# US 10,864,019 B2 · Systems and methods for joint replacement > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,864,019 B2 - Document ID: US10864019B2 - Status: Granted - Kind: B2 - Application number: 16/229,477 - Filed: 2018-12-21 - Published: 2019-08-22 - Granted: 2020-12-15 - Earliest claimed: 2008-07-24 - Assignees: OrthAlign, Inc. - Applicants: OrthAlign, Inc. - Inventors: Nicholas van der Walt; Santiago P. Borja - Web page: https://patentgrep.com/patent/US10864019B2 ## CPC - A61B 17/7017: {pneumatic or hydraulic means} - A61B 17/154: {for preparing bone for knee prosthesis} - A61B 17/155: {Cutting femur} - A61B 17/157: {Cutting tibia} - A61B 17/1707: {using electromagnetic effects, e.g. with magnet and external sensors} - A61B 17/1764: {for the knee} - A61B 34/20: Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis - A61B 34/25: {User interfaces for surgical systems} - A61B 2034/2048: {using an accelerometer or inertia sensor} - A61B 2090/067: {for measuring angles} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract Systems and methods for joint replacement are provided. The systems and methods include a surgical orientation device and at least one orthopedic fixture. The surgical orientation 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, to distract a joint, or to otherwise assist in an orthopedic procedure or procedures. ## Claims ### Claim 1 A knee distraction device comprising: a tibial component; a femoral component; at least one adjustment device configured to allow at least one degree of freedom between the tibial component and the femoral component; and a portable surgical orientation device comprising: a housing, at least one inertial sensor, and an user interface comprising a display, wherein the display is configured to provide visual cues instructing the user as to a subsequent surgical step. ### Claim 2 (depends on 1) The system of claim 1, wherein the display is configured to provide visual cues instructing the user to balance the tension between the ligaments in the knee. ### Claim 3 (depends on 1) The system of claim 1, wherein the knee distraction device is configured to distract the knee joint by movement of the at least one adjustment device. ### Claim 4 (depends on 1) The system of claim 1, wherein the knee distraction device is configured to facilitate balancing of the soft tissue and/or ligaments within the knee joint. ### Claim 5 (depends on 1) The system of claim 1, wherein the knee distraction device is configured to facilitate attachment of a cutting block to the distal femur for resection. ### Claim 6 (depends on 1) The system of claim 1, wherein the knee distraction device is configured to measure and display tension within the soft tissue. ### Claim 7 (depends on 1) The system of claim 1, wherein the tibial component comprises a tibial baseplate. ### Claim 8 (depends on 1) The system of claim 1, wherein the femoral component is configured to contact the femoral condyles. ### Claim 9 (depends on 1) The system of claim 1, further comprising a femoral resection guide. ### Claim 10 (depends on 1) The system of claim 1, wherein the at least one adjustment device comprises a rack and pinion. ### Claim 11 A knee distraction device comprising: a tibial component; a femoral component; at least one adjustment device configured to allow at least one degree of freedom between the tibial component and the femoral component; and a portable surgical orientation device comprising: a housing, at least one inertial sensor, and a user interface comprising a display, wherein the display is configured to provide instructions to the user to position the knee prior to insertion of the knee distraction device. ### Claim 12 (depends on 11) The system of claim 11, wherein the knee distraction device is configured to distract the knee joint by movement of the at least one adjustment device. ### Claim 13 (depends on 11) The system of claim 11, wherein the knee distraction device is configured to facilitate balancing of the soft tissue and/or ligaments within the knee joint. ### Claim 14 (depends on 11) The system of claim 11, wherein the knee distraction device is configured to facilitate attachment of a cutting block to the distal femur for resection. ### Claim 15 (depends on 11) The system of claim 11, wherein the knee distraction device is configured to measure and display tension within the soft tissue. ### Claim 16 (depends on 11) The system of claim 11, wherein the knee distraction device is configured to be inserted when the knee is in extension. ### Claim 17 (depends on 11) The system of claim 11, wherein the knee distraction device is configured to be inserted when the knee is in flexion. ### Claim 18 A knee distraction device comprising: a tibial component; a femoral component; at least one adjustment device configured to allow at least one degree of freedom between the tibial component and the femoral component; and a portable surgical orientation device comprising: a housing, at least one inertial sensor, and a user interface comprising a display, wherein the display is configured to instruct the user to balance the tension between soft tissue and/or ligaments in the knee. ### Claim 19 (depends on 18) The system of claim 18, wherein the knee distraction device is configured to distract the knee joint by movement of the at least one adjustment device. ### Claim 20 (depends on 18) The system of claim 18, wherein the knee distraction device is configured to facilitate attachment of a cutting block to the distal femur for resection.