KR20110018655A - Implant forming silver coating layer and forming method of silver coating layer - Google Patents

Abstract

PURPOSE: An implant forming silver coating layer and a forming method of a silver coating layer are provided to prevent harmful microorganism by forming a silver coating layer on the surface of an implant. CONSTITUTION: An implant having silver coating layer is formed on a apparatus for an implant which is comprised of titanium or titanium alloy. The silver coating layer(60) includes silver particles for antibiotic. An adhesive member is arranged on the silver coating layer to increase the bond force between silver particles and the silver coating layer.

Description

Implant forming silver coating layer and forming method of silver coating layer

The present invention relates to an implant and a method for forming a silver coating film formed of a silver coating film, and more particularly, in forming a silver coating film for antimicrobial on a dental implant substrate by increasing the bonding strength of the silver particles bonded to the implant substrate is a silver coating film It relates to a rigidly formed implant and a method for forming a silver coating film.

Dental implants generally refer to the replacement of the missing natural tooth itself, or by tightening a screw-shaped artificial tooth fixture to the alveolar bone for a period of time to fuse with the bone and then to the abutment on it. It is a dental procedure that restores the original function of teeth by fixing prosthesis such as abutment and artificial teeth.

Conventional implants are formed with a screw thread formed on the outer circumferential surface and a hexagonal head protruding from the upper portion so as to be implanted in the alveolar bone, the insertion hole and the hexagonal groove portion penetrate each other in the upper and lower inner portions, and the stepped portion at the portion where the insertion hole and the hexagonal groove portion are in contact with each other. The abutment formed and the fixing screw in which the screw part is formed in the lower end of the head part in which the hexagonal wrench groove was recessed in the upper end are comprised.

The abutment of the conventional crown implant configured as described above is installed so that the hexagonal groove is inserted into the hexagonal head protruding from the upper end of the fixture embedded in the jawbone, and then the fixing screw is inserted into the insertion hole of the abutment. Inserted through the fastening tool, the screw part of the fixing screw is fastened to the fastening hole of the fixture so that the abutment is firmly fixed, and then artificial teeth are formed by dental cement on the upper outer peripheral surface of the abutment. Inserted and glued.

In the process of placing the dental implant in the jawbone periodontal disease caused by the infection of harmful microorganisms may occur, which may cause a secondary infection such as peri-implantitis.

On the other hand, if a repetitive chewing action using a conventional artificial tooth, the artificial tooth receives the lateral occlusal force formed by the other teeth that are interlocked with the artificial tooth, and the lateral occlusal force is a series of fixtures and abutments It generates a moment with the point of contact as the working point. At this time, this moment will repeatedly affect the fixing screw.

Due to the moment generated by the lateral occlusion force, the fastening screw holding the abutment is constantly affected, and thus the fastening state of the fastening screw begins to loosen, and as the fastening state of the fastening screw becomes loose. Since the butt flows, the artificial tooth is shaken.

The present invention has been made in order to solve the problems described above, and a silver coating film is formed on the surface of the implant to provide an implant and a method for forming a silver coating film formed with a silver coating film that can prevent infection of harmful microorganisms. have.

Another object of the present invention is to provide an implant and a method for forming a silver coating film to form a continuous and stable coating film so that the silver particles contained in the silver coating film is firmly bonded to the implant surface so that the silver coating film is not easily peeled off.

The implant formed with a silver coating film of the present invention for achieving the above object is formed on a substrate for implants made of titanium or titanium alloy and includes a silver coating film containing silver particles for antibacterial; And a bonding force increasing means provided in the silver coating film to increase the bonding strength of the silver particles to the substrate.

The bonding force increasing means is formed on the inner side of the silver coating film, characterized in that provided as a base layer bonded to the surface of the substrate.

The base layer is formed by including at least one metal selected from niobium, tantalum, zirconium, platinum, and titanium.

The bonding strength increasing means is at least one metal selected from niobium, tantalum, zirconium, platinum and titanium contained in the silver coating film to form an alloy with the silver particles, wherein the content of the silver particles in the silver coating film is 3 to It is characterized in that 5% by weight.

