Titanium alloy hemipelvic prosthesis capable of individually retaining part of acetabulum through 3D printing

Abstract

The invention discloses a titanium alloy hemipelvic prosthesis capable of individually retaining part of the acetabulum through 3D printing. The titanium alloy hemipelvic prosthesis comprises a prosthesis contact surface matched with the sacrum, a prosthesis contact surface matched with the rest acetabulum and a cylindrical structure for connecting the two prosthesis contact surfaces, wherein a porous structure is designed on the contact surface attached to the bone tissue, a covered edge is arranged outside the porous structure, two screw holes are formed in the middle of the porous structure, and the prosthesis and the adjacent bone tissue can be fixed by screws, so that early stability is obtained and long-term stability is achieved. The prosthesis contact surfaces are designed according to imaging data collected in the early stage and can be perfectly matched with the sacrum and the rest acetabulum of a patient, and the cylindrical structure is optimally designed through finite element mechanical analysis and a topological structure. The titanium alloy hemipelvic prosthesis is designed according to the remodeling requirement of the residual acetabulum of the underage patient after acetabulum tumor resection, and a relatively good hip joint function can be obtained by restoring the acetabulum structure after remodeling.

Description

technical field [0001] The invention relates to the manufacture of medical internal fixation implants, in particular to a 3D printed individualized hemipelvic prosthesis with part of the acetabulum preserved. Background technique [0002] The pelvis is the starting and ending point of a large number of muscles. There are abundant communication vessels and lack of natural tissue barriers. Malignant tumors that occur in bone tissue can easily penetrate bone and enter soft tissue, and tumors from soft tissue can also easily invade bone. Pelvic tumors are divided into primary tumors and metastatic tumors. The former is mainly seen in chondrosarcoma, osteosarcoma, and Ewing sarcoma; metastatic tumors are commonly seen in bone metastases from malignant tumors such as breast cancer, thyroid cancer, kidney cancer, prostate cancer, and lung cancer. Due to the complex anatomical structure and deep location of the pelvis, pelvic tumors often have an insidious onset. It often takes a l...

AI Technical Summary

Problems solved by technology

[0006] However, the currently designed hemi-pelvic prostheses are all aimed at adults, and all of them are aimed at reconstruction after total acetabular resection. However, due to the immature bone development of children, the pelvic structure is somewhat different from that of adults. In addition, children have pelvic tumors involving the acetabulum. Precise osteotomy through the "Y" shape of the cartilage is often used, thereby preserving a part of the acetabulum that can still continue to grow

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