# US 2014/0156019 A1 · Prosthesis and implementation system

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- Number: US 2014/0156019 A1
- Document ID: US20140156019A1
- Status: Published application
- Kind: A1
- Application number: 14/174,409
- Filed: 2014-02-06
- Published: 2014-06-05
- Earliest claimed: 2006-05-31
- Assignees: Biomet Manufacturing, LLC
- Applicants: Biomet Manufacturing, LLC
- Inventors: Robert Metzger; Duke A. Fox
- Web page: https://patentgrep.com/patent/US20140156019A1

## CPC

- A61F 2/3662: {Femoral shafts}
- A61B 17/1675: {for the knee}
- A61B 17/1764: {for the knee}
- A61F 2/3859: {Femoral components}
- A61B 17/155: {Cutting femur}
- A61B 17/157: {Cutting tibia}
- A61B 2017/1602: {Mills}
- A61B 2090/034: {abutting on parts of the device itself}
- A61F 2/3886: {for stabilising knees against anterior or lateral dislocations}
- A61F 2002/3895: {unicompartimental}
- A61F 2002/4635: {using minimally invasive surgery}
- 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 method of positioning a femoral prosthesis relative to a femur. The method includes forming a first curved surface on a first condyle of the femur, and securing the femoral prosthesis to the femur such that a first curved bone-engaging surface of the femoral prosthesis mates with the first curved surface formed on the femur.

## Claims

### Claim 1

A method of positioning a femoral prosthesis relative to a femur comprising:
forming a first curved surface on a first condyle of the femur; and
securing the femoral prosthesis to the femur such that a first curved bone-engaging surface of the femoral prosthesis mates with the first curved surface formed on the femur.

### Claim 2 (depends on 1)

The method of claim 1, further comprising forming a second curved surface on a second condyle of the femur, and forming a planar surface on the femur.

### Claim 3 (depends on 2)

The method of claim 2, further comprising securing the femoral prosthesis to the femur such that a second curved bone-engaging surface of the femoral prosthesis mates with the second curved surface formed on the second condyle, and such that the femoral prosthesis mates with the planar surface.

### Claim 4 (depends on 1)

The method of claim 1, further comprising forming a first bone hole in the femur and securing the femoral prosthesis to the femur such that a first projection of the femoral prosthesis is seated within the first bone hole.

### Claim 5 (depends on 4)

The method of claim 4, further comprising forming a second bone hole in the femur and securing the femoral prosthesis to the femur such that a second projection of the femoral prosthesis is seated within the second bone hole.

### Claim 6 (depends on 4)

The method of claim 4, wherein the first projection is at the first curved bone-engaging surface of the femoral prosthesis.

### Claim 7 (depends on 1)

The method of claim 1, further comprising forming the first curved surface with a mill.

### Claim 8 (depends on 1)

The method of claim 1, further comprising forming the planar surface with a cutting guide block.

### Claim 9 (depends on 1)

The method of claim 1, further comprising forming the planar surface with a cutting guide block slidably mounted to a rail mounted to the femur.

### Claim 10

The method of 1, further comprising forming an incision in a dermis relative to a knee joint of about 2 cm to about 8 cm.

### Claim 11

A method of positioning a femoral prosthesis relative to a femur in an anatomy, comprising:
forming a first curved surface on a first portion of the femur;
forming a planar surface on the femur; and
positioning the femoral prosthesis to mate with both the first curved surface and the planar surface.

### Claim 12 (depends on 11)

The method of claim 11, further comprising:
forming a second curved surface on a second portion of the femur.

### Claim 13 (depends on 12)

The method of claim 12, wherein forming the first curved surface includes milling a first femoral condyle and forming the second curved surface includes milling a second femoral condyle.

### Claim 14 (depends on 11)

The method of claim 11, further comprising forming an incision in a dermis relative to a knee joint of about 2 cm to about 8 cm.

### Claim 15 (depends on 12)

The method of claim 12, further comprising:
determining a first position of a first mill guide and positioning the first mill guide in the first position;
determining a second position of a second mill guide and positioning the second mill guide in the second position;
forming the first curved surface with a mill using the first mill guide; and
forming the second curved surface with the mill using the second mill guide.

### Claim 16

A method of positioning a femoral prosthesis relative to a femur in an anatomy comprising:
forming a first bone hole in a first condyle of the femur;
mounting a guide track to the femur at the first bone hole;
forming a planar surface on the femur using a cutting guide block slidably mounted to the guide track;
forming a first curved surface on the first condyle; and
securing the femoral prosthesis to the femur such that a first curved bone-engaging surface of the femur mates with the first curved surface formed on the first condyle.

### Claim 17 (depends on 16)

The method of claim 16, further comprising forming the first curved surface with a mill.

### Claim 18 (depends on 17)

The method of claim 17, further comprising guiding the mill using a mill guide seated within the first bone hole.

### Claim 19 (depends on 16)

The method of claim 16, further comprising cutting a second condyle of the femoral bone using a guide mounted to the first bone hole formed in the first condyle.

### Claim 20 (depends on 16)

The method of claim 16, further comprising forming a second bone hole in a second condyle of the femur;
mounting the guide track to the femur at the second bone hole;
forming a second curved surface on the second condyle; and
securing the femoral prosthesis to the femur such that a second curved bone-engaging surface of the femoral prosthesis mates with the second curved surface formed in the second condyle.