Preoperative evaluation of rotary osteotomy for femoral head necrosis by finite element method
Femoral head necrosis is a common and refractory disease. Rotary osteotomy is the main method to preserve the femoral head for treatment of femoral head necrosis. The finite element method was used to analyze the mechanical properties of human bones before and after rotary osteotomy, to evaluate the effectiveness and accuracy of the surgery, and to lay a foundation for improving the curative effect and popularization of the surgery. CT images of hip joint of a patient were collected, and the finite element model before and after operation was established through 3D model extraction and optimization to obtain the stress changes before and after operation. The stress distribution of femur shows that the maximum stress area transfers back to the femoral shaft from the necrosis of the femoral head after surgery, and the maximum values of equivalent stress below the necrotic area before and after surgery are 27. 04, 10. 97 MPa, re-spectively, which decrease significantly, providing favorable conditions for subsequent conservative treatment.
rotary osteotomyfinite element analysisCT gray value assignmentimage processing
万方数据
维普
