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

Assembled distal femur tumour type bionic prosthesis containing universal assembly

A modular, femoral technology, applied in the field of medical equipment, can solve the problems of aggravating the fracture or wear of the host bone, the mismatch of the elastic modulus of the bone, and the failure of the prosthesis, so as to reduce the risk of bone loss and avoid stress shielding. effect, the effect of reducing secondary fractures

Pending Publication Date: 2021-09-24
PEOPLES HOSPITAL PEKING UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1) The current hinged knee joint does not match the motion behavior of the normal knee joint of the human body, and the multi-directional force causes the life of the prosthesis to be shortened; 2) The CoCrMo alloy does not match the elastic modulus of the bone, and stress shielding is prone to occur after implantation. While accelerating the loss of bone mass, the risk of secondary fractures will also increase; 3) The density of CoCrMo alloy is too high, which will increase the burden on the host bone after implantation, causing fracture or wear, resulting in failure of the prosthesis; 5) CoCrMo alloy materials will produce severe scattering and metal artifacts when exposed to radiation

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
  • Assembled distal femur tumour type bionic prosthesis containing universal assembly
  • Assembled distal femur tumour type bionic prosthesis containing universal assembly
  • Assembled distal femur tumour type bionic prosthesis containing universal assembly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The degree of polymerization of PEEK in the CFR-PEEK used in this embodiment is 105, the number average molecular weight is 34,000, the weight average molecular weight is 100,000, and the molecular weight distribution is 3.2-3.8, wherein the content of carbon fiber is 30wt%. The mechanical properties and densities are shown in Table 1.

Embodiment 2～6

[0052] The difference between Examples 2-6 and Example 1 lies in that the content of carbon fibers is different, and the specific test results are shown in Table 1.

[0053] Table 1 shows the effect of different carbon fiber contents on the mechanical properties and density of PEEK

[0054]

[0055] It can be seen from Table 1 that as the proportion of carbon fiber increases gradually, the elastic modulus and tensile strength of the prosthesis also gradually increase, and the stiffness gradually increases, but the toughness gradually decreases. When the carbon fiber content reaches 60%, the material has no plastic function at all and is very hard. This material is not suitable for making joint prostheses. Therefore, after continuous attempts, it was finally determined that the mechanical properties of 30wt% CFR-PEEK material are the most suitable for knee prosthesis, which takes into account both rigidity and toughness. In addition, the carbon fibers in the present inventi...

Embodiment 7

[0057] This embodiment is the same as Embodiment 3, wherein the content of carbon fiber is 30wt%, the degree of polymerization of PEEK is 105, the number average molecular weight is 34,000, the weight average molecular weight is 100,000, and the molecular weight distribution is 3.2-3.8.

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 assembled distal femur tumour type bionic prosthesis containing a universal assembly, which comprises the following components: a femur assembly, a tibia assembly, a buffering assembly and a universal assembly; the femur assembly comprises a distal femur; the lower end of the distal femur is provided with a first groove and two through holes located at the two ends of the first groove; the tibia assembly comprises a tibia platform; a second groove is formed in the tibia platform; the buffering assembly comprises a liner; the liner is arranged at the upper end of the tibia platform; the universal assembly comprises a universal shaft and a pin shaft; the upper end of the universal shaft is installed in the first groove; the lower end of the universal shaft is installed in the second groove; and the pin shaft is arranged between the two through holes in a penetrating mode and used for connecting the distal femur and the tibia platform together. According to the invention, the integrated universal assembly is added into the distal femur tumour type prosthesis; stress borne by the prosthesis is effectively dispersed; and the service life of the prosthesis is prolonged.

Description

technical field [0001] The invention relates to a modular distal femur tumor-type bionic prosthesis containing a universal component, which belongs to the technical field of medical equipment. Background technique [0002] The distal femur is a common site for malignant bone tumors. The current method of treating malignant bone tumors in this area is mainly to resect the tumor segment, remove the tumor completely, and then use artificial hinged knee joint prosthesis to reconstruct the defective bone. [0003] There are two major disadvantages in the currently commercially available distal femur tumor-type hinge knee joints: [0004] 1. From the design point of view: Currently, there are only two types of tumor-type distal femoral prosthesis on the market: simple hinge and rotary hinge. These two simple structural designs have greatly restricted the movement of the knee prosthesis in all directions, which is very different from the normal knee joint activities (flexion, ext...

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): A61F2/38A61L27/08A61L27/18A61L27/50
CPCA61F2/3859A61F2/389A61L27/18A61L27/08A61L27/50A61F2002/2825A61F2002/2892A61F2002/30329A61L2430/02C08L61/16
Inventor 郭卫郭煜
Owner PEOPLES HOSPITAL PEKING UNIV
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