Children type tumor joint prosthesis reserving femur neck and knee joint surface

Abstract

The invention provides a children type tumor joint prosthesis reserving a femur neck and a knee joint surface. The children type tumor joint prosthesis reserving a femur neck and a knee joint surfacecomprises a backbone extension segment, wherein a femur near end prosthesis and a femur far end prosthesis are respectively assembled and connected to two ends of the backbone extension segment; porous structure grooves having bone trabecula are formed in the junction surface of the femur near end prosthesis and a femur and the junction surface of the femur far end prosthesis and femur condyle; afemur outside steel plate is in dismountable connection to the outer side of the femur far end prosthesis; and a femur near end central pulling force nail and femur near end assistant nail are connected with the femur near end prosthesis and the femur, and locking nails and spongy bone pulling force nails are connected with the femur far end prosthesis and the femur condyle. The prosthesis is connected with metaphyseal dysplasia tissue of a femur upper segment and a femur far end, and the bone growth function of a child patient is reserved. The situation that the skeleton growth of a postoperative child patient is not limited by the steel plate can be guaranteed, after the prosthesis and bone tissue form reliable biological fixation, the femur outside steel plate can be demounted, and theincreased spongy bone pulling force nails crossed inside and outside can further improve the stability and the reliability of the prosthesis.

Description

technical field [0001] The invention relates to the technical field of artificial prosthesis, in particular to a prosthetic joint for children with tumors that retains the femoral neck and knee articular surfaces. Background technique [0002] Primary and secondary malignant bone tumors are motor system tumors that seriously threaten the survival and quality of life of patients. With the development of surgical techniques, the innovation of tumor imaging technology and the development of neoadjuvant chemotherapy for patients with malignant tumors, limb salvage surgery has become a consensus in the treatment of malignant bone tumors. Malignant tumors that occur in the long backbone of the limbs need to follow the principle of extensive resection in clinical practice. Therefore, the reconstruction of the bone defect after tumor resection has attracted much attention, especially in children. In recent years, children are a frequent group of malignant bone tumors. The most comm...

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Problems solved by technology

[0004] The invention provides a child-type tumor joint prosthesis that retains the femoral neck and knee articular surface. The existing femoral reconstruction methods have the following problems. The long-term curative effect is uncertain. The plate installed on the outer side of the distal femur will cause swelling around the joint, pain, and limited knee flexion according to clinical feedback. The volume of the plate is too large to be sutured during the operation. The number of operations is high and the extension distance is limited.

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