# US 11,076,961 B2 · Components for artificial joints

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- Number: US 11,076,961 B2
- Document ID: US11076961B2
- Status: Granted
- Kind: B2
- Application number: 16/242,282
- Filed: 2019-01-08
- Published: 2019-05-09
- Granted: 2021-08-03
- Earliest claimed: 2016-04-11
- Assignees: Arthrex, Inc.
- Applicants: Arthrex, Inc.
- Inventors: Eric Zajac
- Web page: https://patentgrep.com/patent/US11076961B2

## CPC

- A61F 2/389: {Tibial components (A61F2/3868 takes precedence)}
- A61B 17/1604: {Chisels; Rongeurs; Punches; Stamps}
- A61F 2/30767: {Special external or bone-contacting surface, e.g. coating for improving bone ingrowth}
- A61F 2/3859: {Femoral components}
- A61F 2/3886: {for stabilising knees against anterior or lateral dislocations}
- A61F 2/461: {of knees}
- A61F 2/40: for shoulders
- A61F 2/4612: {of shoulders}
- A61F 2002/30011: {differing in porosity}
- A61F 2002/30112: {Rounded shapes, e.g. with rounded corners}
- A61F 2002/30332: {Conically- or frustoconically-shaped protrusion and recess}
- A61F 2002/30433: {using additional screws, bolts, dowels, rivets or washers e.g. connecting screws}
- A61F 2002/30604: {modular}
- A61F 2002/30769: {madreporic}
- A61F 2002/30878: {with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts}
- A61F 2002/30884: {Fins or wings, e.g. longitudinal wings for preventing rotation within the bone cavity}
- A61F 2002/30892: {parallel}
- A61F 2002/30925: {etched}
- A61F 2002/4619: {for extraction}
- A61F 2310/00407: Coating made of titanium or of Ti-based 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)
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

A component of an artificial joint according to an exemplary aspect of the present disclosure includes, inter alia, a base plate and a post selectively removable from the base plate. Further, an outer surface of the post includes a layer of the bone ingrowth material along substantially the entire length of the post.

## Claims

### Claim 1

A method, comprising:
removing a base plate from a post of a component of an artificial joint such that the post is left within bone, wherein the post has an overall length extending from a superior end of the post to an inferior end of the post, wherein the post includes bone ingrowth material covering the post from the superior end to a point along the post spaced-apart the superior end of the post by a distance between 75% and 85% of the overall length of the post, and wherein the post is free of bone ingrowth material between the point and the inferior end of the post;
separating bone adjacent the layer of bone ingrowth material from the post; and
removing the post from the bone.

### Claim 2 (depends on 1)

The method as recited in claim 1, wherein the step of removing the base plate from the post includes loosening a fastener connecting the base plate and the post.

### Claim 3 (depends on 2)

The method as recited in claim 2, wherein the base plate includes a rim establishing a pocket, and the fastener rests flush with the pocket when connected to the post.

### Claim 4 (depends on 1)

The method as recited in claim 1, wherein the step of separating bone adjacent the layer of bone ingrowth material includes using a reamer or a chisel to free the post from the bone.

### Claim 5 (depends on 1)

The method as recited in claim 1, wherein the inferior end of the post is rounded.

### Claim 6 (depends on 1)

The method as recited in claim 1, wherein the post includes a cylindrical body along a majority of the overall length of the post.

### Claim 7 (depends on 1)

The method as recited in claim 1, wherein the post projects further from an inferior surface of the base plate than all other structures of the component.

### Claim 8 (depends on 1)

The method as recited in claim 1, wherein the bone ingrowth material is provided by a layer of etched metal.

### Claim 9 (depends on 1)

The method as recited in claim 1, wherein the bone ingrowth material is provided on an outer diameter of the post.

### Claim 10 (depends on 1)

The method as recited in claim 1, wherein the post includes a pair of wings projecting from an outer diameter of the post in a posterior direction.

### Claim 11 (depends on 10)

The method as recited in claim 10, wherein the wings have superior surfaces lying in a common plane with the superior end of the post.

### Claim 12 (depends on 10)

The method as recited in claim 10, wherein anterior and posterior faces of the wings include bone ingrowth material.