# US 2014/0194998 A1 · Marking template for installing a custom replacement device for resurfacing a femur and associated installation method

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- Number: US 2014/0194998 A1
- Document ID: US20140194998A1
- Status: Published application
- Kind: A1
- Application number: 14/207,014
- Filed: 2014-03-12
- Published: 2014-07-10
- Earliest claimed: 2000-03-17
- Assignees: Kinamed, Inc.
- Applicants: Kinamed, Inc.
- Inventors: Roger Carignan; Clyde R. Pratt
- Web page: https://patentgrep.com/patent/US20140194998A1

## CPC

- A61F 2/3859: {Femoral components}
- A61B 17/1764: {for the knee}
- A61B 34/10: Computer-aided planning, simulation or modelling of surgical operations
- A61F 2/30942: {for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques}
- A61F 2/3877: {Patellae or trochleae}
- A61F 2/461: {of knees}
- A61F 2/4657: {Measuring instruments used for implanting artificial joints (for surgical instruments A61B90/06)}
- A61B 17/00491: {Surgical glue applicators}
- A61B 2034/108: {Computer aided selection or customisation of medical implants or cutting guides}
- A61F 2/30767: {Special external or bone-contacting surface, e.g. coating for improving bone ingrowth}
- A61F 2002/30125: {elliptical or oval}
- A61F 2002/30594: {slotted, e.g. radial or meridian slot ending in a polar aperture, non-polar slots, horizontal or arcuate slots}
- A61F 2002/30685: {Means for reducing or preventing the generation of wear particulates}
- A61F 2002/30892: {parallel}
- A61F 2002/30948: {using computerized tomography, i.e. CT scans}
- A61F 2002/30952: {using CAD-CAM techniques or NC-techniques}
- A61F 2002/30957: {using a positive or a negative model, e.g. moulds}
- A61F 2002/4658: {for measuring dimensions, e.g. length}
- A61F 2230/0008: elliptical or oval
- 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 2310/00029: Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
- A61F 2310/00203: containing alumina or aluminium oxide
- A61F 2310/00239: containing zirconia or zirconium oxide ZrO2
- A61F 2310/00407: Coating made of titanium or of Ti-based alloys
- A61F 2310/00796: Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite
- Y10S 623/901: Method of manufacturing prosthetic device
- Y10T 29/49764: with testing or indicating
- 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)
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A replacement device for resurfacing a joint surface of a femur and a method of making and installing such a device is provided. The custom replacement device is designed to substantially fit the trochlear groove surface, of an individual femur, thereby creating a “customized” replacement device for that individual femur and maintaining the original kinematics of the joint. The top surface is designed so as to maintain centrally directed tracking of the patella perpendicular to the plane established by the distal end of the femoral condyles and aligned with the center of the femoral head.

## Claims

### Claim 1

A method comprising:
a. receiving a surgical instrument manufactured using pre-operative data, thereby configuring the surgical instrument based on the pre-operative data to mount to a particular patient's distal-anterior portion of a femur in a pre-defined spatial arrangement, the surgical instrument further comprising a three-dimensional tissue contacting geometry and a surgical tool guide, such that the surgical tool guide is in a pre-defined spatial arrangement relative to the three-dimensional tissue contacting geometry;
b. placing the surgical instrument on the distal-anterior portion of the particular patient's femur; and
c. using the surgical tool guide to guide a tool.

### Claim 2 (depends on 1)

The method of claim 1, wherein the surgical tool guide comprises at least two drill guides configured to guide a formation of pin receiving openings in the femur of the particular patient.

### Claim 3 (depends on 1)

The method of claim 1, wherein the surgical tool guide comprises a hole extending through a body of the surgical instrument.

### Claim 4 (depends on 1)

The method of claim 1, wherein the surgical tool guide comprises a slot extending through a body of the surgical instrument.

### Claim 5 (depends on 1)

The method of claim 1, wherein the surgical tool guide comprises a plurality of holes extending through a body of the surgical instrument.

### Claim 6 (depends on 1)

The method of claim 1, wherein the surgical tool guide comprises at least one hole extending through a body of the surgical instrument, the at least one hole configured to guide a drill for drilling an opening in the femur of the particular patient.

### Claim 7 (depends on 1)

The method of claim 1, wherein the surgical tool guide comprises at least one hole extending through a body of the instrument, the at least one hole configured to facilitate positioning at least one pin in the femur of the particular patient.

### Claim 8 (depends on 1)

The method of claim 1, wherein the step of using the surgical tool guide to guide a tool comprises drilling a hole in the particular patient's femur.

### Claim 9 (depends on 1)

The method of claim 1, further comprising positioning at least one pin in the femur of the particular patient.

### Claim 10 (depends on 1)

The method of claim 1, further comprising scraping away articular cartilage.

### Claim 11 (depends on 1)

The method of claim 1, further comprising implanting an implant.

### Claim 12 (depends on 1)

The method of claim 1, further comprising applying cement.

### Claim 13

A method comprising:
a. receiving a surgical instrument manufactured using pre-operative data, thereby configuring the surgical instrument based on the pre-operative data to mount to a particular patient's distal-anterior portion of a femur in a pre-defined spatial arrangement, the surgical instrument further comprising a three-dimensional tissue contacting geometry and a surgical tool guide, such that the surgical tool guide is in a pre-defined spatial arrangement relative to the three-dimensional tissue contacting geometry, and wherein the surgical tool guide comprises at least two cylindrical drill guides configured to guide a formation of pin receiving openings in the femur of the particular patient;
b. placing the surgical instrument on the distal-anterior portion of the particular patient's femur; and
c. using the surgical tool guide to guide a tool.

### Claim 14 (depends on 13)

The method of claim 13, wherein the surgical tool guide further comprises a hole extending through a body of the surgical instrument.

### Claim 15 (depends on 13)

The method of claim 13, wherein the surgical tool guide further comprises a slot extending through a body of the surgical instrument.

### Claim 16 (depends on 13)

The method of claim 13, wherein the surgical tool guide further comprises a plurality of holes extending through a body of the surgical instrument.

### Claim 17 (depends on 13)

The method of claim 13, wherein the surgical tool guide further comprises at least one hole extending through a body of the surgical instrument, the at least one hole configured to guide a drill for drilling an opening in the femur of the particular patient.

### Claim 18 (depends on 13)

The method of claim 13, wherein the surgical tool guide further comprises at least one hole extending through a body of the instrument, the at least one hole configured to facilitate positioning at least one pin in the femur of the particular patient.

### Claim 19 (depends on 13)

The method of claim 13, further comprising positioning at least one pin in the femur of the particular patient.

### Claim 20 (depends on 13)

The method of claim 13, wherein the step of using the surgical tool guide to guide a tool comprises drilling at least one hole in the particular patient's femur.

### Claim 21 (depends on 13)

The method of claim 13, further comprising scraping away articular cartilage.

### Claim 22 (depends on 13)

The method of claim 13, further comprising implanting an implant.

### Claim 23 (depends on 13)

The method of claim 13, further comprising applying cement.