Tumor type knee joint prosthesis containing CFR-PEEK material

Abstract

The invention discloses a tumor type knee joint prosthesis containing a CFR-PEEK material. The tumor type knee joint prosthesis is characterized by comprising a femoral component and a tibial component, wherein the femoral component comprises a distal femoral prosthesis made of the CFR-PEEK material; the tibial component comprises a tibial plateau prosthesis and a liner, the tibial plateau prosthesis is connected with the distal femoral prosthesis, the liner is arranged at the near end of the tibial plateau prosthesis and used for bearing the distal femoral prosthesis, the tibial plateau prosthesis is made of a CoCrMo alloy material, and the liner is made of a PE material. The tumor type knee joint prosthesis has the advantages of good mechanical property, light weight, good light transmission and the like, and the defects of an existing tumor type knee joint prosthesis are overcome.

Description

technical field [0001] The invention relates to a tumor type knee joint prosthesis containing CFR-PEEK (carbon fiber reinforced polyetheretherketone) material, which belongs to the field of medical devices. Background technique [0002] The distal femur and proximal tibia are the most common sites for malignant bone tumors. The current method for treating malignant bone tumors in this area is mainly to cut the bone according to the surgical margin (generally 3 cm from the tumor margin), remove the tumor completely, and then reconstruct it with a tumor-type artificial knee joint prosthesis. [0003] Currently, commercially available tumor joint materials are mainly composed of cobalt chromium molybdenum (CoCrMo) alloy and polyethylene (PE). These two materials have excellent wear resistance and mechanical strength, and patients can obtain immediate joint stabilization after implantation. However, as an implant prosthesis used in the bone tumor department, it still has some ...

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Problems solved by technology

However, as an implant prosthesis used in the bone tumor department, it still has some shortcomings. First, the density of the CoCrMo alloy is too large (8.9g / cm 3 ), the weight of the prepared prosthesis is too large, which will accelerate the load on the surrounding bone, which may cause fracture and wear; secondly, the metal particles produced by the CoCrMo alloy during the wear process will cause inflammation in the surrounding tissue; in addition, as Metal materials, like CoCrMo alloy and medical titanium alloy (Ti6Al4V), will scatter when the radiation is irradiated on its surface, resulting in metal artifacts. On the one hand, this artifact affects doctors’ observation during CT or MR examinations. On the one hand, it will affect the radiation dose estimation during tumor radiotherapy. In addition, the scattered rays will also damage the surrounding normal tissues.

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