Technology for uniform deposition of HA (hydroxyapatite) coatings on medical porous titanium and titanium alloy

A technology of hydroxyapatite and titanium alloy, which is applied in the field of surface modification treatment of medical materials, can solve problems such as uneven surface quality and uneven surface modification of porous metals, so as to avoid process asynchrony and improve electrochemical reaction The effect of mass transfer capacity

CN105624753AActive Publication Date: 2016-06-01GUANGZHOU INST OF ADVANCED TECH CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2016-06-01

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Abstract

The invention relates to the field of surface modification treatment of medical materials and particularly discloses a technology for uniform deposition of HA (hydroxyapatite) coatings on medical porous titanium and titanium alloy. The technology for deposition of the HA coatings on the porous titanium and titanium alloy comprises processes including pretreatment of a porous metal base material, preparation of an electroplating solution and electro-deposition. In the pretreatment process, effective mechanical grinding and cleaning treatment can be performed on inner and outer surfaces of porous metal; in the electro-deposition process, HA electro-deposition treatment can be performed on the porous metal by using a rotating electrode electrolysis device, the thickness of diffusion layers on the inner and outer surfaces of the porous metal can be effectively reduced, and the problem that electro-deposition technologies of inner and outer surfaces of a porous structure are not synchronous can be effectively solved under the diffusion mixing controlled condition; uniform HA electro-deposition layers on the inner and outer surfaces of the porous metal are obtained by adjusting the rotating speed.
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Description

technical field

[0001] The invention relates to the field of surface modification treatment of medical materials, in particular to a process for uniformly depositing hydroxyapatite coatings on medical porous titanium and titanium alloys. Background technique

[0002] It is a current trend that porous metals are used in orthopedic clinics such as the treatment of osteonecrosis and bone defects. The results of clinical trials show that even implant materials with only porous surfaces can significantly improve the histocompatibility of materials, which is mainly manifested in the greatly improved bonding ability and bonding strength of porous materials with bone tissue and fibrous tissue . From the perspective of biomechanics, the advantages of porous titanium or titanium alloy bone implants are very obvious: by adjusting the thickness of the scaffold, porous titanium alloys with different porosity, pore diameter and distribution can be produced to meet the support requirement...

Examples

Embodiment

[0038] The uniform deposition process of hydroxyapatite coating on medical porous titanium and titanium alloy of the present invention comprises:

[0039] Step 1: Pretreatment of Porous Metal Substrates

[0040] (1) Mechanical polishing: Use the automatic mode of the drum sandblasting machine to mechanically polish the inner and outer surfaces of porous titanium or titanium alloy samples. Brown corundum or white corundum with a particle size of 100-280 is used as sandblasting abrasive, and sandblasting is performed for 1-5 minutes to remove irregular burrs during the forming process of the inner and outer surfaces of the porous structure;

[0041] (2) Degreasing: Then place the mechanically polished porous titanium or titanium alloy sample in a hot alkali degreasing solution at 70-90°C for 2 to 10 minutes under supergene conditions, then take out the sample and rinse it with deionized water clean. The hot alkali degreasing liquid is 20~40g·L -1 NaH 2 PO 2 ·H 2 O, 10~20g·...