Combined ankle-preserving and knee-preserving tibial shaft prosthesis

Abstract

The invention relates to a combined ankle-preserving and knee-preserving tibial shaft prosthesis, including a proximal tibial abutment and a mating segment prosthesis, wherein the base of the proximaltibial abutment is connected to the top of the mating segment prosthesis. The top of the proximal tibial abutment is provided with a bone trabecular structure the top surface center of which is provided with a groove, and the side of the proximal tibial abutment is provided with a plurality of U-shaped nail holes and a plurality of suture holes so as to reconstruct the patellar tendon and save the knee joint movement function. Two nail tracks are arranged side by side on both sides of the proximal tibial abutment. As that bone trabecular structure is use at the top of the proximal tibial abutment, the bone growth can be promoted, the groove on the top surface of the bone trabecular structure facilitates convenient insertion of cancellous bone, the artificial bone trabecula and the bone can be tightly combined, the purpose of reserving the epiphysis can be achieved, the bone growth ability of the child due to the epiphysis removal or destruction can be reduced, and the lower limb deformity can be avoided; The initial stability and long-term stability can be achieved by screw fixation, and the operation time and difficulty can be greatly reduced at the same time.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an assembled ankle-protecting knee-protecting tibial shaft prosthesis. Background technique [0002] The incidence of malignant bone tumors is more common in the metaphysis of the femur and tibia, especially around the knee joint. Malignant bone tumors are more common in children and adolescents. As an important load-bearing bone, the tibia is the main component of the knee joint. Through the application of neoadjuvant chemotherapy and adjuvant chemotherapy, early diagnosis and multidisciplinary assistance, the 5-year survival rate is close to 80%. The implementation of new surgical techniques, higher functional requirements of patients, improved design of prostheses, and the emergence of new imaging techniques have made limb salvage surgery possible beyond existing conventional treatments. [0003] However, the current treatment for malignant bone tumors of the proxim...

AI Technical Summary

Problems solved by technology

This method will destroy the metaphysis of the proximal tibia and distal femur on the affected side, which will have a huge impact on the bone growth on the affected side, resulting in unequal length of lower limbs and lameness, requiring multiple revision surgeries in the later stage

To ensure the patient's own knee joint and reconstruct the bone defect is not satisfied by the existing prosthesis

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