Metal implant and surface processing method thereof

Abstract

The invention discloses a metal implant. A plurality of micro-grade concave holes are formed on the surface of the metal implant and are internally provided with a plurality of submicro-grade concave holes, wherein the apertures of the micro-grade concave holes are between 1mu m and 100mu m; the apertures of the submicro-grade concave holes are between 100nm and 1000nm; and the surface average roughness of the metal implant is between 0.1mu m and 5mu m.

Description

technical field [0001] The invention relates to a metal implant and a surface treatment method thereof, in particular to a metal implant with a surface shape of a large cavity with small cavities and a surface treatment method thereof. Background technique [0002] At present, there are many methods for forming a porous structure on the surface of metal implants, such as sand blasting or acid etching, through which the surface of metal implants can be roughened. The degree of increase is beneficial to the cell attachment after the metal implant is implanted in the organism and shortens the wound healing time. [0003] For example, U.S. Patent No. US5456723 discloses a surface treatment method for metal implants. The treatment step is to use a diamond sand with a particle size of 250-500 μm for sandblasting, and then use high-temperature sulfuric acid (H 2 SO 4 ) / hydrochloric acid (HCl) mixed solution for acid etching to roughen the surface of the metal implant. [0004] H...

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Problems solved by technology

[0006] However, the acid used above is hydrofluoric acid, and those who are familiar with the chemical of hydrofluoric acid know that hydrofluoric acid is an extremely dangerous chemical, such as: hydrofluoric acid can pass through the mouth, nose, eyes or skin, etc. Enter the human body through the pathway, causing severe systemic poisoning symptoms such as hypocalcemia, hypomagnesemia, pulmonary edema, metabolic acidosis, ventricular arrhythmia, and even death

In addition, the second acid solution is a mixed solution of sulfuric acid / hydrochloric acid, which will produce a violent exothermic dehydration reaction during preparation, which will easily cause burns to the operator

[0007] It can be seen from the above that if the current common surface treatment methods for metal implants do not use large-grain sandblasting to destroy the thread shape of the metal implants, they use multiple acid etching steps or use dangerous In order to increase the surface roughness, however, in fact, the use of the above methods all hides the chance of dangerous harm to the human body

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