Knee joint prosthesis

A knee joint prosthesis and prosthesis technology, applied in the field of artificial knee joints, can solve problems such as knee joint dislocation, column fractures, long rehabilitation training period, etc., to prolong the repair of ligaments, restore knee joint flexion and limit excessive tibial forward movement and the effects of hyperextension, stabilization and traction femoral condyle rollback

Active Publication Date: 2020-12-04
ZHEJIANG CANPHYS MEDICAL TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the postoperative rehabilitation training period is long, and there are often abnormal noises and stuttering sensations during activities. The column-cam mechanism is also prone to related complications, such as knee joint dislocation, column fractures, or severe wear of the column.
[0005] And the knee joint p

Method used

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  • Knee joint prosthesis
  • Knee joint prosthesis
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] The tibial pad 2 is divided into a lower tibial pad 28 and an upper tibial pad 29, and the two ends of a plurality of springs 24 are respectively embedded in the lower tibial pad 28 and the upper tibial pad 29 by molding technology. At the same time, it can not only restore the function of the anterior and posterior cruciate ligaments, but also restore the original elasticity of the tibial pad.

Embodiment 2

[0077] Between the lateral condyle 33 and the tibial pad 2 and between the medial condyle 34 and the tibial pad 2, a connecting portion 4 is arranged, and the movable blocks on the lateral condyle 33 and the medial condyle 34 can be removed, and the first part of the connecting portion 4 can be removed. The block 41 is embedded in the third groove 331. After the first block 41 is placed in the third groove 331, the bolt is turned to fix the movable block on the lateral condyle 33 and the medial condyle 34. Similarly, the The second block 42 is embedded in the fourth groove 23, and the cross section of the first block 41 is circular, so that the knee joint can be slightly rotated through such an arrangement; On the other hand, by rotating the inner tube 432, the connecting frame 434 can be snapped into the tooth lines of different heights of the tooth bar 433, thereby adjusting the distance between the femoral condyle prosthesis 3 and the tibial pad 2, and the second block 42 T...

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Abstract

The invention discloses a knee joint prosthesis. The knee joint prosthesis comprises a tibia support, a tibia pad, a femoral condyle prosthesis, a first fixing coil and a second fixing coil, wherein the tibia support is provided with a first through hole for an anterior cruciate ligament to pass through and a first groove for a posterior cruciate ligament to pass through; the tibia pad is clampedon the top surface of the tibia support, and a second through hole corresponding to the first through hole and a second groove corresponding to the first groove are formed in the tibia pad; the femoral condyle prosthesis can rotate relative to the tibia pad; the first fixing coil is fixedly connected to the lower end surface of the tibia support; and the second fixing coil is fixedly connected toone side of an opening of the first groove. Through the arrangement of the through holes and the grooves, the cruciate ligaments with damaged attachment points can pass through the through holes and the grooves and are respectively fixed through the first fixing coil and the second fixing coil, the initial attachment positions of the ligaments are restored, the repaired ligaments are prolonged, and the somatosensory feeling of the knee joint function is restored.

Description

technical field [0001] The invention relates to the technical field of artificial knee joints, in particular to a knee joint prosthesis. Background technique [0002] At present, the conventional artificial knee arthroplasty is divided into two categories: CR and PS two prosthetic designs. [0003] For CR-TKA, retaining the PCL is more about using its mechanical function, that is, maintaining the stability of the knee joint in the anteroposterior direction, pulling the femoral condyle to complete the "rolling back" movement during knee flexion, and avoiding the femoral condyle and tibial plateau. Restricted knee flexion due to impingement on the rear edge. Because the PCL is the ligament structure of the natural knee joint, which contains the knee joint proprioception, so retaining the PCL can better preserve the knee joint proprioception. However, if the patient's posterior cruciate ligament or anterior cruciate ligament is abnormal, or the amount of tibial osteotomy affe...

Claims

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Application Information

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IPC IPC(8): A61F2/38
CPCA61F2/389A61F2/3886A61F2/3859A61F2002/30528
Inventor 田倩影吴显朱伟强傅彦棉杜永杰王若帆方晓斌徐浩
Owner ZHEJIANG CANPHYS MEDICAL TECH CO LTD
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