Designing method of customized pelvis embedded prosthesis based on topological structural optimization

Abstract

The invention provides a designing method of a customized pelvis embedded prosthesis based on topological structural optimization. A designed prosthesis comprises two parts, namely a topological solidstructural part used for ensuring the strength of the prosthesis and a porous structural part used for maintaining an anatomic form, the topological solid part is a primary load bearing part, the strength of the prosthesis can be ensured and light weight can be achieved by using the the topological structural optimization method to design the topological solid structural part, and the porous structural part can maintain the anatomic form of a bone defect part and facilitate the growing of bone and the adhering of soft tissues to ensure the long-term stability of the prosthesis. The prosthesisdesigned by means of the method has the advantages of light weight, anatomic maintenance and good long-term stability, and therefore original functions of a reconstructed pelvis can be maintained tothe maximum extent to improve the life quality of a patient.

Description

technical field [0001] The invention belongs to the field of prosthesis design and manufacture, specifically relates to the concept of applying topology optimization and porous structure to pelvic prosthesis design, and proposes a personalized pelvic endoprosthesis design method based on topology optimization. technical background [0002] Pelvic tumor is a relatively common disease in pelvic injury. Pelvic tumors are insidious and difficult to diagnose in the early stage of the disease. Therefore, when patients are discovered, the lesion range is often already large, and surgery often requires a large area of ​​pelvic resection. In order to improve the quality of life of patients after pelvic amputation, the reconstruction of the pelvic defect is the key to restore the function of the lower limbs. [0003] The main methods of pelvic bone reconstruction include joint fusion, allogeneic bone reconstruction, autologous tumor bone inactivation, and artificial prosthesis recons...

AI Technical Summary

Problems solved by technology

[0005] (1) It is very difficult to fix the prosthesis and the residual pelvic bone. The technology of attaching soft tissue to the prosthesis has not been successful. Metal materials and human bones will never become a whole, and the loosening rate is high, often resulting in failure due to dislocation and pain;

[0006] (2) The structure of the human pelvis is special, and the design of the artificial prosthesis is difficult to meet the requirements, which often causes installation difficulties and postoperative entrapment of the sciatic nerve;

[0007] (3) The metal prosthesis is heavy, which limits the recovery of limb function after surgery

[0010] Based on the above discussion, although the integral prosthesis has some shortcomings, it has incomparable advantages when the pelvic defect is not too large.

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