Method for preparing hollow fiber multiporous biological titanium material

A bio-titanium and fiber technology, applied in the field of bioengineering, can solve the problems that the pore density and uniformity are not easy to precisely control, the process is complicated, and the manufacturing cost is high. The effect of stress shielding

Inactive Publication Date: 2007-10-17
SHANGHAI JIAO TONG UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional porous metal manufacturing technology can be divided into the following three categories: (1) Liquid metal and gas physical mixing method to prepare porous metal, by injecting gas into the liquid metal, forming porous metal after cooling, the disadvantage is that the pore density and uniformity are not easy Precise control; not suitable for the preparation of alloy foam materials with high liquid viscosity; for the gas injected into the liquid metal, it should also avoid reacting with the metal
(2) The solid-gas phase eutectic solidification method requires the presence of a eutectic reaction between the solidified metal and the gas phase, and the number, size, shape and direction of the pores are affected by the amount, pressure, direction, rate of thermal movement and alloy chemical composition of the gas added. control, and therefore have very limited
(3) Porous metals are manufactured by powder metallurgy method, after metal powder making, pressing molding, sintering and other process links, the disadvantage is that the process is complicated and the cost is high
However, the process is very complicated, with multiple processes and high manufacturing costs.

Method used

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  • Method for preparing hollow fiber multiporous biological titanium material
  • Method for preparing hollow fiber multiporous biological titanium material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The TA9 titanium alloy fiber with a specification of φ0.08mm is randomly wound on a dense mandrel with a diameter of about 8.0mm, and shaped. Put the mandrel with 20g of titanium alloy fiber wound on the surface into a steel mold with an inner diameter of 20mm, compact it with a hollow pressure head with an inner diameter equal to the diameter of the compact mandrel at a pressure of 0.3T, hold the load for 10 seconds, remove the mold and Mandrel, the porous titanium rod or column compacted into green body is sintered under vacuum (vacuum degree is 2×10 -3 Pa), sintering temperature range: 1200°C, sintering time: 6 hours. After sintering, the hollow fiber porous bio-titanium material is obtained, the porosity is 76.6%, and the connectivity of the pore phase is good.

Embodiment 2

[0027] The TA9 titanium alloy fiber with a specification of φ0.08mm is randomly wound on a dense mandrel with a diameter of about 8.0mm, and shaped. Put the mandrel with 20g of titanium alloy fiber wound on the surface into a steel mold with an inner diameter of 20mm, use a hollow indenter with an inner diameter equal to the diameter of the compact mandrel to compact it at a pressure of 0.6T, hold the load for 15 seconds, remove the mold and Mandrel, the porous titanium rod or column compacted into green body is sintered under vacuum (vacuum degree is 2×10 -3 Pa), sintering temperature range: 1250°C, sintering time: 3 hours. After sintering, a hollow fiber porous bio-titanium material is obtained, with a porosity of 47.3%.

Embodiment 3

[0029] The TA0 pure titanium fiber with a specification of φ0.15mm is randomly wound on a dense mandrel with a diameter of about 8.0mm, and shaped. Put the mandrel with 25g of pure titanium fiber wound on the surface into a steel mold with an inner diameter of 20mm, compact it with a hollow pressure head with an inner diameter equal to the diameter of the compact mandrel at a pressure of 0.6T, hold the load for 10 seconds, remove the mold and Mandrel, the porous titanium rod or column compacted into green body is sintered under vacuum (vacuum degree is 2×10 -3 Pa), sintering temperature range: 1200°C, sintering time: 2 hours. After sintering, a hollow fiber porous bio-titanium material is obtained, with a porosity of 52.0%.

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Abstract

A preparation method of hollow fiber multihole biologic titanium material belongs to biotechnology field. The invention includes steps: (1) wrapping titanium or titanium alloy fiber on a compact core rod, shaping; (2) putting the core rod wrapped with titanium or titanium alloy fiber in a mould, compacting by a hollow pressure head having inner diameter equal to diameter of the compact core rod, keeping load under load pressure, removing the mould and the core rod to get hollow multihole rods or columns with required length and porosity; (3) putting multihole titanium rods or columns compacted as body, sintering in vacuum or argon atmosphere to get hollow fiber multihole biologic titanium material. The method of this invention is simple, can get slim hollow fiber multihole biologic titanium material having optional ratio of length and diameter, fibre distribute uniformly, surface is flatten via shaping; good controllability of central cavity size, aperture and porosity, simple preparation method, fast speed, high rate of finished products, low cost.

Description

technical field [0001] The invention relates to a method in the technical field of bioengineering, in particular to a method for preparing a hollow fiber porous biological titanium material. Background technique [0002] Among metal biomaterials, biotitanium is the most ideal metal biomaterial for long-term or permanent human implantation due to its ideal biocompatibility, excellent corrosion resistance, high fatigue strength, and low elastic modulus. However, the elastic modulus of bio-titanium is still higher than that of natural bone, so that titanium, as the support of the skeleton, is not in harmony with the deformation of the skeleton body under stress conditions, which makes the former easy to detach from the latter, which is not conducive to patients rehabilitation. One of the effective solutions is to prepare porous titanium or porous titanium alloys to obtain metal biomaterials with low elastic modulus and moderate strength. Under a certain porosity, the mechanic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/06
Inventor 刘萍吴鲁海何国
Owner SHANGHAI JIAO TONG UNIV
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