# US 2013/0158557 A1 · Anatomical concentric spheres tha

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- Number: US 2013/0158557 A1
- Document ID: US20130158557A1
- Status: Published application
- Kind: A1
- Application number: 13/330,259
- Filed: 2011-12-19
- Published: 2013-06-20
- Earliest claimed: 2011-12-19
- Assignees: Depuy Ireland Unlimited Company
- Inventors: Richard D. Komistek
- Web page: https://patentgrep.com/patent/US20130158557A1

## CPC

- A61B 17/15: Guides therefor
- A61B 17/1746: {for the acetabulum}
- A61F 2/4684: {Trial or dummy prostheses}
- A61F 2/32: for the hip
- A61F 2002/30578: {having apertures, e.g. for receiving fixation screws}
- A61F 2002/4663: {for measuring volumes or other three-dimensional shapes}
- A61F 2002/4687: {Mechanical guides for implantation instruments}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- 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

Devices and methods for identifying and maintaining the concentric spherical centers of a femur and acetabulum during revision or joint replacement surgery so that post surgery the anatomical spherical centers are maintained. Also disclosed are novel techniques and devices to project images onto an anatomical feature, such as exposed bone, to virtually fit trial prosthetic components, establish bone cut markings, and establishing the anatomical spherical center of a joint.

## Claims

### Claim 1

A trial for use with total hip arthroplasty, the trial comprising:
a first spherical insert having a plurality of tabs mounted thereto, each of the plurality of tabs at least partially defining an orifice.

### Claim at position 2

2-8. (canceled)

### Claim 9

A guide for establishing the spherical center of a femoral ball, the guide comprising:
a plurality of plates repositionable with respect to one another to overly and collectively approximate to the circumferential curvature of a distal femoral head, wherein the plurality of plates are operative to retain this approximation of circumferential curvature after dismounted from the distal femoral head.

### Claim at position 4

10-12. (canceled)

### Claim 13

A guide set for use in a total arthroplasty procedure, the guide set comprising:
a plurality of guides adapted to interpose a human acetabulum and a human proximal femur, each of the guides including an acetabular cup mounted to a partial femoral component, the partial femoral component including an endplate adapted to contact at least one of an exterior of the human proximal femur and a portion of the human proximal femur not exposed prior to a bone cut.

### Claim at position 6

14-53. (canceled)

### Claim 54

A sleeve for a prosthetic insert, the sleeve comprising:
a support structure adapted to be secured within an intramedullary canal of a bone, the support structure including an inner surface defining an interior channel adapted to receive a prosthetic implant, the inner surface having at least one of two projections and two grooves that are adapted to align with corresponding features of the prosthetic implant to guarantee proper orientation between the support structure and prosthetic implant upon axial insertion.

### Claim at position 8

55-59. (canceled)

### Claim 60

A proximal femoral prosthetic device, the device comprising:
a femoral stem adapted to be seated within an intramedullary canal of a femur; and,
an endplate mounted to the femoral stem, the endplate including a plurality of cut-outs at least partially accommodating throughput of a fastener.

### Claim 61 (depends on 60)

The proximal femoral prosthetic device of claim 60, wherein the fastener comprises at least one of a pin, a rod, a nail, and a screw.

### Claim at position 11

62-73. (canceled)

### Claim 74

A cutting guide for use with total hip arthroplasty, the cutting guide comprising:
an arcuate guide for coupling to a proximal femur, the cutting guide including a concave section that mimics the arc of a natural femoral ball of a hip joint, the cutting guide including a retainer to fasten the cutting guide to the proximal femur.

### Claim 75 (depends on 74)

The cutting guide of claim 74, wherein the retainer comprises a plate adapted to be adjacent an exterior of the proximal femur, the plate including at least one through orifice to receive a fastener.

### Claim 76 (depends on 75)

The cutting guide of claim 75, wherein the fastener includes at least one of a pin, a screw, a dowel, and a nail.

### Claim 77 (depends on 74)

The cutting guide of claim 74, wherein the retainer comprises at least two plates adapted to be adjacent an exterior of the proximal femur, at least one of the plates including at least one through orifice to receive a fastener.

### Claim 78 (depends on 77)

The cutting guide of claim 77, wherein the fastener includes at least one of a pin, a screw, a dowel, and a nail.

### Claim 79

A measurement instrument to measure at least one of diameter and circumference of removed femoral head.

### Claim 80

(canceled)