Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Artificial knee joint prosthesis

A technology of artificial knee joints and prostheses, applied in the direction of knee joints, prostheses, elbow joints, etc., can solve the problems of unreproducible, short life of prosthesis, and dissatisfied patients with postoperative functions, so as to achieve unsatisfactory functions and use long life effect

Inactive Publication Date: 2016-11-16
XIAN HONGHUI HOSPITAL
View PDF10 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem that the existing knee joint prosthesis cannot reproduce the physiological and kinematic characteristics of "the medial condyle shifts and the lateral condyle rolls back", which causes patients to be dissatisfied with the postoperative function or the survival life of the prosthesis is too short

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Artificial knee joint prosthesis
  • Artificial knee joint prosthesis
  • Artificial knee joint prosthesis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This embodiment provides an artificial knee joint prosthesis, combined with figure 1 As shown, it includes a femoral prosthesis 1 and a tibial prosthesis 2. The upper end of the tibial prosthesis 2 is provided with a tibial metal bracket 3, and the lower end of the femoral prosthesis 1 is associated with the tibial metal bracket 3 to form a joint.

[0025] The artificial knee joint prosthesis provided in this embodiment mainly realizes the physiological kinematics of "the medial condyle pivots and the lateral condyle rolls back" through the movement of the femoral prosthesis 1 in the tibial metal bracket 3. In addition to the flexion and extension activities between the femoral prosthesis 1 and the tibial prosthesis 2, it can also be accompanied by the physiological forward and backward sliding and internal and external rotation of the femoral articular surface on the tibial articular surface, providing patients with more natural knee joint function.

Embodiment 2

[0027] This embodiment further describes the structure between the femoral prosthesis 1 and the tibial prosthesis 2, from figure 1 It can be seen that the lower end of the femoral prosthesis 1 is provided with a medial condyle 4 and a lateral condyle 5 of a spherical structure, and the medial condyle 4 and the lateral condyle 5 form joints with the tibial metal tray 3 in a spherically associated manner.

[0028] The inner polyethylene liner 6 and the outer polyethylene liner 7 are respectively installed on the tibial metal bracket 3, and the medial condyle 4 and the lateral condyle 5 at the lower end of the femoral prosthesis 1 pass through the inner polyethylene liner 6 and the outer polyethylene liner 7 respectively. Installed on the tibial metal support 3.

[0029] Such as image 3 As shown, the upper surface of the inner polyethylene liner 6 is concave spherical, and is associated with the spherical surface of the medial femoral condyle 4 to form a ball-and-socket joint, ...

Embodiment 3

[0032] This implementation is further described on the basis of Embodiment 2. In this embodiment, in order to better realize the function, the upper surface of the inner polyethylene liner 6 is spherical, and is associated with the medial femoral condyle 4 to form a joint. The relationship between the polyethylene liner 6 and the radius of the medial femoral condyle 4 is divided into a fully restricted type and a semi-restricted type.

[0033] Completely restrictive type: that is, the spherical radius of the upper surface of the medial polyethylene liner 6 = the radius of the medial femoral condyle. In this type, the medial polyethylene liner 6 and the medial femoral condyle 4 are completely fitted and mutually restricted, and no deviation will occur , of course, can precisely satisfy the various functions of the knee joint.

[0034] Semi-restricted type: that is, the spherical radius of the upper surface of the inner polyethylene liner 6 is greater than the radius of the medi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to an artificial knee joint prosthesis. According to the artificial knee joint prosthesis, the concave surface of the femur prosthesis provides a mounting interface with the distal femur, and the convex surface of the femur prosthesis is connected with polyethylene to form the joint; the inner side of the tibia prosthesis provides a locking mechanism for fixing a polyethylene gasket on the inner side, the outer side of the tibia prosthesis adopts the design of a movable platform, and a high-polished surface is adopted, so that a polyethylene gasket on the outer side slides thereon; the upper surface of the polyethylene gasket on the inner side is in hypotaxis with the femur internal condyle, so that a cup-and-ball joint with large volume is formed, the inner-side axial and partial front and back sliding activity is provided, and the lower surface of the polyethylene gasket on the inner side and the inner side of the tibia prosthesis form a locking mechanism; the upper surface of the polyethylene gasket on the outer side forms a cup-and-ball joint with the femur external condyle, complete hypotaxis is formed, the lower surface is movable, through the synergistic effect of tibia metal supports, the several parts realize the physiological kinesiology of ' the internal condyle makes axial movement, and the external condyle rolls backwards' of the femur, so that a patient with the mounted knee joint prosthesis can realize the purpose that the internal condyle makes axial movement, and the external condyle rolls backwards of the femur articular surface on the tibia articular surface in the bending and stretching moving processes, and thus the postoperative functions are improved.

Description

technical field [0001] The invention belongs to the technical field of medical equipment, and in particular relates to an artificial knee joint prosthesis, which reproduces the physiological kinematics of "the medial condyle shifts and the lateral condyle rolls back" of the femur. Background technique [0002] The principle of artificial knee replacement is to use an artificial material interface to replace the worn or damaged surface of the diseased knee joint, so as to obtain a painless and movable knee joint, relieve pain and improve function for patients, but the existing artificial knee joint prosthesis Failure to restore normal knee kinematics. [0003] The normal knee joint is accompanied by forward and backward sliding and internal and external rotation of the femoral articular surface on the tibial articular surface during flexion and extension activities. However, the existing knee prosthesis only focuses on the range of flexion and extension, and the knee prosthe...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): A61F2/38
CPCA61F2/3854A61F2/3859A61F2/3877A61F2/389A61F2002/3006A61F2002/30476A61F2002/30649A61F2002/3065A61F2002/30654A61F2310/00023A61F2310/00029
Inventor 马建兵李辉张奇达张维杰陈信林
Owner XIAN HONGHUI HOSPITAL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com