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Method for preparing titanium alloy hip joint for surgery implantation

A surgical implant and titanium alloy technology, which is applied in the field of human implants, can solve the problems of high brittleness, easy damage, and looseness of hip joint materials, and achieve excellent biocompatibility, small elastic modulus, and low density.

Active Publication Date: 2011-08-17
宝鸡市三立有色金属有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hip joint material made of artificial ceramics is relatively brittle, easy to break and loose
Therefore, there is no human implantable hip joint with high strength, good performance, non-toxicity and good biocompatibility for people to use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] The preparation method of the titanium alloy hip joint for surgical implantation of the present invention is specifically carried out according to the following steps:

[0021] step 1

[0022] According to the mass percentage, 25%-30% of Nb, 5%-5.5% of Zr, 2%-3% of Ta are selected, and the rest is 0~1 grade sponge titanium. The total amount of the above components is 100%; Elemental oxygen mass percentage content <0.15%, hydrogen mass percentage content <0.012%, nitrogen mass percentage content <0.05%, carbon mass percentage content <0.08%, iron mass percentage content <0.25%;

[0023] step 2

[0024] The alloy elements obtained in step 1 are pressed into electrode blocks with a thousand-ton oil press, and the electrodes are welded with argon arc, and then put into a vacuum consumable electric arc furnace for melting through a water-cooled copper crucible. In order to prevent segregation, smelt three times, the first The smelting speed is 5 kg / min during smelting, and...

Embodiment 1

[0033] Select 25% Nb, 5.5% Zr, and 2% Ta according to the mass percentage, and the rest is 0-1 grade sponge titanium. %, nitrogen content -3 mmHg, the melting temperature is 1850°C, the arcing current is 5kA, the melting current is 18000A, and the cooling time is 2.5 hours; the titanium alloy ingot obtained after the third smelting is opened, and the temperature is heated by an electric furnace to 700°C for rotary forging. Deformation to obtain bar forgings; annealing, heating at 700°C, holding time 120min out of the furnace, cooling at room temperature, and then straightening and polishing the bars to obtain polished rods; the polished rods are passed through an automatic CNC five-axis linkage lathe According to the size processing, a titanium alloy hip joint is obtained.

[0034] After testing, the tensile strength of the implanted non-toxic titanium alloy hip joint was 886 MPa.

Embodiment 2

[0036] Select 30% Nb, 5% Zr, and 3% Ta according to the mass percentage, and the rest is 0-1 grade sponge titanium, the total amount of the above components is 100%; the oxygen content of magazine elements is -3 mmHg, the melting temperature is 3300°C, the arcing current is 4kA, the melting current is 6000A, and cooling is 3 hours; the titanium alloy ingot obtained after the third smelting is opened, and the temperature is heated by an electric furnace to 850°C for rotary forging. Deformation to obtain bar forgings; annealing, heating at 850°C, holding time 120min out of the furnace, cooling at room temperature, and then straightening and polishing the bars to obtain polished rods; the polished rods are passed through an automatic CNC five-axis linkage lathe According to the size processing, a titanium alloy hip joint is obtained.

[0037] After testing, the tensile strength of the implanted non-toxic titanium alloy hip joint was 868 MPa.

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Abstract

The invention discloses a method for preparing a titanium alloy hip joint for surgery implantation. The method comprises the following steps of: selecting 25 to 30 mass percent of Nb, 5 to 5.5 mass percent of Zr, 2 to 3 mass percent of Ta and the balance of titanium sponge; pressing the materials into an electrode-block welding electrode and smelting, wherein the smelting speed at the first time is 5 kilograms per minute, and the smelting speed at the second time and the third time is 8 kilograms per minute; the smelting temperature at each time is 1,850 to 3,300 DEG C, an arc striking current is 4 to 5 kilo-amperes, and a smelting current is 6 to 18 kilo-amperes; cooling for 2.5 to 4.5 hours; cogging and heating to 700 to 850 DEG C, and performing rotary swaging and deformation; annealing and heating at the temperature of 700 to 850 DEG C; keeping the temperature for 60 to 120 minutes and taking out from the furnace; cooling at room temperature, and straightening and polishing a bar material; and machining the ground bar so as to obtain the titanium alloy hip joint. The prepared hip joint is free from toxic elements and host response, approximates to a natural bone and has high bone conduction.

Description

technical field [0001] The invention belongs to the technical field of human body implants, and relates to a method for preparing a titanium alloy hip joint for surgical implantation. Background technique [0002] Existing human implant hip joints are usually made of the following three materials: 1) stainless steel, 2) cobalt, chromium, and molybdenum alloys, and 3) ceramics. [0003] Stainless steel (GB4243 standard) 00Gr 18 Ni 14 Mo 3 N and 00Gr 18 Ni 16 Mo 3 The hip joint made of N, due to the toxic elements Cr, Ni, Mn, etc. in the stainless steel, these metal ions are likely to cause allergic reactions and toxic reactions. Hip joints made of cast cobalt, chromium, and molybdenum alloys (GB17100 and ISO5832 standards) also contain toxic elements such as Cr, Ni, and Mn, which can cause bone cell toxicity and have toxic side effects on the human body. The hip joint material made of artificial ceramics is relatively brittle, easily damaged and loosened. Therefore, a...

Claims

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Application Information

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IPC IPC(8): A61F2/32A61L27/06
Inventor 翟丽君郭永喜杨海波
Owner 宝鸡市三立有色金属有限责任公司
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