Method using laser quick forming producing HA/Ti gradient biological activity material

A laser rapid prototyping and bioactive technology, applied in the medical field, can solve the problems of difficult control of the product phase composition, residual thermal stress, discontinuous process flow, etc.

CN101249279AInactive Publication Date: 2008-08-27FOURTH MILITARY MEDICAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2008-08-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for preparing a HA / Ti gradient biological activity material by adopting laser rapid forming. The method introduces the conception of gradient function material, changes the mixture ratio of CaHPO4*2H2O+CaCO3 and titanium powder in a gradient way, and adopts the laser rapid forming technology to melt and cover the mixing material into the surface of titanium metal directly in hope of obtaining the medical gradient biological activity material with good bonding strength, thereby improving the proliferation and differentiation of the osteocyle on the metal surface, solving the difficulty of the early bonding between the metal implantation material and the bone, and providing a theoretical and experimental basis for better clinic application of titanium.
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Description

technical field

[0001] The invention belongs to the field of medicine, and relates to a method for preparing metal functional materials or a surface modification treatment method for metal implants, in particular to a method for preparing HA / Ti gradient bioactive materials by laser rapid prototyping, which is used to prepare bone tissue metal implant. Background technique

[0002] As biologically inert materials, titanium and titanium alloys are widely used in stomatology, orthopedics and adjacent disciplines due to their good mechanical properties and biocompatibility, and can be processed into dental implants, artificial joints, bone plates, intramedullary nails, etc. . With the trend of population aging, the number of implants such as dental implants and artificial joints is increasing year by year. In terms of dental implants, the total domestic demand exceeds 4 million pieces. At present, about 1.5 million people around the world receive artificial joint replacement e...

Examples

Embodiment Construction

[0029] 5.1 Laser plus equipment

[0030] see figure 1 , Laser processing equipment includes lasers, two-way or three-way powder feeders, substrates, molten pools, CNC workbenches (CNC), and protection boxes.

[0031] 5.2 Experimental materials

[0032] Choose pure titanium powder with a particle size of 100-300 mesh, as well as CaHPO4·2H2O and CaCO3 powder. All powder particles are spherical and have good fluidity. The range of powder feeding volume is 1-10g / min, and the powder feeding accuracy is controlled at ±3%. The base material is pure titanium with a thickness of 4mm to 8mm.

[0033] 5.3 Experimental method

[0034] The base material is pure titanium (TA2) forged plate (140mm×60mm×6mm). Before the experiment, the surface of the plate was polished with No. 200 sandpaper and then cleaned with acetone to decontaminate. Put the powder into the two-way or three-way automatic powder feeder respectively. Adjust the output of powder, pure titanium powder in accordance wit...