Coating for improving bioactivity of stainless-steel bone lamella and bone nail

A biologically active, stainless steel technology, applied in coating, metal material coating process, vacuum evaporation plating, etc., can solve the problems of allergies, infection and loosening, and achieve inhibition of dissolution and exudation, smooth surface and good reliability Effect

Inactive Publication Date: 2012-07-18
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a coating for improving the biological activity of stainless steel bone plates and bone screws to improve bone Plate and screw life and reliability

Method used

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  • Coating for improving bioactivity of stainless-steel bone lamella and bone nail
  • Coating for improving bioactivity of stainless-steel bone lamella and bone nail

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Step 1: The stainless steel plate or wire is processed into bone plate and bone nail blanks that meet the requirements of the industry standard, and the bone plate and bone nail blanks are electrochemically polished, and then cleaned with acetone, distilled water and absolute ethanol in sequence; The second step: grow the composite coating in ultra-high vacuum magnetron sputtering equipment, the cathode uses high-purity metal Ti and hot-pressed sintered ceramic TiB 2 as the target; first, grow a pure metal Ti layer with a thickness of 50nm, and the process parameters are as follows: sputtering power 10W, working pressure 0.35Pa, substrate heating temperature 250°C, substrate negative bias 0V; then, grow TiB 2 layer, the thickness is 450nm, and the process parameters are as follows: sputtering power 120W, working pressure 0.5Pa, substrate heating temperature 450°C, substrate negative bias voltage 60V; total thickness of composite coating 500nm; third step: fully grown bon...

Embodiment 2

[0020] Step 1: The stainless steel plate or wire is processed into bone plate and bone nail blanks that meet the requirements of the industry standard, and the bone plate and bone nail blanks are electrochemically polished, and then cleaned with acetone, distilled water and absolute ethanol in sequence; The second step: grow the composite coating in ultra-high vacuum magnetron sputtering equipment, the cathode uses high-purity metal Ti and hot-pressed sintered ceramic TiB 2 as the target; first, grow a pure metal Ti layer with a thickness of 100nm, and the process parameters are as follows: sputtering power 20W, working pressure 0.3Pa, substrate heating temperature 250°C, substrate negative bias 0V; then, grow TiB 2 layer with a thickness of 900nm, and the process parameters are as follows: sputtering power 150W, working pressure 0.35Pa, substrate heating temperature 450°C, substrate negative bias 60V; the total thickness of the composite coating is about 1μm; the third step: f...

Embodiment 3

[0022] Step 1: The stainless steel plate or wire is processed into bone plate and bone nail blanks that meet the requirements of the industry standard, and the bone plate and bone nail blanks are electrochemically polished, and then cleaned with acetone, distilled water and absolute ethanol in sequence; The second step: grow the composite coating in ultra-high vacuum magnetron sputtering equipment, the cathode uses high-purity metal Ti and hot-pressed sintered ceramic TiB 2 as the target; first, grow a pure metal Ti layer with a thickness of 250nm, and the process parameters are as follows: sputtering power 30W, working pressure 0.25Pa, substrate heating temperature 250°C, substrate negative bias 0V; then, grow TiB 2 layer, TiB 2 It is a functional coating with a thickness of 2.25 μm. The process parameters are as follows: sputtering power 180W, working pressure 0.2Pa, substrate heating temperature 425°C, substrate negative bias 60V; the total thickness of the composite coatin...

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Abstract

The invention discloses a coating for improving bioactivity of a stainless-steel bone lamella and a bone nail. The Ti / TiB2 composite coating grows on the surface of a stainless-steel bone lamella and bone nail matrix (1), and the thickness of the Ti / TiB2 composite coating ranges from 500nm to 5mum; the inner layer of the composite coating, close to the bone lamella and bone nail matrix, is a pure-metal Ti layer (2) serving as a transition layer; and an external layer, namely a TiB2 layer (3), grows on the pure-metal Ti layer and serves as a function film layer. According to the invention, the pure-metal Ti layer grows on the surface of the bone lamella and bone nail matrix (1) by an ultrahigh vacuum magnetron sputtering method, and the TiB2 layer grows on the pure-metal Ti layer, so that the composite coating has better biocompatibility, frictional wear resistance and chemical stability, can effectively inhibit dissolution and seepage of toxic elements in stainless-steel matrix materials, and can reduce tissue reaction and aseptic loosening of the matrix, prolong the service life of the matrix and enhance the reliability of the matrix.

Description

technical field [0001] The invention relates to the field of implanted medical devices, in particular to a coating for improving the bioactivity of stainless steel bone plates and bone nails. Background technique [0002] Most of the clinically used bone plates and bone screws are made of stainless steel, which is because stainless steel is cheap, has good mechanical properties, and has a certain degree of biological inertia. However, clinical experiments have found that when nickel-containing medical stainless steel is implanted into the human body (stainless steel generally contains 7-8% nickel), due to inevitable corrosion and wear, metal ions such as nickel ions will be released to adjacent tissues, which is easy to induce Allergy, infection and other tissue reactions. In addition, the enrichment of nickel ions in organisms can induce toxic effects, cell destruction and inflammation, and cause teratogenic and carcinogenic hazards to organisms. On the other hand, corros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L31/08C23C14/35
Inventor 周广宏丁红燕章跃夏木建庄国志侯化龙
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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