Bioactive coating of metal implant and preparation method thereof

Abstract

The invention discloses a bioactive coating of a metal implant and a preparation method thereof. According to the invention, a medical metal implant subjected to deoiling and derusting is utilized as a positive pole to be subjected to micro-arc oxidation in a special micro-arc oxidation treatment liquid under the conditions that titanium or aluminum is used as a positive pole, stainless steel groove is used as a negative pole, direct current impulse micro-arc oxidation equipment is adopted, the current density is controlled at 2-4A / cm<2>, the duty ratio is 10-20%, and the time is 10-20 minutes; and the medical metal implant subjected to micro-arc oxidation is washed with deionized water and then naturally dried, so as to obtain the medical metal implant with the bioactive coating. Compared with the bioactive coating obtained by other methods, the bioactive coating prepared by the method disclosed by the invention has simple process and rapid bioactive coating growth speed, and is superior to the bioactive coatings prepared in the prior art in the aspects of growth efficiency of the bioactive coating, combination strength of the bioactive coating and the metal implant and the like.

Description

Technical field [0001] Background technique [0002] [0003] [0004] [0005] [0006] [0007] [0008] [0009] [0010] Invention content [0011] [0012] The technical solution of the present invention [0013] [0014] [0015] [0016] [0017] [0018] [0019] 2 [0020] The beneficial effect of the present invention [0021] [0022] Attachment description [0023] figure 1 [0024] figure 2 Detailed ways [0025] The following is further elaborated by the embodiments and combined with the attachment, but the present invention is not limited. [0026] [0027] [0028] [0029] [0030] [0031] [0032] [0033] [0034] Example 1 [0035] [0036] [0037] [0038] [0039] [0040]The medical metal implant, the Ti-6AL-4V plate of 10 × 10 × 2mm, soaked 5min in a 10%NAOH aqueous solution at 70 ° C for 5 minutes for oil removal. It contains 5%HF acid and 5%HNO 3 Water solution removal of 3min; [0041] (3) Place the steps (2) The pre-processing Ti-6AL-4V board ...

AI Technical Summary

Problems solved by technology

However, the disadvantages of the plasma spraying method: the high temperature during the spraying process leads to partial deterioration of the coated active coating, cannot form a firm bond with the substrate, and is prone to degradation in body fluids, etc.

However, since the calcium and phosphorus in the hydrothermal treatment of synthetic hydroxyapatite come from the micro-arc oxidation film layer, the source of calcium and phosphorus is very small, and the formed hydroxyapatite is very limited

[0010] Although there have been reports on the preparation of active layers on metals by micro-arc oxidation, the micro-arc oxidation formula generally does not add calcium salts, and the formulas that add calcium and phosphorus only add calcium and phosphorus salts.

The above two formulations have disadvantages for the preparation of the active layer

The active layer formed by the formulation without calcium and phosphorus is not bioactive enough

However, the formula that only adds calcium and phosphate salts will form a large amount of calcium phosphate to precipitate, resulting in a very low concentration of conductive ions in the solution, which is not conducive to the growth of oxide film

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