Artificial total knee joint prosthesis

A technology of total knee joints and prostheses, applied in the direction of knee joints, prostheses, elbow joints, etc., can solve problems that affect MRI formation, easily induce inflammatory reactions, and body toxicity, so as to reduce the incidence rate and improve biophase Capacitive, good biological performance effect

Inactive Publication Date: 2016-05-25
TONGJI HOSPITAL ATTACHED TO TONGJI MEDICAL COLLEGE HUAZHONG SCI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the artificial knee joint prosthesis in the prior art is easy to induce inflammatory reaction, osteolysis and lead to loosening of the prosthesis due to easy wear and tear, and it will cause stress shielding problems and has certain toxicity to the body. And affect the above-mentioned defects of NMR forming, provide a high wear resistance, good biocompatibility and good cushioning performance, can better simulate the biological performance of normal knee joints, improve the patient's subjective experience, prolong the Artificial total knee prosthesis with long service life and reduced revision rate

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0038] An artificial total knee prosthesis, the artificial total knee prosthesis is a cruciate ligament-retaining prosthesis, that is, a CR prosthesis, such as figure 1 and figure 2 As shown, it includes femoral condyle 1, liner 2 and tibial tray 3 connected in sequence, and the upper surface of the liner 2 forms a sliding fit with the femoral condyle 1, while the lower surface of the liner 2 cooperates with the tibial tray 3, the The contact surface between the liner 2 and the tibial tray 3 is a smooth surface.

[0039] The above-mentioned femoral condyle 1, liner 2 and tibial tray 3 are all made of polyetheretherketone or its derivatives. The derivatives of polyetheretherketone can be carbon fiber reinforced polyetheretherketone, glass fiber reinforced polyetheretherketone, etc. .

[0040] The value range of the modulus of elasticity of the above-mentioned femoral condyle 1 is 10GPa~25GPa; image 3 and Figure 4 As shown, the lower surface and the upper surface of the f...

Embodiment 2

[0046] An artificial total knee prosthesis, which is a post-stabilized prosthesis, i.e. a PS-type prosthesis, adopts a fixed platform design, including a femoral condyle 1, a liner 2 and a tibial support 3 connected in sequence, And if Figure 7 and Figure 8 As shown, the upper surface of the liner 2 forms a sliding fit with the femoral condyle, while the lower surface of the liner cooperates with the tibial tray, and the contact surface between the liner 2 and the tibial tray 3 is a smooth surface.

[0047] The above-mentioned femoral condyle 1, liner 2 and tibial tray 3 are all made of polyetheretherketone or its derivatives (such as carbon fiber reinforced polyetheretherketone, glass fiber reinforced polyetheretherketone, etc.).

[0048] The value range of the modulus of elasticity of the above-mentioned femoral condyle 1 is 10GPa~25GPa; Figure 9 and Figure 10 As shown, the lower surface and the upper surface of the femoral condyle 1 are respectively provided with a p...

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Abstract

The invention discloses an artificial total knee joint prosthesis. The artificial total knee joint prosthesis comprises a femoral condyle, a spacer and a tibia holder connected in sequence, the upper surface of the spacer is in slide fit with the femoral condyle, and the lower surface of the spacer fits with the tibia holder; all of the femoral condyle, the spacer and the tibia holder are made of polyetheretherketone or derivatives thereof. The artificial total knee joint prosthesis has high abrasion resistance, good biocompatibility and good cushion performance, biological properties of normal knee joints can be better stimulated, and subjective feeling of patients can be further improved; besides, the artificial total knee joint prosthesis is long in service life and low in revision rate, metal ion toxicity and anaphylaxis cannot be caused, and perspective development and magnetic resonance imaging are unaffected.

Description

technical field [0001] The invention relates to the field of medical rehabilitation equipment, in particular to an artificial total knee joint prosthesis. Background technique [0002] The knee joint is the largest joint in the human body with the most complex structure and more chances of injury. Joint replacement is currently a common method to improve knee joint function, which can relieve joint pain, correct joint deformities, and restore joint mobility. The commonly used material for artificial knee prosthesis is the CoCrMo alloy / UHMWPE friction interface. This interface has good friction performance and ultra-high molecular weight polyethylene provides a certain cushioning performance, but the particles produced by the wear of polyethylene after long-term use It can induce inflammatory response, induce osteolysis and lead to loosening of the prosthesis; secondly, the CoCrMo alloy has a large elastic modulus, which will cause stress shielding problems; thirdly, the CoC...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/38
CPCA61F2/3877A61F2/3859A61F2/389A61F2002/30003A61F2002/3006A61F2002/30317A61F2002/30528A61F2002/30632
Inventor 肖骏靳忠民朱元莉黄登峰朱皓
Owner TONGJI HOSPITAL ATTACHED TO TONGJI MEDICAL COLLEGE HUAZHONG SCI TECH
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