Unlock instant, AI-driven research and patent intelligence for your innovation.

Degradable porous magnesium alloy patella stent and preparation method thereof

A magnesium alloy and porous magnesium technology, applied in the field of biomedical tissue engineering, can solve the problems of inapplicable patella surface prosthesis, etc., achieve the effect of reducing structural weight and inducing natural growth and regeneration

Inactive Publication Date: 2018-12-07
SHENZHEN INST OF ADVANCED TECH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, severe patellar tissue defects are also not suitable for patellar surface prosthesis replacement

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
  • Degradable porous magnesium alloy patella stent and preparation method thereof
  • Degradable porous magnesium alloy patella stent and preparation method thereof
  • Degradable porous magnesium alloy patella stent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) Use micro CT to scan the patella sample to collect three-dimensional data, import the obtained CT data (STL format) into Mimics software, perform Boolean operations, and construct a three-dimensional model of the patellar bracket with cancellous bone microstructure, and then export the patellar The STL format file of the bracket entity is ready for processing, and the three-dimensional molding mold and firing mold of the patella bracket are prepared based on this;

[0053] (2) Prepare the raw materials according to the ratio of Mg 93%, Al 7%, mix the atomized metal powder of Mg and Al with a particle size of 90-100 μm according to the formula amount, carry out ball milling under an argon atmosphere, and obtain the mixed powder after drying powder;

[0054] (3) Put the mixed powder obtained in step (2) into the molding mold obtained in step (1) for compaction, then put it into the firing mold, place it in a high-temperature sintering furnace, and heat it up to 600°C ...

Embodiment 2

[0056] (1) Use micro CT to scan the patella sample to obtain its three-dimensional data, as shown in Figure 1(a), Figure 1(b), and Figure 1(c); import the obtained CT data (STL format) into Mimics software , perform Boolean operations to construct a three-dimensional model of the patellar support with cancellous bone microstructure, such as figure 2 shown;

[0057] (2) adopting the component distribution ratio of the magnesium alloy whose trade mark is AZ91D, mixing the atomized metal powders of each component of the magnesium alloy with a particle size of 65-75 μm according to the formula amount to obtain the magnesium alloy mixture;

[0058] (3) Import the CAD data of the three-dimensional model of the patella support in step (1) into the rapid prototyping machine, and control the number of high-energy electron beam spots to 60 under the condition of vacuum degree image 3 shown.

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

PropertyMeasurementUnit
Hole diameteraaaaaaaaaa
Particle sizeaaaaaaaaaa
Sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a degradable porous magnesium alloy patella stent and a preparation method thereof. The patella stent has a porous structure, the pore diameter of which is 220-320 mu m and the porosity of which is 45-55%. The patella stent is made from a magnesium alloy. By scanning the patella micro-structure, scanning data are reconstructed three-dimensionally, and the patella stent with like cancellous bone pore structure is prepared by means of a powder metallurgic method or a rapid prototyping method. The patella stent is more excellent in performance than metal and high molecular material artificial patella, has the advantages of good mechanical characteristics, degradability in vivo, good biocompatibility and biological durability and the like, and is suitable for being popularized in the medical field.

Description

technical field [0001] The invention relates to the field of biomedical tissue engineering, in particular to a degradable porous magnesium alloy patella support and a preparation method thereof. Background technique [0002] Patella softening, also known as chondromalacia patella and chondritis patella, is the degeneration of the articular cartilage of the patella caused by damage, including swelling, fragmentation, shedding and corrosion of the cartilage surface of the patella. The same changes occur in the corresponding parts of the femoral condyle and the patella, forming osteoarthritis of the patellofemoral joint. Patella softening tends to occur in younger adults, but there are also many middle-aged and elderly people. According to statistics, the prevalence rate of patella patella in my country is 36.2%, and the incidence rate of women aged 30-40 is as high as 50%. Patella softening is one of the common causes of anterior knee pain, which affects the patient's life a...

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): A61L27/56A61L27/50A61L27/04B22F3/11B33Y10/00B33Y80/00
CPCA61L27/047A61L27/50A61L27/56A61L2430/02B22F3/11B33Y10/00B33Y80/00
Inventor 尚鹏刘嘉张琴丽侯增涛杨朝岚徐大众徐榕
Owner SHENZHEN INST OF ADVANCED TECH