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Medical titanium implant polishing technology

An implant and process technology, which is applied in the polishing process of medical titanium implants, can solve problems such as difficult cleaning, high aluminum content on the surface of titanium parts, and aluminum element enrichment.

Active Publication Date: 2020-10-23
FOSHAN YIHE BIOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the popular mechanical polishing methods for titanium parts on the market use aluminum-containing abrasives such as brown corundum, white corundum, high-frequency porcelain, high-alumina porcelain, etc., so that the aluminum content on the surface of titanium parts after mechanical polishing is higher than the standard value. and difficult to clean
If medical titanium implants are treated with the existing common mechanical polishing method of titanium parts, it will easily lead to the enrichment of aluminum on the surface of medical titanium implants, which will be harmful to the human body during long-term use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of additive manufacturing medical titanium implant, the mass fraction of its each component is as follows: Fe:0.10wt%, C:0.020wt%, H:0.025wt%, N:0.022wt%, O:0.14wt% and Ti: margin. The medical titanium implants used in this example are 4 craniofacial bone plates of the same size, 50 mm long, 10 mm wide, and 2 mm thick, with 4 screw holes evenly distributed on the plate, and the diameter of the screw holes is 2 mm.

[0035] The above-mentioned medical titanium implant was made by 3D printing, (SLM, selective laser melting technology, laser powder bed printing) forming parameters are as follows: substrate temperature: 200°C; laser power: 100W; scanning speed: 360mm / s; scanning distance: 0.08mm; layer thickness: 0.03mm. The surface roughness Ra of the obtained printed part was 4.27 μm.

[0036] This embodiment provides the aluminum-less polishing treatment method for the above-mentioned additive manufacturing of medical titanium implants, according to figure 1 Th...

Embodiment 2

[0044] Using the same additive as in Example 1 to manufacture medical titanium implants, according to figure 1 The shown aluminum-less polishing treatment process method of the present invention carries out polishing treatment:

[0045] Step 1, coarse grinding, resin grinding material (composition is phenolic resin+quartz sand, specification is conical 4*4mm) and diamond abrasive liquid (particle size is 15 microns, solid concentration is 3%) in the centrifugal grinder (according to Resin abrasive: medical titanium implant = 9:1 volume ratio, and resin abrasive: diamond abrasive liquid = 3:1 mass ratio), set 100r / min (40-200r / min is acceptable) for grinding for 20min ( 10 to 30 minutes), remove the surface dirt and sharp edges of the resin abrasive, and then add the medical titanium implant, set the machine speed to 480r / min, and the time is 1h; the concave surface roughness Ra of the medical titanium implant after grinding is 1.58μm;

[0046] Step 2, fine grinding, the zirc...

Embodiment 3

[0052] Using the same additive as in Example 1 to manufacture medical titanium implants, according to figure 1 Shown less aluminum polishing treatment process method of the present invention is polished:

[0053] Step 1, coarse grinding, resin grinding material (composition is phenolic resin+quartz sand, specification is conical 4*4mm) and diamond abrasive liquid (particle size is 15 microns, solid concentration is 3%) in the centrifugal grinder (according to Resin abrasive: medical titanium implant = 9:1 volume ratio, and resin abrasive: diamond abrasive liquid = 3:1 mass ratio), set 100r / min (40-200r / min is acceptable) for grinding for 20min ( 10 to 30 minutes), remove the surface dirt and sharp edges of the resin abrasive, and then add the medical titanium implant, set the machine speed to 400r / min, and the time is 2h; the concave surface roughness of the medical titanium implant after grinding is Ra 1.43μm;

[0054] Step 2, fine grinding, the zirconia abrasive and the al...

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Abstract

The invention discloses a medical titanium implant polishing technology. The technology includes the steps of the adoption of resin abrasives, rough grinding carried out by diamond grinding liquid, the adoption of zirconia abrasives, fine grinding carried out by an abradant without containing aluminum, and lightening carried out by wood abrasives. According to the technology, through the selectionof grinding composition, medical titanium implant is subjected to the rough grinding, the fine grinding, and surface lightening, a polishing product with good roughness and low aluminum content is obtained, the polishing effect is guaranteed, and meanwhile the problem of high aluminum content on the surface after mechanical polishing in an existing technology can be overcome.

Description

technical field [0001] The invention belongs to the field of surface treatment of materials, in particular to a polishing process for medical titanium implants. Background technique [0002] The medical community recognizes that aluminum has a toxic effect on living organisms. In the long run, aluminum toxicity can lead to various health problems, including language expression, memory loss, headache, anemia, renal insufficiency, liver disease, extreme nervousness, rickets, gastrointestinal Discomfort, bone softening, colic, negative effects such as calcium ion metabolism. In extreme cases, the symptoms of aluminum poisoning can be very similar to Alzheimer's disease. Aluminum can be easily absorbed into the blood. But since it is not easily excreted in the urine, it remains in the body. When the amount exceeds the body's ability to detoxify, the excess resides in different parts of the body, including the heart, brain, muscle tissue, spleen, bones and liver. If it accumu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B1/00
CPCB24B1/00
Inventor 颜瑜张春雨陈贤帅杜如虚
Owner FOSHAN YIHE BIOTECHNOLOGY CO LTD
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