Double-acting type artificial knee joint prosthesis

A technology for artificial knee joints and prostheses, applied in knee joints, prostheses, elbow joints, etc., can solve problems such as uneven stress distribution, bone loss, prosthesis loosening, etc. Effects of uneven stress distribution, expanded indications and applicable populations

Active Publication Date: 2014-02-12
BEIJING LIDAKANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The medullary pin of this knee joint prosthesis exerts uneven stress distribution on the femur and tibia during knee joint movement. Stress concentration will lead to early loosening of the prosthesis

Method used

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  • Double-acting type artificial knee joint prosthesis
  • Double-acting type artificial knee joint prosthesis
  • Double-acting type artificial knee joint prosthesis

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Embodiment Construction

[0032] Such as Figure 1-Figure 3 It is the double-action type artificial knee joint prosthesis of the present invention.

[0033] The double-moving artificial knee prosthesis provided by the present invention comprises a femoral prosthesis 1, a tibial prosthesis 2, and a three-way retainer 3 connecting the femoral prosthesis and the tibial prosthesis;

[0034] Such as Figure 4-Figure 6 As shown, the femoral prosthesis 1 is composed of a rod-shaped femoral stem or a femoral pin and a femoral prosthesis connecting part connected with a three-way retainer; the femoral prosthesis connecting part is formed on the side of the femoral prosthesis near the knee a shaft sleeve 14 with a hollow cylindrical hole;

[0035] Such as Figure 12 As shown, the tibial prosthesis 2 is composed of a rod-shaped tibial stem or a tibial pin and a tibial prosthesis connection part connected with a three-way retainer; the tibial prosthesis connection part includes a spherical cup 6 and a double-ac...

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Abstract

The invention discloses a double-acting type artificial knee joint prosthesis comprising a femur prosthesis, a tibia prosthesis and a three-way fixing piece, wherein the three-way fixing piece comprises a cylindrical shaft and a three-way shaft sleeve; the three-way shaft sleeve comprises a cylindrical sleeve and a supporting column, the cylindrical sleeve is sleeved on the cylindrical shaft, one end of the supporting column is fixedly arranged at the middle point of the cylindrical sleeve, the supporting column is vertical to the axis of the cylindrical sleeve, and one end, far away the cylindrical sleeve, of the supporting column forms a spherical bulge; a connection part of the femur prosthesis and the three-way fixing piece forms double lugs to cover the outer side of the cylindrical sleeve, and the double lugs are respectively fixedly connected with the cylindrical shaft; a connection part of the tibia prosthesis and the three-way fixing piece forms a spherical cup; a double-acting liner is arranged in the spherical cup, and the spherical bulge is fixed in the double-acting liner. According to the double-acting type artificial knee joint prosthesis disclosed by the invention, when the rebuilding of a knee joint is realized, the disadvantages that the stress of a rotary hinge type knee joint on the femur and the tibia is larger, and the motion degree of the knee joint is limited are overcome, the service life of the prosthesis is prolonged, and the adaption diseases and the applicable crowd of an artificial knee joint replacement are increased.

Description

technical field [0001] The invention relates to a double-action artificial knee joint prosthesis. Background technique [0002] At present, the traditional rotary hinge artificial knee joint is widely used in artificial knee joint reconstruction with a large number of bone defects and complex artificial knee joint revision surgery. The medullary pin of this knee joint prosthesis exerts uneven stress distribution on the femur and tibia during knee joint movement. Stress concentration will lead to early loosening of the prosthesis, and stress shielding will lead to bone loss and fracture. In severe cases, artificial knee needs to be performed again Joint revision surgery, allograft or autologous bone reconstruction, or even amputation. Especially in children and adolescents, the prosthesis is more likely to loosen prematurely due to the large amount of knee joint activity and further bone growth. Contents of the invention [0003] The object of the present invention is a d...

Claims

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Application Information

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IPC IPC(8): A61F2/38
CPCA61F2/38A61F2002/30001
Inventor 郭卫
Owner BEIJING LIDAKANG TECH
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