Children type tumor joint prosthesis with reserved femoral neck and knee joint surface

Abstract

The invention provides a child type tumor joint prosthesis retaining a femoral neck and a knee joint surface. The child type tumor joint prosthesis comprises a diaphysis extension section, and the two ends of the diaphysis extension section are connected with a proximal femoral prosthesis and a distal femoral prosthesis in an assembled mode respectively; porous structure grooves with bone trabecula are formed in the joint surface of the proximal femur prosthesis and the femur and the joint surface of the distal femur prosthesis and the femoral condyle; a thighbone outer side steel plate is detachably connected to the outer side of the thighbone far-end prosthesis; the proximal femur prosthesis and the femur are connected through the proximal femur central tension nail and the proximal femur auxiliary nail, and the distal femur prosthesis and the femoral condyle are connected through the locking nail and the cancellous bone tension nail. The prosthesis is connected with metaphyseal tissues of the upper section of the femur and the far end of the femur, and the bone growth function of the child patient is reserved. The bone growth of a postoperative child patient is not limited by the steel plate, after the prosthesis and bone tissue form firm biological fixation, the steel plate on the outer side of the thighbone can be detached, and the stability and the reliability of the prosthesis are further improved by adding the internally and externally crossed cancellous bone tension nails.

Description

[0001] This patent application is a divisional application with application number 202010689397.5, application date 20200715, and invention title "A Child-type Tumor Joint Prosthesis Preserving Femoral Neck and Knee Articular Surface". technical field [0002] 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 [0003] 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 resect...

AI Technical Summary

Problems solved by technology

After the surgical replacement of such patients, the growth function of the affected limb is often affected. After a long time, the left and right legs are not equal in length, walking with lameness and other phenomena. In severe cases, extended revision surgery is required.

[0004] At present, the most commonly used reconstruction method is to use extendable prosthesis to reconstruct bone defects, but there are many problems such as multiple operations, large trauma to patients (traditional extendable prosthesis), high economic cost, limited extension distance, Disadvantages of uncertain long-term efficacy

In addition, there are some prostheses that retain the articular surface, and the inner and outer sides of the distal femur of the prosthesis are fixed with steel plates. This kind of steel plate encircling structure on both sides has clinical feedback after surgery such as swelling around the joint, pain, limited knee flexion, and The problem that the steel plate is large and difficult to sew

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