And a method for forming a silver coating film of the implant of the present invention for achieving the above object comprises a base layer forming step of forming a base layer on the surface of the implant substrate made of titanium or titanium alloy; And a silver coating film forming step of forming a silver coating film including silver particles for antibacterial on the outside of the base layer, wherein the base layer is formed of niobium to increase the binding force of the silver particles to the implant member. Tantalum, zirconium, platinum, characterized in that formed by including at least one metal selected from titanium.

The base layer forming step is to mount the substrate for the implant in a holder in the chamber and to install at least one target selected from the niobium, tantalum, zirconium, platinum, titanium as a cathode material, the pressure of 15mTorr, 25 ℃, 70A arc Arc discharging for 60 minutes under a negative power bias voltage of 200 V to form the base layer in nano or micro units on at least a portion of the surface of the substrate.

As described above, according to the present invention, by forming a silver coating film on the surface of the dental implant, inflammation of gingiva and alveolar bone tissue at the contact surface with the implant can be reduced, thereby reducing peri-implantitis and preventing bacterial infection.

In particular, the present invention serves to bond the base layer formed between the implant and the silver coating film so that the silver coating film is not easily peeled off from the implant can form a stable and stable silver coating film.

In addition, a silver coating film may be formed on the surface of the fixing screw to prevent loosening of the screw.

Hereinafter, an implant with a silver coating film according to a preferred embodiment of the present invention will be described in detail.

1 is a cross-sectional view illustrating a state in which an implant is implanted according to an embodiment of the present invention, and FIG. 2 is a partially cutaway perspective view illustrating an abutment applied to FIG. 1.

1 and 2, the dental implant 10 includes a fixture 20 largely placed in the alveolar bone 3, an abutment 30 coupled to an upper portion of the fixture 20, and a It consists of a fixing screw 40 for fixing the butt 30 to the fixture (20). And the upper part of the abutment (30) is combined with the artificial crown (5) is to reproduce the same shape and function as natural teeth.

In the present invention, the substrate for an implant means the fixture 20, the abutment 30, the fixing screw 40, and the artificial dental crown 5, which constitute the implant described above. The implant substrate is made of pure titanium or titanium alloy to improve bone fusion.

Titanium alloys are other metals in titanium, for example aluminum (Al), tantalum (Ta), niobium (Nb), vanadium (V), zirconium (Zr), platinum (Pt), palladium (Pd), yttrium (Yt) , At least one metal of magnesium (Mg), tin (Sn), and molybdenum (Mo) is added. More specifically, for example, Ti-6Al-4V, Ti-6Al-7Nb, Ti-30Nb, Ti-13Nb-13zr, Ti-15Mo, Ti-35.3Nb-5.1Ta-7.1Zr, Ti-29Nb-13Ta- 4.6Zr, Ti-29Nb-13Ta-2Sn, Ti-29Nb-13Ta-4.6Sn, Ti-29Nb-13Ta-6Sn, Ti-16Nb-13Ta-4Mo.

Hereinafter, as an example, the base layer 50 is formed on the surface of the abutment 30, and the silver coating layer 60 is formed outside the base layer 50.

The silver coating film 60 formed on the abutment 30 serves to suppress the propagation of harmful microorganisms. In this case, the silver coating layer 60 may be formed of pure silver or silver alloy. The silver alloy may comprise silver at least one selected from other metals, for example tantalum, niobium, vanadium, zirconium, platinum, palladium, yttrium, magnesium and titanium. In addition to the sterilization and antimicrobial ceramic material may be further mixed. The silver coating layer 60 may be formed to be limited to at least a portion of the surface of the abutment 30, preferably the surface in contact with the alveolar bone 3.

The silver coating film 60 is formed to a thickness of nano or micro units on at least a portion of the surface of the abutment by using physical vapor deposition (PVD). Preferably, an arc ion plating method is used. When the silver coating film is formed by the arc ion plating method, the film formation speed is fast and the adhesion is excellent. In addition, vacuum deposition, sputtering, low temperature plasma, chemical vapor deposition (CVD), etc. may be used.

The base layer 50 is formed inside the silver coating film 60, that is, between the abutment 30 and the silver coating film 60. The base layer 50 increases the bonding force that the silver particles contained in the silver coating film 60 is bonded to the surface of the abutment 30.

