# US 2014/0194997 A1 · Marking template for installing a custom replacement device for resurfacing a femur and associated installation method

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2014/0194997 A1
- Document ID: US20140194997A1
- Status: Published application
- Kind: A1
- Application number: 14/206,494
- 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/US20140194997A1

## 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

An instrument comprising:
a body, the body including a femoral contacting side, the femoral contacting side having a three-dimensional shape configured to match at least a portion of a distal-anterior portion of a femur of a particular patient; and
a surgical tool guide, the surgical tool guide being customized for the particular patient whereby the surgical tool guide is in a pre-defined spatial arrangement with the three dimensional shape of the femoral contacting side.

### Claim 2 (depends on 1)

The instrument of claim 1, wherein the femoral contacting side is pre-operatively configured to continuously match in shape a region of a femoral trochlea spanning from a medial side of the femoral trochlea to a lateral side of the femoral trochlea.

### Claim 3 (depends on 1)

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

### Claim 4 (depends on 1)

The instrument of claim 1, wherein the femoral contacting side is a contiguous surface and is configured to contiguously match in shape to a femoral trochlea of the particular patient.

### Claim 5 (depends on 1)

The instrument of claim 1, wherein the body defines an outer boundary surface configured to indicate an outer boundary of a femoral implant relative to the femur of the particular patient.

### Claim 6 (depends on 1)

The instrument of claim 1, wherein the femoral contacting side is configured to match the particular patient's femoral trochlea surface to establish a pre-defined spatial arrangement of the instrument relative to an axis of the particular patient.

### Claim 7 (depends on 1)

The instrument of claim 1, wherein the femoral contacting side has a shape that is configured to match a subchondral bone surface of the femoral trochlea of the particular patient.

### Claim 8 (depends on 1)

The instrument of claim 1, wherein the femoral contacting side is generally concavely shaped in an anterior-posterior dimension and generally convexly shaped in a medial-lateral dimension.

### Claim 9

An instrument for use during an implant procedure and customized for a particular patient, the instrument comprising:
a body, the body including an articular region contacting surface, the articular region contacting surface having a three-dimensional shape configured to match at least a portion of a subchondral bone surface in a distal-anterior portion of a femur of the particular patient; and
a surgical tool guide, the surgical tool guide being customized for the particular patient whereby the surgical tool guide is in a pre-defined spatial arrangement with the three dimensional shape of the articular region contacting surface.

### Claim 10 (depends on 9)

The instrument of claim 9, wherein the articular region contacting surface is configured to match in shape at least a bottom portion of a trochlear groove of the particular patient.

### Claim 11 (depends on 10)

The instrument of claim 10, wherein the articular region contacting surface is further configured to match in shape an anterior portion of the femur of the particular patient.

### Claim 12 (depends on 10)

The instrument of claim 10, wherein the articular region contacting surface is configured to match in shape at least a portion of a trochlea of the distal femur of the particular patient, the portion spanning the trochlea from a medial side to a lateral side of the trochlea.

### Claim 13 (depends on 9)

The instrument of claim 9, wherein the articular region contacting surface is configured to match in shape at least a portion of an area of an anterior-distal femur of the particular patient between two condyles of the distal femur.

### Claim 14 (depends on 9)

The instrument of claim 9, wherein the articular region contacting surface is configured to match in shape at least a portion of an area of an anterior-distal femur of the particular patient between a superior edge of a cartilage surface and a point of attachment of an anterior cruciate ligament.

### Claim 15

An instrument for use during an implant procedure and customized for a particular patient, the instrument comprising:
a body, the body including an articular region contacting surface, the articular region contacting surface having a three-dimensional shape configured to match at least a portion of a cartilage surface in a distal-anterior portion of a femur of the particular patient; and
a surgical tool guide, the surgical tool guide being customized for the particular patient whereby the surgical tool guide is in a pre-defined spatial arrangement with the three dimensional shape of the articular region contacting surface.

### Claim 16 (depends on 15)

The instrument of claim 15, wherein the articular region contacting surface is configured to match in shape at least a portion of a distal-anterior portion of the particular patient's femur in an area inferior to a distal-anterior superior edge of the cartilage surface of the particular patient.

### Claim 17 (depends on 15)

The instrument of claim 15, wherein the articular region contacting surface is configured to match in shape at least a portion of a distal-anterior portion of the particular patient's femur in a defined spatial arrangement relative to an axis of the femur of the particular patient.

### Claim 18 (depends on 15)

The instrument of claim 15, wherein the articular region contacting surface is configured to match in shape to a trochlear groove of the particular patient's femur in a defined spatial arrangement relative to an axis of the femur that extends through a center of a femoral head of the particular patient.

### Claim 19

An instrument for use during an implant procedure and customized for a particular patient, the instrument comprising: a body and a surgical tool guide, the body comprising a femoral contacting side, the femoral contacting side configured to match in shape at least a portion of a distal-anterior portion of a femur of the particular patient.

### Claim 20 (depends on 19)

The instrument of claim 19, wherein the femoral contacting side is a surface that is configured to match in shape at least a portion of a subchondral bone surface of the distal-anterior portion of the particular patient's femur.

### Claim 21 (depends on 19)

The instrument of claim 19, wherein the femoral contacting side includes a surface configured to fit into a trochlear groove of the particular patient's femur.

### Claim 22 (depends on 21)

The instrument of claim 21, wherein the surface configured to fit into the trochlear groove is configured to match in shape the trochlear groove of the particular patient's femur.

### Claim 23 (depends on 19)

The instrument of claim 19, wherein the femoral contacting side is configured to match in shape the distal-anterior portion of the particular patient in a defined spatial arrangement relative to cartilage of the particular patient's distal femur.

### Claim 24 (depends on 19)

The instrument of claim 19, wherein the surgical tool guide comprises a hole or a slot extending through the body of the instrument.

### Claim 25 (depends on 19)

The instrument of claim 19, wherein the surgical tool guide comprises a plurality of holes extending through the body of the instrument.

### Claim 26 (depends on 19)

The instrument of claim 19, wherein the surgical tool guide comprises at least one hole extending through the body of the instrument, the at least one hole configured to guide a drill for drilling an opening in the femur of the particular patient.

### Claim 27 (depends on 19)

The instrument of claim 19, wherein the surgical tool guide comprises at least one hole extending through the 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 28 (depends on 19)

The instrument of claim 19, wherein the instrument comprises a marking template.