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

Femoral stem prosthesis

A femoral stem and stem body technology, applied in the direction of the femoral head, femoral shaft, hip joint, etc., can solve the problems of limited load on the proximal lateral femur and limited improvement effect, so as to improve aseptic loosening, avoid bone resorption, The effect of promoting bone ingrowth

Active Publication Date: 2021-07-09
BEIHANG UNIV
View PDF10 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the study found that the above design can reduce the stress shielding of the proximal medial femur to a certain extent, since the femoral stem and the femur are not connected as a whole, when the femoral stem contracts inwardly under the action of bending load in the body, the stress transmitted to the proximal lateral femur limited load
Therefore, the above design has a limited effect on improving the stress shielding of the proximal lateral femur.

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
  • Femoral stem prosthesis
  • Femoral stem prosthesis
  • Femoral stem prosthesis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0033] The invention provides a femoral stem prosthesis, such as Figure 1-6 As shown, a handle body 1 is included, a notch 10 is provided on the outside of the handle body 1 , and an auxetic structure 2 is provided in the notch 10 .

[0034] It should be noted that the position reference here is based on the human body after the femoral stem prosthesis is implanted into the human body, and the inner side refers to the side where the femoral neck 11 and the ball joint 12 on the handle body 1 Figure 1-2 The right side in the shown embodiment), the outside refers to the side of the handle body 1 away from the femoral neck 11 and the ball joint 12 (ie Figure 1-2 left in the example shown).

[0035] Auxetic structural materials belong to the category of ...

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 discloses a femoral stem prosthesis, and belongs to the technical field of orthopedic implants. The femoral stem prosthesis comprises a stem body, the outer side of the stem body is provided with a notch, an auxetic structure is arranged in the notch. Stress shielding on the inner side and the outer side of the proximal femur can be well reduced, bone resorption of the proximal femur is avoided, and the problem of aseptic loosening of the femoral stem caused by stress shielding after total hip replacement is solved. In addition, the auxetic structure is also a porous structure, pores communicated each other in the auxetic structure are beneficial to transportation of nutrient substances and metabolites, so that bone ingrowth can be promoted, and the medium and long-term stability of the prosthesis is further improved.

Description

technical field [0001] The invention relates to the technical field of orthopedic implants, in particular to a femoral stem prosthesis. Background technique [0002] Total hip arthroplasty is an effective means of treating severe hip joint diseases. It replaces diseased or deformed hip joints by implanting artificial femoral stems and artificial acetabular cups, so as to reduce pain, restore function and correct deformity. In 2015 alone, the annual replacement volume of artificial hip joints in China reached 400,000 units, and this number is still growing at a rate of 25%-30% per year. The demand for high-performance hip prostheses is increasing clinically due to the increase in patient life expectancy and the need for complex load-bearing conditions and range of motion. [0003] The most common failure mode of hip prosthesis is aseptic loosening of the femoral stem, and stress shielding is the main mechanical factor for aseptic loosening. After the femoral stem is implant...

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
Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/36
CPCA61F2/3662A61F2/3672
Inventor 刘博伦郑诚功
Owner BEIHANG 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