In the present invention, the base layer 50 has good bonding strength with silver particles, and should have corrosion resistance, abrasion resistance, and the like, and good biocompatibility. In view of this, the base layer 50 is formed by including at least one metal selected from niobium, tantalum, zirconium, platinum, and titanium. The base layer 50 is formed in nano or micro units on at least a part of the surface of the abutment 30 by using the same arc ion plating method as that of forming the silver coating film 60.

By the base layer 50, the silver coating layer 60 is firmly bonded to the abutment 30, so that the silver coating layer 60 is not easily peeled off. Therefore, to form a stable and stable silver coating film 60.

Another embodiment of the present invention is illustrated in FIG. 3. In the present invention illustrated in FIG. 3, the silver coating layer 70 is formed directly on the abutment 30 with the base layer omitted. In this case, the silver coating layer 70 may be formed of at least one selected from niobium, tantalum, zirconium, platinum, and titanium, which form an alloy with the particles, as a means for increasing the bonding force of the silver particles contained in the silver coating layer 70. Metal. In this case, at least one metal selected from niobium, tantalum, zirconium, platinum, and titanium allows the silver particles to be stably bonded to the implant substrate.

Preferably the content of silver particles in the silver coating film 70 is contained in 3 to 5% by weight. When the content of silver particles is less than 3% by weight, the antimicrobial effect of silver is insignificant, and when it exceeds 5% by weight, the bonding strength of the silver coating film is significantly lowered.

On the other hand, when the silver coating film is formed on the surface of the fixing screw 40 shown in Figure 1 can prevent the screw loosening phenomenon of the fixing screw 40 in addition to the antibacterial effect. The surface thickness of the fixing screw 40 is constantly increased by the silver coating film, and when the fixture 20 and the fixing screw 40 are fastened, the loosening phenomenon may be prevented due to the friction between the threads of the fixture 20 and the silver coating film. It becomes possible.

As described above, the implant with the silver coating film according to the embodiment of the present invention may be formed only on the surface of the abutment or fixture, and the silver alloy layer may be located only on the surface of the fixing screw. In addition, the implant according to an embodiment of the present invention may be a silver coating film on the surface of the abutment and the fixing screw, it may be formed on both the surface of the fixture, abutment, fixing screw.

Hereinafter, an implant and a silver coating film forming method according to an embodiment of the present invention will be described.

First, a dental implant base, such as an abutment or fixture, is prepared and the surface is washed. For example, the substrate is ultrasonically washed for 15 minutes in acetone and ethanol, and then washed with deionized water and dried. In addition, it may be cleaned by an ion cleaning method using argon gas.

Next, a base layer is formed on the surface of a base material. The base layer is formed on the surface of the substrate by an arc ion plating process. A base layer is formed through an arc ion plating process by using a target including one of niobium, tantalum, zirconium, platinum, and titanium on a substrate from which impurities are removed from the surface. The arc ion plating process is carried out for 10 to 120 minutes at a temperature of 200 to 400 ° C., with a arc power of 40 to 80 A, a bias voltage of 50 to 300 V, under an inert gas atmosphere of 30 to 300 sccm, under a pressure of 3 to 20 mTorr. Can be implemented.

And the sputtering process is carried out for 1 to 50 minutes at a temperature of 100 to 350 ℃, with a sputter power of 100 to 400 W, a bias voltage of 50 to 300 V, under an inert gas atmosphere of 10 to 50 sccm under a pressure of 3 to 20 mTorr Can be.

When the base layer is formed, a silver coating film including silver particles for antibacterial is formed on the outside of the base layer. The silver coating film may be formed using a known method, that is, low temperature plasma, chemical vapor deposition (CVD), physical vapor deposition (PVD), electrodeposition method, or the like. Among these, the same arc ion plating process as the method of forming the base layer is used.

As such, the present invention does not form a silver coating film directly on the surface of the implant substrate, but forms a silver coating film outside the base layer. In this case, the base layer formed between the implant and the silver coating film greatly increases the bonding strength of the silver coating film to the implant.

As another example of the present invention, the silver coating film is formed directly on the surface of the substrate of the implant without forming the base layer, and the silver coating film is formed to include niobium, tantalum, zirconium, platinum, and titanium metal. The silver coating film forms a silver coating film by using a target including any one of niobium, tantalum, zirconium, platinum, and titanium on silver on a substrate from which impurities are removed from the surface.

Hereinafter, an embodiment of the present invention will be described in more detail. However, embodiments according to the present invention may be modified in various other forms, the scope of the present invention is not limited to the embodiments described later.

