Passive middle ear implantation device and preparation method for same

An ear implant, pure titanium technology, applied in the field of biomedical engineering, can solve problems such as low efficiency and high cost

Inactive Publication Date: 2017-04-19
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the deficiencies of the prior art, the object of the present invention is to provide a passive middle ear implant device and its preparation method. The method adopts the Micro MIM process, in the preparation of fine pure titanium powder injection material, mold-aided filling design, and debonding process. Adjustments and improvements have been made in the sintering process and other aspects. The prepared passive middle ear implant has bone conduction, excellent mechanical properties, corrosion resistance, and biocompatibility of titanium, and has a strength that matches human bone tissue. , toughness, elastic modulus and fatigue resistance, can overcome the high cost and low efficiency of the existing technology

Method used

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  • Passive middle ear implantation device and preparation method for same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The forming mold adopts a two-plate mold and a four-cavity structure. The temperature of the mold temperature controller is set at 50°C. The mold adopts a needle-valve hot runner and a vacuum pumping interface auxiliary facility. The gate is located at the outer edge of the disc.

[0063] (1) The D50 of pure titanium powder in the injection material is 16 μm, and the purity meets the chemical composition requirements of the first-grade pure titanium. The volume percentage of pure titanium powder is 60%, and the binder is PEG5000+PMMA95000+SA. The volume percentage of each component in the formula is: PEG5000 86.8%, PMMA95000 10.5%, SA 2.7%, the binder accounts for 40% of the volume percent of the injection material; the above pure titanium powder and binder are placed under an argon protective atmosphere In a blender, heat to 160°C, and after mixing evenly, use granulation equipment to make injection granules with a diameter of about 3mm.

[0064] (2) Put the above-ment...

Embodiment 2

[0071] The forming mold adopts a two-plate mold and a four-cavity structure. The temperature of the mold temperature controller is set at 52°C. The mold adopts a needle-valve hot runner and a vacuum pumping interface auxiliary facility. The gate is located at the outer edge of the disc.

[0072] (1) Pure titanium powder D in the injection material 50 The purity is 5 μm, and the purity meets the chemical composition requirements of first-grade pure titanium. The volume percentage of pure titanium powder is 60%, the binder is PEG7000+PMMA75000+SA, and the volume percentage between the components of the binder is PEG7000 84.8%, PMMA75000 12.5% %, SA 2.7%, the volume percentage of binder is 40%. Put the above pure titanium powder and binder in a mixer under an argon protective atmosphere, heat to 175°C, and after mixing evenly, use granulation equipment to make injection granules with a diameter of about 3mm.

[0073] (2) Put the above-mentioned injection material into the hopper...

Embodiment 3

[0080] The forming mold adopts a two-plate mold and a four-cavity structure. The temperature of the mold temperature controller is set at 40°C. The mold adopts a needle valve type hot runner and a vacuum pumping interface auxiliary facility. The gate is located at the outer edge of the disc.

[0081] (1) Pure titanium powder D in the injection material 50The purity is 25 μm, and the purity meets the chemical composition requirements of the first-grade pure titanium. The volume percentage of pure titanium powder is 64%, the binder is PEG5000+PMMA95000+SA, and the volume percentage between the components of the binder is PEG5000 86.8%, PMMA95000 10.5 %SA 2.7%, the volume percentage of binder is 36%. Put the above pure titanium powder and binder in a mixer under an argon protective atmosphere, heat to 150°C, and after mixing evenly, use granulation equipment to make injection granules with a diameter of about 3mm.

[0082] (2) Put the above-mentioned injection material into the ...

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Abstract

The invention belongs to the technical field of biomedical engineering and specifically relates to a passive middle ear implantation device and a preparation method for the same. The preparation method comprises the steps that pure titanium powder is mixed with a binder for pelleting, and an injection part is obtained through injection shaping processing; then, the mixture is processed by water de-binding, drying, hot de-binding and pre-sintering successively; and sintering processing and post-processing are conducted then, so the passive middle ear implantation device can be obtained finally. The method is characterized in that a Micro MIM technology is adopted to adjust and improve aspects such as preparation of fine and pure titanium powder injection materials, auxiliary filling design of dies, de-binding technologies and sintering technologies; the prepared passive middle ear implantation device has bone conductivity as well as excellent mechanical performance, corrosion resistance and bio-compatibility of metal titanium; the device also has strength , tenacity, elasticity modulus and anti-fatigue performance matched with a human bone tissue; and defects in the prior art that the cost is high and efficiency is low can be overcome.

Description

technical field [0001] The invention belongs to the technical field of biomedical engineering, and in particular relates to a passive middle ear implantation device and a preparation method thereof. Background technique [0002] At present, the incidence of chronic otitis media in my country is as high as 3%, which usually leads to conductive deafness and seriously affects the social production and practice ability of patients. Surgical implantation of passive middle ear devices is required to reconstruct the ossicular chain. An ideal ossicular chain reconstruction material must meet the requirements of good biocompatibility, easy access, convenient use, and excellent sound transmission performance. Although autologous materials have good biocompatibility and do not infect diseases, they are prone to displacement, complete absorption, and residual lesions may remain. If the volume of the residual ossicles is too small, reconstruction cannot be performed. The advantages of a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/22B22F5/00B22F1/00
CPCB22F3/225B22F5/00B22F2999/00B22F2998/10B22F1/103B22F1/10B22F3/1007B22F2201/20B22F2003/247B22F3/1021
Inventor 孔祥吉刘超吴胜文王杰
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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