Preparation process of titanium nitride-coated artificial joint

An artificial joint and preparation process technology, applied in metal material coating process, coating, solid diffusion coating and other directions, can solve the problems of easy peeling, low coating crystallinity, weak bonding strength, etc., and achieve a good biological phase. Compatibility and biological activity, simple equipment and preparation process, effect of improving hardness and wear resistance

Inactive Publication Date: 2014-08-20
赵全明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it has poor biological activity and cannot induce bone tissue growth; poor wear resistance, and the wear particles produced can easily induce aseptic loosening of the prosthesis; it can only rely on mechanical fixation to combine with bone tissue, and cannot achieve osseobonding with bone tissue
[0004] In the prior art, HA coating is mainly used to promote the growth of bone tissue into the prosthesis, but there are many problems: (1) the crystallinity of the coating is low, it is easy to degrade in body fluids, and the service life is short; (2) the bonding strength Weaker, prone to peeling off after implantation; (3) Expensive
Studies in recent years have found that titanium nitride coatings have good tissue compatibility, bioactivity and antibacterial properties, and have begun to be applied in the field of oral dental implants, but so far, there have been no reports in the field of artificial joints

Method used

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  • Preparation process of titanium nitride-coated artificial joint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Titanium Nitride Coating Fabrication for Artificial Hip Prosthesis.

[0023] The femoral part of the artificial hip joint prosthesis is made of titanium-based metal. The surface is ground and polished, and after ultrasonic cleaning, it is placed in a glow ion nitriding furnace to protect the surface that does not need coating, and place it at the cathode position After sealing, when the vacuum is evacuated to 100Pa-200Pa, turn on the power and start arcing. When the voltage increases to 400~800V, the glow is ignited, and the glow flash point appears on the surface of the sample. A small amount of ammonia gas is introduced to control the test temperature. The temperature is 900°C, adjust the voltage and current to stabilize the pressure in the furnace at about 300Pa, and last for 4 hours. After the reaction is completed, cool down to room temperature with the furnace.

Embodiment 2

[0025] Titanium Nitride Coating Fabrication for Artificial Hip Prosthesis.

[0026] The tibial part of the artificial knee joint prosthesis is made of titanium-based metal. The surface is ground and polished, and after ultrasonic cleaning, it is placed in a glow ion nitriding furnace to protect the surface that does not need coating and place it at the cathode position After sealing, when the vacuum is evacuated to 100Pa-200Pa, turn on the power and start arcing. When the voltage increases to 400~800V, the glow is ignited, and the glow flash point appears on the surface of the sample. A small amount of ammonia gas is introduced to control the test temperature. The temperature is 900°C, adjust the voltage and current to stabilize the pressure in the furnace at about 300Pa, and last for 4 hours. After the reaction is completed, cool down to room temperature with the furnace.

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Abstract

The invention belongs to the technical field of surgical implants and relates to a preparation process of a titanium nitride-coated artificial joint. A titanium nitride coating formed on the surface of an artificial joint prosthesis has high biocompatibility and bioactivity and is capable of improving the hardness and wear resistance of the prosthesis. The titanium nitride coating on the surface of the artificial joint prosthesis is formed through a chemical reaction, is combined with substrate chemical bonds and is prevented from falling off, so that the long-term postoperative effect of the prosthesis is ensured; meanwhile, the artificial joint prosthesis is fixed biologically, so that the generation of bone cement fixing wear particles is avoided, the generating rate of aseptic loosening is lowered, and the service life of the artificial joint is prolonged.

Description

technical field [0001] The invention belongs to the technical field of surgical implants, and relates to a preparation process of a titanium nitride coating on the surface of an artificial joint. Background technique [0002] Artificial joint replacement is recognized as the treatment of choice for various terminal joint diseases. However, as the number of artificial joint replacements continues to increase, complications such as prosthesis loosening and sinking caused by this operation also increase, which seriously affects the clinical efficacy. [0003] ] Titanium-based metals are currently the main implant materials for artificial joint prostheses because of their low density, high strength, similar specific gravity to human bone tissue, and good biocompatibility. However, it has poor biological activity and cannot induce bone tissue growth; poor wear resistance, and the wear particles produced can easily induce aseptic loosening of the prosthesis; it can only rely on m...

Claims

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Application Information

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IPC IPC(8): A61L27/30A61L27/50C23C8/36
Inventor 赵全明
Owner 赵全明
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