Method for positioning prosthesis rotation angle safety area in unicompartmental knee arthroplasty

Abstract

The invention relates to a method for positioning a prosthesis rotation angle safety area in unicompartmental knee arthroplasty. The method is characterized by comprising the following steps of, 1) acquiring a personalized kinematics range of a knee joint of a patient before an operation or personalized kinematics data of the knee joint simulated in the operation of the patient; 2) performing three-dimensional dynamic preoperative planning based on the acquired personalized kinematics range of the knee joint of the patient to obtain a personalized tibial plateau prosthesis rotation safety areaof the patient; and 3) making a preoperative plan report, operative navigation, a patient-specific 3D printing operation tool and a robot-assisted operation scheme based on the personalized tibial plateau prosthesis rotation safety area of the patient obtained in the step 2). According to the method, tibial plateau prosthesis rotating direction safety range adapting to the personalized movement requirements of the patient is established on the basis of the knee joint kinematics data of different personalized postures and functions of the patient, the kinematics and dynamics requirements of the patient can be met, and therefore the method can be widely applied to the field of unicompartmental knee arthroplasty research.

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