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Medicinal implant and preparation method thereof

An implant and medical technology, which is applied in the field of medical coating materials and its preparation, can solve the problems of high price, complicated process, and low production efficiency, and achieve the effects of low cost, simple preparation process, and high production efficiency

Inactive Publication Date: 2011-02-02
SICHUAN INST OF MATERIALS & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing preparation methods of tantalum coating biomaterials mainly adopt methods such as solid-state sintering, melt solidification, chemical vapor deposition, and electrodeposition. Impurity elements, especially the thin thickness of the coating, high hardness and low porosity, but too high hardness of the tantalum coating will aggravate the wear of the tissue in contact with it, and the low porosity will affect the firm growth of human tissue in the implant. There are certain restrictions

Method used

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  • Medicinal implant and preparation method thereof
  • Medicinal implant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] figure 1 It is a structural schematic diagram of Embodiment 1 of the medical implant of the present invention. From figure 1 It can be seen from the figure that in the structure of the medical implant of the present invention, the implant 1 is made of 1Cr18Ni9Ti stainless steel base material, and the implant 1 and the tantalum coating 2 are closely combined. The shape of the implant 1 in the figure should be adapted to the shape of the human bone at the implant site. In this embodiment, the structure of the implant 1 is represented by a cylinder, and the shape of the tantalum coating 2 is also consistent with the shape of the implant 1. same.

[0025] figure 2 It is a cross-sectional metallographic photograph of the tantalum coating in Example 1 of the medical implant of the present invention, in which the black parts in the figure are pores, and the white parts are the tantalum coating. Use alumina (white corundum) with a particle size of 1165 mm to sandblast the ...

Embodiment 2

[0032] Using the same tantalum powder raw material, sand blasting treatment and spraying process parameters as in Example 1, a tantalum coating with a porosity volume percentage of 48% can also be obtained on the titanium substrate, and the thickness of the tantalum coating can reach 0.1-2.0 mm. The tensile bonding strength and roughness test results of the coating are shown in Table 2.

[0033] Table 2 Coating performance test results*

[0034]

[0035] *Measurement conditions for tensile bond strength and roughness are the same as those in Table 1

[0036] **The coating did not break within the test limits of the universal testing machine.

Embodiment 3

[0038] image 3 It is a cross-sectional metallographic photograph of the tantalum coating in Example 3 of the medical implant of the present invention, the black parts in the figure are pores, and the white parts are tantalum coatings. Using the same sandblasting pretreatment and tantalum powder raw materials as in Example 3, with argon as the main gas and hydrogen as the auxiliary gas, the atmospheric plasma spraying process parameters are adopted: plasma arc voltage 50 V, current 720 A, powder feeding rate 45 g / min, the spraying distance is 150 mm, and a tantalum coating with a porosity volume percentage of 32% can be obtained; through the same multiple intermittent spraying, the thickness of the tantalum coating can also reach 0.1-2.0 mm, and the tensile strength of the coating can be combined See Table 3 for test results for strength and roughness.

[0039] Table 3 Coating performance test results*

[0040]

[0041]*Measurement conditions for tensile bond strength an...

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Abstract

The invention discloses a medicinal implant and a preparation method thereof, and relates to the fields of medicinal biology and material processing. The medicinal implant comprises an implant and a coating. The medicinal implant is characterized in that: the tantalum coating is coated on the surface of the implant, and the tantalum coating is made of one of tantalum elemental material and tantalum alloy material or tantalum / ceramic composite coating material. The preparation method comprises the following steps of: performing sandblast pretreatment and cleaning on a to-be-coated area of the implant by adopting a sandblast apparatus; and then coating the tantalum coating to the to-be-coated area of the implant by adopting a plasma coating device. The medicinal implant has the advantages of good biocompatibility, simple preparation process, high production efficiency, low production cost, wide matrix selection range, good process controllability, low influence of matrix tissues, high coating roughness, high thickness and wide porosity.

Description

technical field [0001] The invention belongs to the technical field of medical implants, and in particular relates to a medical coating material and a preparation method thereof. Background technique [0002] As a medical biomaterial for implants, in addition to biofunctionality and biocompatibility, its basic requirements must also have a certain degree of porosity, so that new biological tissues can grow into the pores of the material to form a firm bond. For a long time, many implant materials have been clinically used in medicine, including metals, ceramics, organic polymers, etc. Among them, metal materials have good high strength, high hardness, good toughness and impact resistance. It also has an incomparable combination of strength and plasticity between porous ceramics and porous organic polymers. It is particularly important for the application of bone tissue in the bearing parts of the human body. It has become one of the materials widely used in the field of clin...

Claims

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Application Information

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IPC IPC(8): A61L27/30C23C4/12C23C4/08A61L27/40A61L27/04A61L27/06C23C4/04C23C4/131C23C4/134
Inventor 蒋驰李嵘王述钢王嘉勇胡凤云杨帆
Owner SICHUAN INST OF MATERIALS & TECH
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