Artificial hip joint consisting of multilayer shell core composite structural components

A composite structure, multi-layer shell technology, applied in the field of artificial femoral head and artificial hip joint, can solve problems such as difficulty in providing joint motion, reduced mechanical strength, wear resistance stability, incompatibility with patients, etc. The effect of reduced lining thickness, extensive bony support

Active Publication Date: 2011-01-19
SUZHOU DINGAN ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the fracture toughness of composite ceramics has been significantly improved, compared with high-purity alumina, the mechanical strength (hardness), wear resistance and phase stability are reduced, and it is difficult to provide long-lasting and stable joint motion in the body.
There is still a long way to go for the existing artificial hip joint to be used for life, which is far from meeting the long-cherished wish of the majority of patients

Method used

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  • Artificial hip joint consisting of multilayer shell core composite structural components
  • Artificial hip joint consisting of multilayer shell core composite structural components
  • Artificial hip joint consisting of multilayer shell core composite structural components

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A multi-layer shell-core composite structure artificial acetabular in the artificial hip joint composed of multi-layer shell-core composite structural parts, which is composed of high-purity ultra-fine alumina ceramic acetabular lining 1-1, alumina base (25vol% niobium) The metal-ceramic transition layer 1-2, the alumina-based (65vol% niobium) metal-ceramic transition layer 1-3 and the niobium porous metal acetabular shell layer 1-4 are composed of four parts, and the surface of the acetabular shell layer 1-4 is provided with Multi-start spiral relief (see image 3 ) or multi-head spiral dimples (see Figure 4 ) in two forms, which can be selected according to the requirements of use. The purity of the high-purity superfine aluminum oxide powder is greater than 99.9 wt%, and the particle size is 0.5-10 μm; the purity of the niobium metal powder is greater than 99.8 wt%, and the particle size is 0.5-20 μm. The high-purity ultrafine alumina ceramic acetabular lining lay...

Embodiment 2

[0032] A multi-layer shell-core composite structure artificial acetabular in the artificial hip joint composed of multi-layer shell-core composite structural parts, which is composed of high-purity ultra-fine alumina ceramic acetabular lining 1-1, Ti6Al4V-60vol.%Al 2 o 3 Transition layer 1-2, Ti6Al4V-20vol.%Al 2 o 3 The transition layer 1-3 and the Ti6Al4V acetabular shell layer 1-4 are composed of four parts, and the surface of the acetabular shell layer 1-4 is provided with multi-headed spiral ribs ( Figure 5 ) or multi-head spiral grooves ( Figure 6 ) in two forms, which can be selected according to the requirements of use. The purity of the high-purity superfine alumina powder is greater than 99.9 wt%, and the particle size is 0.5-10 μm; the purity of the Ti6Al4V powder is greater than 99.0 wt%, and the particle size is 5-25 μm. The high-purity ultrafine alumina ceramic acetabular lining 1-1 and Ti6Al4V-60vol.%Al 2 o 3 Transition layer 1-2, Ti6Al4V-20vol.%Al 2 o ...

Embodiment 3

[0034] A multi-layer shell-core composite structure artificial femoral head in an artificial hip joint composed of multi-layer shell-core composite structural parts, which is made of high-purity ultrafine alumina ceramic spherical shell layer 2-1, ZrO 2 (3Y 2 o 3 )-80wt.%Al 2 o 3 Toughened ceramic transition layer 2-5 and ZrO 2 (3Y 2 o 3 )-20wt.%Al 2 o 3 The toughened ceramic inner core consists of 2-2 three parts. The purity of high-purity ultra-fine alumina powder is greater than 99.9wt%, and the particle size is 0.5-10 μm; ZrO 2 The purity of the powder is greater than 99.8 wt%, and the particle size is 0.5-10 μm. The high-purity ultrafine alumina ceramic spherical shell layer 2-1, ZrO 2 (3Y 2 o 3 )-80wt.%Al 2 o 3 Toughened ceramic transition layer 2-5 and ZrO 2 (3Y 2 o 3 )-20wt.%Al 2 o 3 The toughened ceramic inner core 2-2 is injected layer by layer into one by multi-material powder co-injection technology. The specific multi-layer shell core structure ...

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Abstract

The invention discloses an artificial hip joint consisting of multilayer shell core composite structural components. The artificial hip joint comprises an artificial acetabulum and an artificial thigh bone. The artificial hip joint is characterized in that: the artificial acetabulum has a multilayer shell core composite structure and consists of a ceramic acetabulum lining, a transition layer, a porous metal, a porous alloy or a porous toughened ceramic acetabulum shell; the artificial thigh bone has a multilayer shell core composite structure and consists of a ceramic spherical shell layer, a transition layer and a toughened ceramic inner core. The ceramic acetabulum lining and the spherical shell layer of the artificial thigh bone have high hardness, corrosion resistance and abrasion resistance; the artificial acetabulum shell layer and the inner core of the thigh bone have high toughness and impact resistance; and the transition layers are made of gradient composite materials between the materials for the shell layer and the inner core layer, and have the functions of increasing the bonding strength between the shell layer and the inner core layer, reducing the interface stressbetween the shell layer and the inner core layer and the like. The artificial hip joint has the characteristics of long service life, high reliability, high performance and the like.

Description

technical field [0001] The invention belongs to the field of medical artificial limbs, and relates to an artificial hip joint, in particular to an artificial hip joint comprising two components: an artificial acetabulum with a multilayer shell-core composite structure and an artificial femoral head with a multilayer shell-core composite structure. Background technique [0002] Artificial hip replacement has become the most effective way to treat hip trauma, aging, inflammation and disease, relieve pain, restore mobility and improve quality of life. The movable function of the artificial hip joint is realized through the sliding between the artificial acetabulum and the artificial femoral head. [0003] The existing artificial acetabulum mainly includes two structures of combined type and integral type. The combined artificial acetabular is mainly composed of a metal cup (acetabular outer lining) and an ultra-high molecular weight polyethylene lining or a ceramic lining. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/32A61F2/34A61F2/36A61L27/40
CPCA61F2002/30011A61F2/34A61F2002/30971A61F2/3609A61F2310/00011A61F2310/00389A61F2310/00179A61F2002/3092A61F2310/00023A61F2310/00029A61F2310/00041A61F2310/00047A61F2310/00053A61F2310/00059A61F2310/00089A61F2310/00095A61F2310/00101A61F2310/00131A61F2310/00203A61F2310/00239A61F2310/00269A61F2310/00281A61F2310/00287A61F2310/00299A61F2310/00317A61F2/30771A61F2/3094A61F2/3603A61F2002/30449A61F2002/30968A61F2002/3401A61F2002/3448
Inventor 李亚东李亚军
Owner SUZHOU DINGAN ELECTRONICS TECH
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