# US 10,307,269 B2 · Instrumentation and methods for knee arthroplasty

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- Number: US 10,307,269 B2
- Document ID: US10307269B2
- Status: Granted
- Kind: B2
- Application number: 15/698,899
- Filed: 2017-09-08
- Published: 2017-12-28
- Granted: 2019-06-04
- Earliest claimed: 2014-08-23
- Applicants: Timothy Ray Miller
- Inventors: Timothy Ray Miller
- Web page: https://patentgrep.com/patent/US10307269B2

## CPC

- A61F 2/4657: {Measuring instruments used for implanting artificial joints (for surgical instruments A61B90/06)}
- A61B 34/10: Computer-aided planning, simulation or modelling of surgical operations
- A61B 90/08: {Accessories or related features not otherwise provided for}
- A61F 2/3859: {Femoral components}
- A61B 2034/108: {Computer aided selection or customisation of medical implants or cutting guides}
- A61B 2090/0807: {Indication means}
- A61F 2002/30616: {Sets comprising a plurality of prosthetic parts of different sizes or orientations}
- A61F 2002/30617: {Visible markings for adjusting, locating or measuring}
- A61F 2002/4658: {for measuring dimensions, e.g. length}
- A61F 2002/4668: {for measuring angles}
- A61F 2002/469: {electrical}
- 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

Instrumentation and methods are provided for knee arthroplasty which permit rotation of a distal femoral component in the sagittal plane. A guide provides for determination of both a femoral component size and rotation angle at which to install the implant in any specific patient.

## Claims

### Claim 1

A method of performing knee arthroplasty procedures, comprising the steps of:
using a femoral component of a selected size on patients with differing sized femurs by performing, on a patient by patient basis,
determining an angle of rotation in the sagittal plane relative to a datum feature of a specific patient's femur at which to install said femoral component, said angle at which to install said femoral component being variable from patient to patient, and
installing said femoral component of said selected size on said specific patient's femur with a distal resection made at said angle determined in said determining step.

### Claim 2 (depends on 1)

The method of claim 1, wherein said determining step is performed using a guide which is rotated about an end of said specific patient's femur.

### Claim 3 (depends on 1)

The method of claim 1, wherein said determining step is performed using one or more computer-generated models which take as input medical images of said specific patient's femur.

### Claim 4 (depends on 3)

The method of claim 3, further comprising generating the computer-generated models from computed tomography (CT) or magnetic resonance imaging (MRI) imaging.

### Claim 5 (depends on 1)

The method of claim 1, further comprising a step of determining the selected size of said femoral component.

### Claim 6 (depends on 5)

The method of claim 5, wherein the steps of determining an angle and determining a size are performed simultaneously.

### Claim 7 (depends on 1)

The method of claim 1, wherein said datum feature is a femoral longitudinal axis.

### Claim 8 (depends on 1)

The method of claim 1, wherein the installing step comprises resecting further portions of the specific patient's femur, and wherein the resecting step is performed subsequent to the step of determining an angle of rotation in the sagittal plane.

### Claim 9 (depends on 1)

The method of claim 1, further comprising a step of operatively accessing the specific patient's femur, wherein the determining step is performed after the accessing step.

### Claim 10 (depends on 1)

The method of claim 1, wherein the installing step further comprises avoiding notching of an anterior femur using the determined angle of rotation in the sagittal plane.

### Claim 11

A method of performing a knee arthroplasty procedure, comprising
determining an angle of rotation in the sagittal plane relative to a datum feature of a specific patient's femur at which to install a femoral component, said angle at which to install said femoral component being variable from patient to patient, and
installing said femoral component on said specific patient's femur with a distal resection made at said angle determined in said determining step, said femoral component being of a selected size, wherein said selected size of femoral component is usable on patients with differing sized femurs.

### Claim 12 (depends on 11)

The method of claim 11, wherein said determining step is performed using a guide which is rotated about an end of said specific patient's femur.

### Claim 13 (depends on 11)

The method of claim 11, wherein said determining step is performed using one or more computer-generated models which take as input medical images of said specific patient's femur.

### Claim 14 (depends on 13)

The method of claim 13, further comprising generating the computer-generated models from computed tomography (CT) or magnetic resonance imaging (MM) imaging.

### Claim 15 (depends on 11)

The method of claim 11, further comprising a step of determining the selected size of said femoral component.

### Claim 16 (depends on 15)

The method of claim 15, wherein the steps of determining an angle and determining the selected size are performed simultaneously.

### Claim 17 (depends on 11)

The method of claim 11, wherein said datum feature is a femoral longitudinal axis.

### Claim 18 (depends on 11)

The method of claim 11, wherein the installing step comprises resecting further portions of the specific patient's femur, and wherein the resecting step is performed subsequent to the step of determining an angle of rotation in the sagittal plane.

### Claim 19 (depends on 11)

The method of claim 11, further comprising a step of operatively accessing the specific patient's femur, wherein the determining step is performed after the accessing step.

### Claim 20 (depends on 11)

The method of claim 11, wherein the installing step further comprises avoiding notching of an anterior femur using the determined angle of rotation in the sagittal plane.