Artificial hip joint consisting of multilayer shell core composite structural components

一种复合结构、多层壳的技术，应用在人工股骨头,人工髋关节领域，能够解决机械强度耐磨性稳定性降低、不符合患者、难以提供关节运动等问题，达到减小内衬厚度、广泛骨性支持、有利于稳定性的效果

Active Publication Date: 2013-01-02
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
Comparison scheme
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

An artificial hip joint consisting of multi-layer shell core composite structural components includes an artificial acetabular bone (1) and an artificial femoral head (2) which are mutually matched with each other. The artificial acetabular bone (1) has a multi-layer shell core composite structure and is constituted of a ceramic acetabular bone lining (1-1), transitional layers (1-2, 1-3), an acetabular bone shell made of a porous metal or a porous alloy or a porous toughened ceramic (1-4). The artificial femoral head (2) has a multi-layer shell core composite structure and is constituted of a ceramic spherical shell layer (2-1), a transitional layer (2-5) and a toughened ceramic inner core (2-2). The artificial acetabular bone lining and the artificial femoral head spherical shell layer of the hip joint have high rigid, anti-corrosion and anti-wear performance. The artificial acetabular bone shell layer and the femoral head inner core layer have high tough, shockresistant performance.

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 Patents(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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