Preparation method of multilevel cellular structure for medical pure titanium implant surface

Abstract

The invention provides a preparation method of a multilevel cellular structure for a medical pure titanium implant surface. The preparation method comprises the step of pretreatment of surface: placing a pure titanium implant into the mixed liquid, and ultrasonically cleaning, then drying; the step of sand blasting, wherein the surface subjected to the sand blasting is changed from metallic luster of silver to lead, concave pits with different depth are formed, and the aperture is ranged from 10 to 40 microns; and the step of acid etching: placing the test sample subjected to the sand blasting into the mixed solution for acid etching, wherein the surface subjected to magnetic stirring has color darker than that before sand blasting, cellular pores are formed based on the concave pits formed in sand blasting, and the aperture is ranged from 0.5 to 3 microns. According to the preparation method, white emery sand higher in purity is adopted and used as the main material for sand-blasting abrasive, so that nearly no pollution is brought to the surface, and the implant surface is prevented from deep damaging; and the titanium dioxide is beneficially used for preventing the sharp from occurring on the surface to result in damage. The multilevel cellular structure is prepared on the implant surface, no particles produced in stand blasting are residual, the benefit is provided for the combination respect to the bone tissue, and the healing time is reduced.

Description

technical field [0001] The invention relates to the technical field of surface modification of biomedical dental implants, in particular to a method for preparing a multi-level microporous structure on the surface of medical pure titanium implants. Background technique [0002] As one of the medical materials implanted in the body, titanium's surface structure is an important factor affecting the quality of the implant, and largely determines whether the implant can be combined with the bone for a long time and perform its function. The existence of microporous structure on the surface of titanium implant can increase the surface area of ​​the implant, improve the mechanical locking force, and facilitate the combination of the implant and bone tissue. Studies have shown that primary holes with a diameter of about 10-50 μm can promote the retention of osteoblasts on the surface of the implant, and secondary holes with a diameter of about 0.5-4 μm can promote the attachment of...

AI Technical Summary

Problems solved by technology

[0006] The above technical solutions all use sandblasting and corrosion treatment methods, in which the corundum (including green silicon carbide) used for sandblasting has high strength and hardness, which has a strong impact on the pure titanium surface and will destroy the thread shape of the implant surface. Moreover, the mosaic of sandblasting particles on the surface of the material is serious, which has a great impact on the subsequent corrosion treatment.

The treatment process of the above three schemes is relatively complicated, all of which are corroded by multiple acids, and the treatment time is long, the production efficiency is low, it is easy to cause hydrogen embrittlement, and the cost is high