A few days ago, the team of Professor Yi Yi Xin of the Department of Orthopedics of Beijing Jishuitan Hospital proposed the “mathematical conversion formula of the sagittal angle of the cup”, which filled the international gap in the field and revealed the tradition that has dominated the field of hip reconstruction for nearly 50 years. The mathematical principle that the safe zone (Lewinek safe zone) cannot be established, and further established the Patient Specific Safe Zone (PSSZ) algorithm, breaking through the limitations of traditional theory and establishing a new personalized surgical planning method. Relevant research results were published in JBJS (Journal of Bone & Joint Surgery), an international authoritative journal of orthopedics, CORR (Clinical Orthopedics Related Research). This marks that the research level of the Orthopedic Orthopedics Research Team of Beijing Jishuitan Hospital in the direction of robot-assisted hip replacement has reached the international leading level, which has promoted the great progress of the theory of robot-assisted surgery planning, and opened a new chapter of quantitative analysis and mathematical decision-making for orthopaedic surgery. . In order to solve the problem of the correctness of the target value of hip reconstruction surgery, the team established a mathematical model and algorithm to combine the patient’s sagittal pelvis posture parameters in different postures such as standing, sitting, and squatting before surgery to avoid impingement, dislocation and hip The overload of the joint weight-bearing surface is the boundary condition to form a personalized kinematic safety zone to guide the precise reconstruction of robot-assisted THA surgery. While solving the target value of the acetabular side surgery, the team also made an unexpected and important discovery. If the femoral prosthesis is placed outside the range of 10°~20° during hip reconstruction, the ideal target value of the acetabulum prosthesis is “solved.” ” is much less likely, which means that the traditional practice of doing the acetabulum first in surgery may be wrong or at least not “optimal”. This finding not only defines a safety margin for femoral prostheses, but also suggests that there are good reasons to change the surgical procedure for traditional hip reconstruction.
Source: Guangming Daily