KR101737358B1 - Surface treated Method of Dental implants using plasma electrolytic oxidation - Google Patents

Abstract

The present invention relates to a method of surface treatment of a dental implant, and more particularly, to a plasma electrolytic oxidation method capable of increasing corrosion resistance and wear resistance and improving biocompatibility by surface-treating a dental implant using a plasma electrolytic oxidation method To a method for surface treatment of dental implants using the same.

Description

TECHNICAL FIELD [0001] The present invention relates to a surface treatment method of a dental implant using a plasma electrolytic oxidation method,

The present invention relates to a method of surface treatment of a dental implant, and more particularly, to a plasma electrolytic oxidation method capable of increasing corrosion resistance and wear resistance and improving biocompatibility by surface-treating a dental implant using a plasma electrolytic oxidation method To a method for surface treatment of dental implants using the same.

Generally, dental implants mechanically process titanium or titanium alloys and then perform a variety of surface treatment processes to improve the intraosseous fit of the implant.

Conventional dental implant surface treatment methods include acid etching, plasma spraying, ion implantation, thermal oxidation, sol-gel coating, physical vapor deposition (PVD), and electrochemical deposition have.

However, in the case of an implant surface treated with an acid etching method, an inflammation reaction occurs due to the acid remaining on the surface, or corrosion occurs on the surface of the implant, thereby causing clinical problems.

Plasma spraying is a method commonly used to coat bioceramics commercially on commercial occasions. However, plasma spraying is a method commonly used for coating commercially available bioceramics on an implant, but also involves microcracks, low bonding strength between the coating layer and the implant surface, phase change due to exposure at high temperatures, Irregular fine structure control, and the like.

In addition, the electrochemical vapor deposition method has a weak binding force between a coating layer formed by coating titanium or a titanium alloy with calcium phosphate or hydroxyapatite and an implant (a titanium or a titanium alloy), resulting in peeling from the implant or an interface between the implant and the coating layer, There is a problem that chronic inflammation occurs in the bone tissue around the implant due to biodegradation,

That is, the conventional surface treatment methods of implants have a serious problem that they are derived as a result of implant failure due to weak adhesion force of the coating layer and peeling from the implant and poor biocompatibility.

1. Korean Patent No. 10-1188443, an implant including an anion exchanged anodized surface and a method for manufacturing the same. 2. Korean Patent Laid-Open No. 10-2015-0111814, a method for manufacturing a titanium-containing implant using an environmentally friendly etching composition.

SUMMARY OF THE INVENTION The present invention has been conceived to solve such a problem, and an object of the present invention is to provide a dental implant which is surface treated so as to form an oxide film layer on a surface of a dental implant by a plasma electrolytic oxidation method, To provide a method for surface treatment of a dental implant capable of improving the bonding force of the coating layer and ensuring excellent corrosion resistance and wear resistance.

It is another object of the present invention to provide a method for surface treatment of a dental implant that can increase biocompatibility by forming an oxide coating layer containing magnesium, calcium and phosphorus on the surface of the implant.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a dental implant comprising: preparing a dental implant; Supporting the implant in an electrolytic solution, and connecting the implant to a plasma electrolytic oxidation apparatus; And applying a pulse current to the plasma electrolytic oxidation apparatus to form an oxide film on the surface of the implant.

In a preferred embodiment, the electrolytic solution comprises magnesium, calcium and phosphorus.

In a preferred embodiment, the electrolytic solution comprises calcium acetate, magnesium acetate and calcium glycerophosphate.

In a preferred embodiment, the electrolytic solution comprises 26.7 g / l calcium acetate and 4.3 g / l calcium glycerophosphate.

In a preferred embodiment, the concentration of the magnesium acetate in the electrolytic solution is 5 mol% to 20 mol% based on the calcium acetate.

In a preferred embodiment, the implant is a metal of titanium alloy or titanium.

The present invention further provides a dental implant characterized by being manufactured by the surface treatment method of the implant of the present invention.

In a preferred embodiment, micro-sized pores are formed on the surface of the implant.

In a preferred embodiment, an oxide film containing magnesium, calcium and phosphorus is formed on the surface of the implant.

