.