# US 10,765,530 B2 · Surgical implant devices incorporating porous surfaces

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- Number: US 10,765,530 B2
- Document ID: US10765530B2
- Status: Granted
- Kind: B2
- Application number: 14/339,508
- Filed: 2014-07-24
- Published: 2015-01-15
- Granted: 2020-09-08
- Earliest claimed: 2012-06-21
- Assignees: Renovis Surgical Technologies, Inc.
- Applicants: Renovis Surgical Technologies, Inc.
- Inventors: John C. Steinmann; Scott Rucker; Tim Rasmussen; John P. Steinmann; Trace Cawley; Thomas Ross; Ernesto Rios; Andrew Olcese
- Web page: https://patentgrep.com/patent/US10765530B2

## CPC

- A61F 2/447: {substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section}
- A61F 2/30907: {Nets or sleeves applied to surface of prostheses or in cement}
- A61F 2/34: Acetabular cups
- A61F 2/4465: {having a circular or kidney shaped cross-section substantially perpendicular to the axis of the spine}
- B22F 10/28: Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
- B23K 15/00: Electron-beam welding or cutting
- A61B 17/86: Pins or screws {or threaded wires; nuts therefor (A61B17/72 take precedence)}
- A61F 2002/30011: {differing in porosity}
- 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 2002/30593: {hollow}
- A61F 2002/30774: {internally-threaded}
- A61F 2002/30777: {Oblong apertures}
- A61F 2002/30784: {Plurality of holes}
- A61F 2002/30785: {parallel}
- A61F 2002/30787: {inclined obliquely with respect to each other}
- A61F 2002/30909: {Nets}
- A61F 2002/30911: {having a honeycomb structure}
- A61F 2002/3093: {for promoting ingrowth of bone tissue}
- A61F 2310/00023: Titanium or titanium-based alloys, e.g. Ti-Ni alloys
- A61F 2310/00796: Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite
- B22F 10/80: Data acquisition or data processing
- B22F 2005/005: {Article surface comprising protrusions}
- Y02P 10/25: Process efficiency
- 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)
- B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A surgical implant device, comprising: a body portion; and one or more surfaces comprising a plurality of protruding structures; wherein the body portion and the one or more surfaces comprising the plurality of protruding structures are integrally formed. The one or more surfaces comprising the plurality of protruding structures are formed by an additive manufacturing process. The plurality of protruding structures comprise a plurality of needles. Optionally, the surgical implant device comprises one of an anterior lumbar interbody fusion cage, a posterior lumbar interbody fusion cage, a transforaminal lumbar interbody fusion cage, an oblique lumbar interbody fusion cage, a cervical cage, and a bone screw.

## Claims

### Claim 1

A method for manufacturing a surgical implant device, comprising:
providing a metallic body portion;
forming one or more metallic surfaces comprising a metallic osteo-porous or osteo-derived layer to approximate a scanned three-dimensional spongy bone surface, said osteo-porous or osteo-derived layer comprising an irregular lattice having randomized intersecting strut locations and cross-sectional diameters on an exterior portion of the metallic body portion; and
forming a plurality of protruding metallic structures on the metallic body portion and on the one or more metallic surfaces comprising the metallic osteo-porous or osteo-derived layer comprising the irregular lattice having randomized intersecting strut locations and cross-sectional diameters, wherein the plurality of protruding metallic structures comprising a plurality of needles that increase the coefficient of friction of the one or more metallic surfaces;
wherein the one or more metallic surfaces comprising the metallic osteo-porous or osteo-derived layer comprising the irregular lattice having randomized intersecting strut locations and cross-sectional diameters and the plurality of protruding metallic structures are integrally formed by an additive manufacturing process in which metallic material of the metallic osteo-porous or osteo-derived layer comprising the irregular lattice having randomized intersecting strut locations and cross-sectional diameters is disposed on the metallic body portion forming an integral body of the surgical implant; and wherein:
(1) some of the plurality of protruding metallic structures comprising a plurality of needles are relatively longer needles and are coupled directly to the metallic body portion and coupled through and directly to the irregular lattice and (2) some intervening of the plurality of protruding metallic structures comprising a plurality of needles are relatively shorter than the relatively longer needles and are coupled directly only to the irregular lattice and not coupled directly to the metallic body portion;
Wherein the plurality of protruding metallic structures comprising a plurality of needles comprise at least two different shapes and are disposed in at least two different orientations with respect to the metallic body portion; and
Fabricating and finishing any external surfaces of the one or more metallic surfaces comprising a metallic osteo-porous or osteo-derived layer and the plurality of protruding metallic structures comprising a plurality of needles using an abrasive blast to create microtexture in any of the external surfaces.

### Claim 2 (depends on 1)

The method of claim 1, wherein the plurality of needles are disposed substantially perpendicular to the body portion.

### Claim 3 (depends on 1)

The method of claim 1, wherein the plurality of needles are disposed at an angle to the body portion.

### Claim 4 (depends on 1)

The method of claim 1, wherein the plurality of needles comprise titanium.

### Claim 5 (depends on 1)

The method of claim 1, wherein the body portion defines a hollow interior cavity.

### Claim 6 (depends on 1)

The method of claim 1, wherein the body portion defines one or more ports that are configured to receive a bone screw.