In a preferred embodiment, the magnesium is formed at a concentration of 5 mol% to 20 mol% of the calcium.

The present invention has the following excellent effects.

According to the surface treatment method of a dental implant of the present invention, surface treatment is performed so that an oxide film layer is formed on the surface of a dental implant using a plasma electrolytic oxidation method, thereby improving the bonding force of the oxide film formed on the surface of the implant, Corrosion resistance and abrasion resistance can be secured.

In addition, according to the surface treatment method of the dental implant of the present invention, an oxide film layer containing magnesium, calcium, and phosphorus, which are elements constituting the bone, is formed, thereby increasing the biocompatibility.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a method of surface treatment of a dental implant according to the present invention; FIG.
2 is a scanning electron microscope (X50, X500) photograph of a dental implant treated with the method of surface treatment of a dental implant according to the present invention.
3 is a scanning electron microscope (X1000) photograph of a dental implant treated with the method of surface treatment of a dental implant according to the present invention.
FIG. 4 is a graph showing an EDS result of a dental implant treated by the surface treatment method of the dental implant according to the present invention.
FIG. 5 is a view showing an EDS mapping result of a dental implant treated by a surface treatment method of a dental implant according to the present invention.
6 is an electron micrograph showing apatite formed on a surface of a dental implant treated with the surface treatment method of the dental implant according to the present invention after immersing the dental implant in a bioactive solution.

Although the terms used in the present invention have been selected as general terms that are widely used at present, there are some terms selected arbitrarily by the applicant in a specific case. In this case, the meaning described or used in the detailed description part of the invention The meaning must be grasped.

Hereinafter, the technical structure of the present invention will be described in detail with reference to preferred embodiments shown in the accompanying drawings.

However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Like reference numerals designate like elements throughout the specification.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a method of surface treatment of a dental implant according to the present invention; FIG.

Referring to FIG. 1, a surface treatment method of a dental implant according to an embodiment of the present invention is a surface treatment method for forming an oxide film on a surface of a dental implant using a plasma electrolytic oxidation method. First, a dental implant is prepared Is performed (S1000).

Here, the dental implant is made of a titanium alloy or a titanium material.

In addition, the shape of the dental implant is a screw shape, and the specific shape can be easily changed into various shapes to be connected to the design direction of the maker or the oral condition of the examinee.

Next, the prepared implant is supported on the electrolytic solution, and the step of connecting the implant to the plasma electrolytic oxidation apparatus is performed (S2000).

Here, the electrolytic solution is preferably a solution containing magnesium, calcium and phosphorus.

This is because the oxide film formed on the surface of the implant includes magnesium, calcium and phosphorus, which constitute bone components, thereby improving the formation of apatite and thereby increasing biocompatibility.

More specifically, the electrolytic solution may be a solution containing ginseng salts with calcium acetate, magnesium acetate, and calcium glycerol.

The electrolytic solution also contained 26.7 g / l calcium acetate and 4.3 g / l calcium glycerophosphate.

It is preferable that the concentration of the magnesium in the electrolytic solution is 5 mol% to 20 mol% based on the calcium.

Next, a pulse current is applied to the plasma electrolytic oxidation apparatus to form an oxide film on the surface of the implant (S3000)

That is, the surface treatment method of a dental implant according to the present invention is a technique for forming an oxide film containing magnesium, calcium and phosphorus on the surface of a dental implant.

This makes it possible to drastically reduce the processing cost and manufacturing cost in comparison with the conventional blasting or plasma spraying techniques by forming the oxide film on the surface by a simple process and improve the bonding force between the surface of the implant and the oxide film layer In addition, corrosion resistance and abrasion resistance are improved.

Also, it is possible to form a porous oxide film having a micro-sized diameter which is excellent in binding force with the implant, and the oxide film includes magnesium, calcium and phosphorus as effective ingredients for improving induction of bone formation, thereby improving biocompatibility .

The present invention further provides a dental implant manufactured by the surface treatment method of an implant according to the present invention.

Also, an oxide film containing magnesium, calcium and phosphorus is formed on the surface of the implant.

2 is a scanning electron microscope (SEM) image of a dental implant treated with the method of surface treatment of a dental implant according to the present invention.

