Preparation method of biological gradient coating on surface of dental implant

A dental implant and gradient coating technology, applied in the field of biomedicine, can solve the problems that the coating cannot meet the bonding strength, biological activity and solubility at the same time, and the coating can not meet the clinical needs, so as to enhance chemical stability and bonding force, thermal stress relaxation, and bond strength increase

Inactive Publication Date: 2014-02-26
温州医科大学附属口腔医院
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Problems solved by technology

However, these studies have not changed the essence of single-character coatings, and cannot meet the requirements of coatings in terms of binding strength, biological activity, and solubility.
With the increasing clinical requirements for implants and the continuous development of biomaterials research, a single coating can no longer meet clinical needs. It is necessary to obtain ideal biological activity, solubility, Mechanical properties and bond strength are almost impossible

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  • Preparation method of biological gradient coating on surface of dental implant

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Embodiment Construction

[0029] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] Such as figure 1 Shown is a specific embodiment of the preparation method of the biogradient coating on the surface of the dental implant of the present invention. This embodiment includes a dental implant, and the following steps are performed on the dental implant:

[0031] In the first step, the titanium sheet is polished with SiC metallographic sandpaper, cleaned and dried, and then placed on the surface of the dental implant to form a titanium base layer;

[0032] The second step is to prepare La-HA / TiO on the surface of the titanium base layer 2 Composite coating, generating gradient TiO 2 / La-HA=(100-x) / x, where x=20~80, the interval of x is 20, that is, the value of x is preferably 20, 40, 60, 80, to realize the gradient of the thermal expansion coefficient and elastic modulus of the coating transition;

[0033] The third s...

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Abstract

The invention discloses a preparation method of a biological gradient coating on the surface of a dental implant. The method is used for performing operation of the following steps on the dental implant: polishing a titanium sheet by SiC metallographic abrasive paper, cleaning, drying, and setting the dried titanium sheet on the surface of the dental implant to form a titanium substrate layer; preparing an La-HA/TiO2 composite coating on the surface of the titanium substrate layer; preparing an HA coating on the surface of the La-HA/TiO2 composite coating; and setting the dental implant in an apatite/collagen solution containing La, thus forming the apatite/collagen coating on the surface of the dental implant. According to the invention, the La-HA/TiO2 composite coating is prepared on the titanium surface, so that the excessively high solubility of the HA coating is effectively lowered, the problem of instability between original HA and a metal interface is solved, and the chemical stability and the bonding force of the coating are improved; with the novel coating design, the biological activity and the solubility are improved in a gradient way from inside to outside, and the chemical stability and the bonding strength are improved in a gradient way from outside to inside.

Description

technical field [0001] The invention relates to the field of biomedicine, in particular to a method for preparing a biogradient coating on the surface of a dental implant. Background technique [0002] Titanium has good mechanical properties and biocompatibility, and is a commonly used metal implant material in biomedicine. However, the biological activity of titanium is poor, and the combination with the surrounding bone tissue after implantation in the body is only a mechanical fit, which cannot form effective osseointegration, and it is prone to loosening and falling off after implantation in the body. Therefore, the modification of the surface of titanium implants has become a hot spot in the research of biomaterials in recent years. Among them, hydroxyapatite bioceramics (hydroxyapatite, referred to as HA), which has similar chemical composition and crystal structure to human bone inorganic substances, is widely used on the surface of titanium metal due to its excellen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61C8/00A61L27/42A61L27/32A61L27/34A61L27/54C23C20/08
Inventor 刘劲松徐丽华董伊雯金逸凡楼维维
Owner 温州医科大学附属口腔医院
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