Surface treatment method for SLM molded titanium implant

Abstract

The invention discloses a surface treatment method for an SLM molded titanium implant. The surface treatment method comprises the following steps: carrying out SLM molding on the titanium implant; carrying out sand blasting treatment: adopting corundum or titanium dioxide to carry out surface sand blasting treatment on the surface of the SLM molded titanium implant; picking to remove impurities: putting the SLM molded titanium implant subjected to the sand blasting treatment into a pickling solution to carry out pickling treatment; carrying out alkali thermal treatment: putting the SLM molded titanium implant subjected to the pickling treatment into an alkali solution to carry out hydro-thermal treatment; carrying out calcification treatment: taking a calcium salt solution as a cationic exchange fluid, putting the SLM molded titanium implant subjected to the alkali thermal treatment into the cationic exchange fluid at a temperature of 100-200 DEG C to carry out hydro-thermal treatment for 1-5 hours; and after teach step, sequentially putting the SLM molded titanium implant into acetone, 95% alcohol and deionized water to respectively ultrasonically clean and dry. The surface treatment method is simple in step, and is easy to operate; and the surface, with a micro-nano grading structure, of the SLM molded titanium implant is constructed, so that the roughness, the microstructure, the mineralization characteristics and the biological activity of the surface of the SLM molded titanium implant are effectively improved.

Description

technical field [0001] The invention relates to the technical field of surface treatment of biomedical metal implant materials, in particular to a method for surface treatment of SLM formed titanium implants. Background technique [0002] With the development of medicine and 3D printing technology, titanium artificial implants using titanium powder selective laser melting stereolithography (SLM) are increasingly used to treat bone tissue lesions and repair defects, such as dental implants, Artificial joints, and bone internal fixation devices, etc. It makes the clinical treatment rise from the primary simple "repair" treatment to a higher level - bone tissue "replacement" treatment, thereby greatly improving people's quality of life. An ideal SLM laser rapid prototyping titanium-based bone implant should perform its corresponding physiological functions in the form of tight integration with bone tissue (Osseointegration). However, a considerable part of SLM laser rapid prot...

AI Technical Summary

Problems solved by technology

Chinese patent (application number) CN201410093637.X discloses a method for preparing a calcium-phosphorus-silver nanotube array on the surface of medical titanium. On the surface of the titanium matrix, the diameter of the tube is also limited to the nanometer range, and the interface with the surrounding bone tissue is limited to a certain extent.

[0005] Titanium implants currently in commercial use lack an ideal micro-nano composite surface microstructure, and there are problems such as unsatisfactory surface hydrophilicity. At the same time, the preparation effect of its surface activation components is not ideal, which affects its interface stability.

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