Spherical pivot hinge type artificial knee joint prosthesis of rotary platform and use method for spherical pivot hinge type artificial knee joint prosthesis of rotary platform

Abstract

The invention relates to a spherical pivot hinge type artificial knee joint prosthesis of a rotary platform and a use method for the spherical pivot hinge type artificial knee joint prosthesis of therotary platform. The use method comprises the steps: firstly, cutting a distal-end tumor of a thighbone and a proximal-end bone surface of a shinbone, carrying out marrow cavity reaming, connecting athigh bone medullary nail and a thighbone condyle patch together, injecting bone cement into a thigh bone marrow cavity, then, inserting the thigh bone medullary nail into the thigh bone marrow cavity; connecting a shinbone member and a shin bone medullary nail together, injecting bone cement into a shin bone marrow cavity, and then, inserting the shin bone medullary nail into the shin bone marrowcavity; placing a rotary lining into a lining hole of a connecting part, placing a shinbone gasket on a shinbone component, and placing a hinge rotating sphere in a spherical groove of the rotary lining through an insertion splicing hole; and placing the thighbone component on the shinbone gasket, inserting a lining lock into the lining hole of the connecting part, and fixing the thighbone condyle patch onto the thighbone component through a screw. According to the prosthesis, the amount of cut bones can be reduced to the maximum, the sterile loosening rate of the prosthesis can be remarkablylowered, the lifetime of the prosthesis is prolonged, and certain bone storage is reserved for possible reconditioning.

Description

technical field [0001] The invention relates to a ball-axis hinge type artificial knee joint prosthesis with a rotating platform and its use method, which is especially suitable for knee-preserving treatment of giant cell tumor of distal femur, and also suitable for knee-preserving treatment of other benign and malignant tumors of distal femur And revision after failed conventional artificial knee replacement. Background technique [0002] Giant cell tumor (GCT) accounts for 10% to 20% of all primary bone tumors. The high incidence areas are mainly in China, India, Sri Lanka and other countries in Southeast Asia, which are 3 to 4 times that of Europe and the United States. There are also "Asian tumors". Bone Tumor". As a borderline tumor between benign and malignant GCT, surgery is the only effective treatment, which is characterized by a low postoperative distant metastasis rate (1.5% to 7%) and a high local recurrence rate (8% to 62%). ). [0003] Giant cell tumors of b...

AI Technical Summary

Problems solved by technology

Although the failure rate of the third-generation prosthesis has further decreased, there are still some disadvantages, such as biaxial movement and incomplete loading of the femoral condyle, which is different from the normal joint of the human body

The currently used rotary hinge type knee prosthesis is equipped with a flexion axis and a rotation axis respectively for the purpose of flexion, extension and rotation of the knee joint, and the structure is relatively complicated.

The flexion and extension axis of the rotary hinge type knee prosthesis has a polyethylene bushing. Due to the load bearing of the polyethylene bushing, it is prone to wear and tear, which significantly shortens the service life of the prosthesis

Patients may undergo multiple surgeries to replace damaged polyethylene liners, bringing great pain and financial burden to patients

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