A method for locating the safe zone of prosthesis rotation angle in knee unicondylar replacement

Abstract

The invention relates to a method for locating the safety zone of the prosthesis rotation angle in knee joint single ankle replacement, which is characterized in that it comprises the following steps: 1) obtaining the individualized kinematic range of the patient's preoperative knee joint or the simulated knee joint of the patient during the operation The individualized kinematics data of the joint; 2) Based on the acquired individualized kinematics range of the patient's knee joint, three-dimensional dynamic preoperative planning is performed to obtain the patient's individualized tibial platform prosthesis rotation safety zone; 3) Based on the obtained data in step 2 Patient-specific tibial platform prosthesis rotation safety zone, formulate preoperative planning report, surgical navigation, patient-specific 3D printing surgical tools, and robot-assisted surgical plans. Based on the knee joint kinematics data of different postures and functions personalized by the patient, the present invention establishes the safety range of the rotation direction of the tibial plateau prosthesis that adapts to the patient's individualized motion requirements, and can meet the patient's kinematics-dynamics requirements. Therefore, it can be used extensively. It is used in the research field of knee arthroplasty.

Description

technical field [0001] The invention relates to the research field of knee joint unicondyle replacement, in particular to a method for locating the safety zone of the rotation angle of a prosthesis in knee joint unicondylar replacement. Background technique [0002] Unicompartmental knee replacement is an effective treatment for unicompartmental arthritis of the medial or lateral knee. Knee single ankle replacement surgery usually uses mechanical surgical tools to perform osteotomy, soft tissue release and prosthesis placement with reference to bony anatomy. In traditional surgical methods, the positioning of the prosthesis is usually based on the experience of the surgeon, and the rotation of the tibial prosthesis mainly depends on the anterior and posterior axis of the tibial plateau, the direction of flexion of the femoral condyle, and the position of the anterior superior iliac spine. Therefore, the traditional method is prone to cause the following problems: [0003] ...

AI Technical Summary

Problems solved by technology

[0003] 1. Inaccurate positioning of anatomical landmarks, for example, the anterior superior iliac spine cannot be fully exposed during surgery

[0004] 2. Poor direction or position of the prosthesis is prone to occur, especially the rotation of the tibial plateau prosthesis. Due to the lack of reliable anatomical landmarks to locate the dynamic rotation range of the tibiofemoral joint, it is difficult to determine the optimal rotation position of the tibial plateau prosthesis, and postoperative false Body impact, wear, dislocation and other complications

[0005] 3. It is impossible to design accurate personalized prosthesis positions to meet the kinematic-dynamic needs of patients

[0006] 4. Since the range of motion of the lateral condyle is significantly larger than that of the medial condyle, it is more difficult to determine the rotation position of the prosthesis in patients with lateral unicondylar replacement surgery relying on traditional methods

[0007] 5. Since there is no load-bearing and no active contraction of the muscles around the knee joint during the simulated knee joint flexion and extension activities during the operation, its kinematic characteristics cannot accurately reflect the postoperative knee joint movement characteristics, and it is impossible to effectively rule out the poor position of the prosthesis