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Method for forming medical porous nano magnesium alloy through micro-arc oxidation and laser cladding

A technology of micro-arc oxidation and laser cladding, which is applied in the field of medical implants, can solve problems such as poor affinity and degradability, inability of bone tissue to grow inward, and failure to heal, so as to promote healing and ensure normal contraction and body temperature Effect of adjusting and improving corrosion resistance

Inactive Publication Date: 2021-08-06
SHANDONG JIANZHU UNIV
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Problems solved by technology

Traditional medical materials have poor compatibility and degradability with the human body, bone tissue cannot grow inward, and cannot heal with human bones

Method used

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  • Method for forming medical porous nano magnesium alloy through micro-arc oxidation and laser cladding

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Experimental program
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Embodiment Construction

[0032] Step 1: Perform 3D reconstruction of the knee joint based on CT data to obtain a 3D model of the knee joint, perform grid division on the 3D model of the knee joint and assign density values ​​to obtain a heterogeneous knee joint model.

[0033]Step 2: Mix metal powders with the following composition (mass percentage) into magnesium alloy powder: 3.0% nickel, 2.0% molybdenum, 2.5% cobalt, 2.0% silver, 4.0% titanium, and the rest are magnesium and Unavoidable impurities, the sum of the above components is 100%.

[0034] Step 3: Put the mixed powder with a ball-to-material ratio of 40:1 into a ZJM-20 / 25 agitating ball mill, and ball mill at a speed of 4000r / min for 5 hours to finally obtain a mixed nano-powder with a size below 100nm.

[0035] Step 4: Add the mixed nano-magnesium alloy powder obtained in Step 2 to the laser 3D printing system, and add ultrasonic auxiliary equipment to the device. Under the action of ultrasonic waves, the laser 3D printing system will las...

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Abstract

The invention relates to a method for forming a medical porous nano magnesium alloy through micro-arc oxidation and laser cladding. Three-dimensional reconstruction is carried out on a knee joint by using CT data to obtain a thighbone three-dimensional model, and further a heterogeneous thighbone model is obtained; then magnesium alloy powder is proportioned and processed through the 3D printing technology to form a required skeleton blank, then a porous and rough structure is formed on the surface of a skeleton model through micro-arc oxidation treatment, and cell adhesion and osteogenesis regeneration are facilitated; and finally, surface coating treatment is carried out on the skeleton model by laser cladding to form a wear-resistant and corrosion-resistant compact ceramic wear-resistant coating. The method has the advantages that the magnesium alloy standard electrode is low in potential and is absorbed and degraded along with self-healing of a human body after being implanted into the human body, and secondary operation is not needed. The density, the elastic modulus, the compressive yield strength and the fracture toughness of a magnesium alloy artificial bone are closer to corresponding values of a human skeleton, so that the complexity of an operation can be simplified, and the success rate of the operation is improved.

Description

technical field [0001] The invention is applied in the field of medical implantation, and specifically relates to a method for designing a medical porous nano-magnesium alloy with degradability, human body affinity and mechanical properties close to human bone by using micro-arc oxidation and laser cladding technology. Background technique [0002] The knee joint is an important load-bearing joint of the lower limbs, and its structure and function are the most complex among human joints. Knee degenerative osteoarthropathy is a common disease of the elderly. According to reports, the incidence of knee osteoarthritis with symptoms over the age of 50 is 35% for men and 74% for women. Severe knee osteoarthrosis requires artificial knee replacement Knee replacement surgery can relieve knee pain, improve knee function, correct knee deformity and obtain long-term stability. [0003] However, the biometal materials currently used in clinical practice mainly include stainless steel,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F10/38B22F10/62B22F10/28C22C23/00C25D11/30C23C24/10A61L27/04A61L27/30A61L27/56B33Y10/00B33Y40/20B33Y70/00
CPCA61L27/047A61L27/306A61L27/56A61L2300/404A61L2430/24B22F3/11B22F3/24B22F2003/242B33Y10/00B33Y70/00B33Y40/20C22C23/00C23C24/103C25D11/026C25D11/30
Inventor 徐淑波赵晨浩薛现猛
Owner SHANDONG JIANZHU UNIV
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