Referring to FIG. 2, the oxide film formed on the surface of the implant is crystallized while micro-sized pores are formed.

Here, the size of the pores is about 1 μM.

It is preferable that magnesium of the oxide film is in a concentration of 5 mol% to 20 mol% of the calcium.

Example 1

Titanium alloy implants were prepared.

After the prepared implant was supported on the electrolytic solution, the implant was connected to a plasma electrolytic oxidation apparatus.

Then, a pulse current was applied at a normal temperature condition through a plasma electrolytic oxidation apparatus to form an oxide film on the surface of the implant, and Example 1 was obtained.

At this time, the electrolytic solution was prepared by adding calcium acetate, magnesium acetate, and calcium glyceride to the third distilled water, and then homogenizing the solution through sufficient agitation.

The concentration of magnesium acetate was adjusted to 5 mol% based on calcium acetate.

 Example 2

Example 2 was prepared and obtained in the same manner as in Example 1, except that the concentration of magnesium acetate in the electrolytic solution was adjusted to 10 mol% with respect to calcium acetate.

Example 3

Example 3 was prepared and obtained in the same manner as in Example 1, except that the concentration of magnesium acetate in the electrolytic solution was adjusted to 20 mol% based on calcium acetate.

Experimental Example 1

Examples 1 to 3 were observed under a scanning microscope, and the results are shown in FIG.

As shown in FIG. 3, it can be seen that pores having a diameter of about 1 μM are formed in all of Examples 1 to 3. FIG.

Experimental Example 2

EDS analysis was performed to confirm the changes in the components of Examples 1 to 3, and the result thereof is shown in FIG.

As shown in FIG. 4, it can be seen that the components of magnesium, calcium and phosphorus used in the electrolytic solution were well formed as oxide films in Examples 1 to 3.

Experimental Example 3

EDS mapping analysis was performed to observe the distribution of calcium, magnesium and phosphorus on the surfaces of Examples 1 to 3, and the results are shown in FIG.

As shown in FIG. 5, calcium, magnesium, and phosphorus components are uniformly distributed throughout the surface of the implant.

Experimental Example 4

In order to evaluate bone formation ability, Examples 1 to 3 were immersed in a bio-similar solution for 7 days, and apatite to be formed was confirmed using a scanning electron microscope, and the results are shown in FIG.

At this time, the bio-similar solution is ^{Na + 142.0, K + 5.0,} Ca 2 + 2.5, Mg 2 + 1.5, Cl - produced _{^{147.8, HCO -3, HPO 2 -4}} 1.0, SO 2 -4 so as to have a concentration of 0.5 mM And were reacted under conditions of 36.5 ° C ± 1 ° C and pH 7.4 similar to the oral environment.

As shown in FIG. 6, bone structure performance was observed using a bioactive solution immersion method. As a result, it was confirmed that apatite was easily formed in all of Examples 1 to 3 of the present invention, It can be confirmed that apatite is formed most excellently.

As described above, the surface treatment method of a dental implant according to the present invention can form a porous surface layer containing magnesium, calcium and phosphorus through a simple plasma electrolytic oxidation process, thereby forming a dental implant surface having excellent bone structure performance have.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, Various changes and modifications will be possible.

Claims (10)

Preparing a dental implant;
Supporting the implant in an electrolytic solution containing calcium acetate, magnesium acetate and calcium glycerophosphate, and connecting the implant to a plasma electrolytic oxidation apparatus;
And applying a pulse current to the plasma electrolytic oxidation apparatus to form an oxide film on the surface of the implant,
Wherein the electrolytic solution contains 5mol% to 20mol% of magnesium acetate as the concentration of calcium acetate, thereby improving the formation of apatite.
delete delete The method according to claim 1,
The electrolytic solution
26.7 g / l of calcium acetate and 4.3 g / l of calcium glycerophosphate.
delete The method according to claim 1,
The implant
Titanium alloy or titanium metal. ≪ RTI ID = 0.0 > 11. < / RTI >
A method for surface treatment of an implant according to any one of claims 1, 4, and 6, wherein micro-sized pores are formed on the surface, and an oxide film containing magnesium, calcium and phosphorus is formed, And the concentration of calcium is 5 mol% to 20 mol%.
delete delete delete

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