An orthopedic distal femur osteotomy device and its positioning device

Abstract

The invention discloses a thighbone far-end osteotomy device for the orthopedics department and a positioning device thereof. The thighbone far-end osteotomy device comprises a thighbone far-end fixing plate. The center of the upper surface of the thighbone far-end fixing plate is connected with an intramedullary rod through welding. Two second connecting plates are welded to the lower surface ofthe thighbone far-end fixing plate. A lower end connecting and fixing plate is arranged at the lower portion of each second connecting plate. Thighbone far-end osteotomy can be conducted on a patientthrough the thighbone far-end fixing plate. A groove is formed in the thighbone far-end fixing plate, thighbone far-end fixing can be conducted on the patient through the groove, and fixing is more convenient. Thighbone near-end connecting at the lower portion of the patient can be conducted through the lower end connecting and fixing plates, the thighbone far-end is prevented from twisting, fixing is more comprehensive, and positioning can be conducted through a positioning plate. The thighbone far-end osteotomy device and the positioning device are simple in structure and convenient to install and can prevent rotation, fixing can be more convenient, and convenience is provided for doctors.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an orthopedic distal femoral osteotomy device and a positioning device thereof. Background technique [0002] As my country fully enters an aging society, there are more and more elderly patients with osteoarthritis over the age of 65. Total knee arthroplasty has become an effective method for the treatment of advanced knee osteoarthritis, which can relieve pain, improve function, and improve quality of life. In knee replacement surgery, osteotomy of the distal femur needs to be performed to find a suitable installation plane of the knee femoral prosthesis, which has strict requirements on the depth and angle of the osteotomy. First, the depth of the distal osteotomy should be appropriate. If the osteotomy is too shallow or too deep, it will lead to asymmetry of the flexion-extension gap; The femoral mechanical axis) is vertical, so that the position and direction of the ...

AI Technical Summary

Problems solved by technology

First, the depth of the distal osteotomy should be appropriate. If the osteotomy is too shallow or too deep, it will lead to asymmetry of the flexion-extension gap; secondly, the osteotomy plane should form a suitable angle with the anatomical axis of the femur, and be aligned with the force line of the lower limbs ( Femoral mechanical axis) is vertical, so that the position and direction of the femoral prosthesis in the knee joint meet the postoperative mechanical requirements, which is the guarantee for the success of knee replacement surgery. The distal femoral osteotomy positioner used in minimally invasive knee Distal osteotomy of the medial condyle without reference to the lateral condyle may lead to excessive osteotomy of the distal femur in cases of severe bone defect of the medial femoral condyle, which may result in insufficient precision of the installation plane of the femoral prosthesis at the knee joint, making it difficult to achieve ideal surgery The effect is not conducive to the rehabilitation of the patient, and they are all positioned by steel nails, which will cause great damage to the patient's bones.

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