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Artificial hip joint with joint head and mortar cup surface coated by carbon/TiC nanometer multilayer compound film

A nano-multilayer, composite membrane technology, applied in the field of artificial hip joints, to achieve the effect of improving the interface bonding force, chemical inertia and corrosion resistance, and improving the interface bonding force and load bearing capacity

Inactive Publication Date: 2008-07-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a joint head and an acetabular cup for the problems that the artificial joint prosthesis is restricted in long-term survival by the wear of the joint head-acetabular cup interface and the osteolysis induced by wear debris, aseptic loosening of joints, etc. Artificial hip joint coated with carbon / TiC nano-multilayer composite film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A closed-field unbalanced magnetron sputtering apparatus was used to sputter deposited nano-multilayer composite films on the surface of the alloy joint head and the surface of the alloy mortar cup. A high-purity graphite target and a metal Ti target were co-sputtered to prepare a thin film on four perpendicular to the horizontal and 90 degrees to each other. The first and fourth targets were graphite targets, the second target was the Ti target, and the third target was not working. The turret table on which the alloy joint head or alloy mortar cup test piece is placed rotates in a single axis around the vertical center, and the rotation speed of the turret table is controlled to 1 rpm. The specimen tilts and swings and rotates at the same time. The distance between the specimen and the target is about 15 cm. Before coating, pre-evacuate to 3.0×10 -4 Pa, then argon with a purity of 99.99% was introduced, and the argon flow rate was controlled at 25 sccm. First, clean the t...

Embodiment 2

[0019] A closed-field unbalanced magnetron sputtering apparatus was used to sputter deposited nano-multilayer composite films on the surface of the alloy joint head and the surface of the alloy mortar cup. A high-purity graphite target and a metal Ti target were co-sputtered to prepare a thin film on four perpendicular to the horizontal and 90 degrees to each other. The first and fourth targets were graphite targets, the second target was the Ti target, and the third target was not working. The turret table on which the alloy joint head or alloy mortar cup test piece is placed rotates in a single axis around the vertical center, and the rotation speed of the turret table is controlled at 2 rpm. The specimen tilts and swings and rotates at the same time. The distance between the specimen and the target is about 15 cm. Before coating, pre-evacuate to 3.0×10 -4 Pa, then argon with a purity of 99.99% was introduced, and the argon flow rate was controlled at 25 sccm. First, use 0.4A ta...

Embodiment 3

[0022]A closed-field unbalanced magnetron sputtering apparatus was used to sputter deposited nano-multilayer composite films on the surface of the alloy joint head and the surface of the alloy mortar cup. A high-purity graphite target and a metal Ti target were co-sputtered to prepare a thin film on four perpendicular to the horizontal and 90 degrees to each other. The first and fourth targets were graphite targets, the second target was the Ti target, and the third target was not working. The turret table on which the alloy joint head or alloy mortar cup specimen is placed rotates in a single axis around the vertical center, and the rotation speed of the turret table is controlled to 3rpm. The specimen tilts and swings and rotates at the same time. The distance between the specimen and the target is about 15 cm. Before coating, pre-evacuate to 3.0×10 -4 Pa, then argon with a purity of 99.99% was introduced, and the argon flow rate was controlled at 25 sccm. First, clean the targe...

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Abstract

The invention discloses an artificial hip joint which plates carbon / TiC nanometer multiple layers of composite membranes on a joint head and the surface of an acetabular cup, the alloy joint head and the surface of the acetabular cup are plated with the multiple layers of the composite membranes which are composed of carbon membranes with the single layer thickness of 12 to 45nm and the carbon / TiC composite membranes with the single layer thickness of 12 to 45nm by mutual interactions, the nanometer multiple layers of composite membranes contain the components as the weight percentages: 85 to 98 percent of carbon and 2 to 15 percent of TiC, and the total thickness of the multiple layers of the composite membranes is 1.5 to 2.5Mum. The multiple layers of the composite membranes on the joint head and the surface of the acetabular cup of the artificial hip joint have excellent invasive property, wear-resistance performance and high load bearing capacity in the simulated human environment, the corrosion prevention function on the alloy is strong, the biological compatibility is good, the histological reaction is low, the invention has no adverse reaction and no allergic reaction in the human body, thereby greatly improving the reliability of the implant materials and the survival service life of the combined artificial hip joint in the human body.

Description

Technical field [0001] The invention relates to an artificial hip joint, in particular to an artificial hip joint with an alloy joint head and an acetabular cup surface plated with a carbon / TiC nano multilayer composite film. Background technique [0002] The design of an artificial hip joint usually consists of an articular head and an articular socket. In order to reduce the problems that restrict the long-term survival of artificial joint prostheses, which are mainly caused by the wear of the prosthesis interface and the osteolysis induced by wear debris, the head-and-bulb interface of the artificial hip joint implanted in the human body requires good infiltration and lubrication. Good, high abrasion resistance; good biocompatibility, low histological response, effective reduction of wear debris-induced osteolysis and strong corrosion resistance, stable material performance, no harmful metal ions released in the human body, no adverse tissue reactions and no Comprehensive perf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/32A61L27/30A61L27/42
Inventor 涂江平洪春福李众利刘键金攻
Owner ZHEJIANG UNIV
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