SYSTEMS AND METHODS FOR JOINT REPLACEMENT

• US 20180168826A1
• Filed: 09/27/2017
• Published: 06/21/2018
• Est. Priority Date: 07/24/2009
• Status: Active Grant

• Current Assignee: Orthalign, Inc.
• Original Assignee: Orthalign, Inc.
• Inventors: van der Walt, Nicholas, Shapiro, Charles, Lane, Richard, Ryan, Matt
• Granted Patent: US 10,238,510 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 17/1764 for the knee
• CPC Class Codes: A61B 17/56 Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
• CPC Class Codes: A61B 2034/108 Computer aided selection or customisation of medical implants or cutting guides
• CPC Class Codes: A61B 2034/2048 using an accelerometer or inertia sensor
• CPC Class Codes: A61B 2562/0219 Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
• CPC Class Codes: A61B 34/10 Computer-aided planning, simulation or modelling of surgical operations
• CPC Class Codes: A61B 34/20 Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
• CPC Class Codes: A61B 5/1121 Determining geometric values, e.g. centre of rotation or angular range of movement
• CPC Class Codes: A61F 2/4657 Measuring instruments used for implanting artificial joints for surgical instruments A61B90/06

Abstract

Systems and methods for joint replacement are provided. The systems and methods include a surgical orientation device, a reference sensor device, and at least one orthopedic fixture. The surgical orientation device, reference sensor device, and orthopedic fixtures can be used to locate the orientation of an axis in the body, to adjust an orientation of a cutting plane or planes along a bony surface, or otherwise to assist in an orthopedic procedure(s).

Claims

1. An implant alignment device comprising:

an orthopedic fixture having a base configured to couple with a distal portion of a femur or a proximal portion of a tibia, a moveable portion configured to move relative to the base, and a guide member configured to couple with the moveable portion;

a reference device coupled to or integrally formed with the base or moveable portion of the orthopedic fixture, the reference device configured to sense changes in orientation of a long axis of the femur or tibia relative to a fixed reference frame; and

a surgical orientation device coupled to or integrally formed with the base or moveable portion of the orthopedic fixture to enable positioning of the guide member in a prescribed orientation relative to the proximal tibia or distal femur.

2. The alignment device of claim 1, wherein the orthopedic fixture is capable of movement in at least two degrees of freedom to vary the orientation of the guide about at least two axes.

3. The alignment device of claim 1, wherein the reference device is disposed in a housing and wherein the base comprises a first mounting portion configured to be secured to the proximal portion of a tibia on a first lateral side and a second mounting portion on a second lateral side, the second mounting portion configured to couple with the housing of the reference device.

4. The alignment device of claim 1, wherein the orthopedic fixture comprises a femoral jig assembly, the femoral jig assembly comprising a microblock assembly and a cutting block assembly, the femoral jig assembly being releasably attachable to:

(i) the surgical orientation device via a coupling device,

(ii) the reference device via an interface support member, and

(iii) distal condyles of a femur via the microblock assembly,

wherein the microblock assembly further comprises a distal guide configured to engage a distal aspect of the femur in connection with positioning the femoral jig.

5. The alignment device of claim 4, wherein the microblock assembly comprises one or more movement devices and a member configured to support the movement device(s), the member further comprising an anterior portion configured receive a plurality of mounting pins and a posterior portion configured to extend posteriorly from the anterior portion to engage a distal portion of the femur in connection with positioning the femoral jig.

6. A surgical orientation system comprising:

a surgical orientation device comprising;

a first portable housing configured to be coupled with a knee bone by way of one or more orthopedic fixtures;

a first sensor located within the first housing, the first sensor configured to monitor the orientation of the first sensor in a coordinate system and to generate a signal corresponding to the orientation of the surgical orientation device relative to the coordinate system; and

a display module configured to display an indication of a change in one or more angle measurements relative to the coordinate system based at least in part on the signal; and

a reference device comprising;

a second portable housing configured to connect to a knee bone by way of one or more orthopedic fixtures; and

a second sensor located within the second housing, the second sensor configured to monitor the orientation of the second sensor relative to the coordinate system, the second sensor configured to generate orientation data corresponding to the monitored orientation of the reference device;

an orthopedic fixture configured to be connected to a knee bone and with the surgical orientation device and reference sensor such that the surgical orientation device and reference device are separately moveable relative to each other;

wherein at least one of the surgical orientation device and reference device is further configured to determine the spatial location of the mechanical axis of the leg.

7. The surgical orientation system of claim 6, wherein the surgical orientation device comprises at least one structure for facilitating releasable attachment to an orthopedic fixture.

8. The surgical orientation system of claim 6, wherein the reference device comprises at least one structure for facilitating releasable attachment to an orthopedic fixture.

9. The surgical orientation device of claim 6, wherein at least one of the surgical orientation device and reference device is configured to send information about the spatial location of the mechanical axis to the other of the surgical orientation device or reference device.