Powder for preparing porous material by laser synthesis reaction

A porous material, laser synthesis technology, used in powder coatings, devices for coating liquids on surfaces, coatings, etc. The problem of poor strength and fracture toughness can make up for the difficulty of bearing large loads, solve the problem of mechanical compatibility, and overcome the poor strength and fracture toughness.

Inactive Publication Date: 2006-07-19
SHENYANG POLYTECHNIC UNIV
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  • Application Information

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Problems solved by technology

Implantation experiments in vivo have proved that hydroxyapatite coating can strongly promote the chemical bonding of bone, has a very high biocompatibility, can accelerate the growth of new bone, and has been used clinically, but the hydroxyapatite coating Coated human bones and artificial joints still have problems with mechanical properties
Such as the coefficient of thermal expansion of HA (15×10 -6 K -1 ) than titanium alloy (8.8×10 -6 K -1 ) is much larger, and the strength and fracture toughness of the coating are poor, and the bonding force between the coating and the substrate is not high enough. As an implant material, its long-term clinical effect is not ideal, especially for young patients and patients with high activity , higher failure rate, often requiring reoperation after several years

Method used

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  • Powder for preparing porous material by laser synthesis reaction
  • Powder for preparing porous material by laser synthesis reaction
  • Powder for preparing porous material by laser synthesis reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Grind the 10mm×10mm×5mm NiTi substrate and the surface to be observed of the porous coating sample to a metallographic sample, wash and dry it with deionized water, and place it in a reagent bottle filled with 200mL, 37°C simulated human body fluid SBF solution After soaking, the SBF solution in the bottle is replaced every 2 days to keep the composition of the SBF soaking solution basically constant. The two samples soaked in the SBF solution were taken out at the same time regularly, washed with deionized water, and dried at 50°C. SEM-EDX was used to observe and analyze the deposition and composition of bone-like apatite on the surface of the sample, and Nicolet Fourier transform infrared Spectroscopic (FTIR) analysis of the chemical structure of the sediment.

[0070] The formation of bone-like apatite on biomaterials is a prerequisite for its osteoinductivity. Therefore, studying the factors that affect the formation of bone-like apatite in implant materials is an e...

Embodiment 2

[0073] Animal implantation experiments. The animals selected for the experiment were 2 18-month-old male rabbits with body weights of 6.5Kg and 6.3Kg respectively. Animals were fasted the night before surgery and water was deprived on the same day. Pentobarbital sodium narcotics were injected through the ear according to conventional methods, and routine disinfection was performed. According to previous research experience, the implantation site of the implant material affects the bone formation in the body. In order to successfully induce the production of bone cells, the muscles near the vertebrae of the back were selected as the implantation site. An incision about 8 cm long was made on the back of the rabbit, the skin and subcutaneous tissue were cut open, the muscle tissue was exposed, and the intermuscular space was separated. Two samples of NiTi alloy dense material and porous coating were implanted into the rabbit's back spine in groups. There were 8 parallel samples...

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Abstract

The invention provides a paint for preparing porous materials through laser synthesizing reaction, wherein the paint comprises 20-80 wt% of NiTi shape memory powdered alloy, 2-10 wt% of high molecular polymer as binding agent and balancing TiH2 powder.

Description

Technical field: [0001] The invention relates to a laser synthesis reaction, and in particular provides a powder technology and formula for laser reaction synthesis of a porous biomimetic structure coating. The porous coating prepared on the surface of a NiTi shape memory alloy can significantly improve the biocompatibility of the NiTi shape memory alloy , which is conducive to the fixation and long-term stable existence of implants in human tissues. Background technique: [0002] The bone and joint system are the tissues and organs that bear the load of the human body. The repair and replacement materials after their defects should have high mechanical strength. Therefore, metal biomaterials have always been the main materials for orthopedic surgery and are widely used in hard tissues in medicine. Substitution, restoration and manufacture of medical devices. For surgical implant materials, as biocompatible metals or alloys Ti, Ti6Al4V, Co-Cr, and NiTi shape memory alloys a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D129/04C09D1/00C09D5/03B05D7/14
Inventor 张春华张松
Owner SHENYANG POLYTECHNIC UNIV
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