Example 1

As an implant substrate, a pure titanium plate of 15 mm x 15 mm size was used. First, the titanium plate was ultrasonically washed for 15 minutes in acetone and ethanol, and then washed with deionized water and dried. And the titanium plate base material was mounted in the holder in the arc ion plating apparatus chamber. And argon and oxygen gas at 200 sccm Arc discharge was performed to form a base layer on the substrate. In this case the pressure in the chamber 7.5 mTorr, 350 ° C., current was 70 A, and niobium was used as the cathode material. In the arc discharge, a discharge experiment was performed by applying a negative potential bias voltage of 100 V to the holder.

Then, pure silver was used as the negative electrode material, and then discharged under the same conditions as those of forming the base layer to form a silver coated film.

Example 2

The silver coating film was formed on the surface of the titanium substrate in the same manner as the base layer forming method applied to Example 1. However, a silver-niobium alloy containing 4% by weight of silver was used as the negative electrode material.

(Comparative Example)

The silver coating film was formed on the surface of the titanium substrate in the same manner as the base layer forming method applied to Example 1. Pure silver was used as the negative electrode material.

Experimental Example 1: Adhesion Test

Adhesion to the titanium substrate of the silver coating film formed in Example 1 and Example 2, Comparative Example was measured by a scratch tester (RB311, R & B), the results are shown in Table 1 below.

division Adhesive force (N) Example 1 21 Example 2 22 Comparative example 8

From the results of Table 1, the implant according to the embodiment of the present invention can be seen that the adhesion is significantly improved compared to the comparative example. Therefore, it can be seen that the effect of the silver coating film can be sustained for a long time.

Experimental Example 2: Antibacterial Test

In order to evaluate the antimicrobial activity of Example 1, Aggregatilacter actinomycetemcomitans ATCC 33384 (Aa) anaerobes and a representative tooth decay bacterium, Porphyromonas gingivalis (Pg) aerobic bacteria were used. The culture solution for anaerobes was prepared by adding 30 g of tryptic soy broth and 1 g of yeast extract per liter and adding sterilized 100 ml of fetal bovine serum when the temperature of the broth was lowered below 50 ° C. The culture solution for aerobic bacteria was used after sterilization by adding lactose (BD / Difco Laboratories, Sparks, Md., USA) to 25 g and 10% of BactoTM heart infusiion broth (BHI) per liter. 4 ml of the prepared culture solution was added to a 50 ml cornical tube, and the sterilized sample 1 was added thereto. 100 μl (about 1 × 10 8 CFU / mL; colony forming unit / mL) was taken when the absorbance of the cultured bacteria was 0.5 at 630 nm and inoculated into the culture solution containing the specimen. After incubation in an anaerobic or aerobic incubator at 37 ° C., 0.2 ml of each sample was taken every 2 hours, and the antimicrobial test was performed by measuring the absorbance value of 630 nm using a spectrophotometer (Bio-Tek Instruments, USA). The results are shown in FIGS. 4 and 5.

4 and 5, in the case of the specimen of Example 1 it can be seen that the antimicrobial ability against the Aa and Pg bacteria significantly improved compared to the control.

Experimental Example 3: Removal Torque Test

In this experimental example, the silver coating film was formed on the fixing screw fixing the abutment in the same manner as in Example 2, and then the fastening torque value was measured after fastening to the fixture. Specifically, after fastening the 1.2 Hand Driver to the digital torque meter (MARK-10, USA), fix the fixture to the collet check tightly and apply a force of 35 Ncm to prevent idling due to rotational force. After fastening the fixing screw to the fixture, the loosening torque was measured in a counterclockwise direction (CCW). Tightening and loosening as described above three times after the repeated fatigue test was tested for removal. As a control, a conventional fixing screw having no silver ion coating film was used.

The results for the torque test are shown in Table 2 below.

division Fastening direction
(cw) / Ncm Removal test after fatigue test
(ccw) / Ncm Test 35.0 29.5 (84%) Control 35.0 25.10 (71%)

Looking at the results of Table 2, the loosening torque value of the test sphere was found to be 29.5Ncm, about 84% of the tightening torque value. On the contrary, in the control group, the loosening torque value was 25.10Ncm, which is about 71% of the tightening torque value, indicating that the loosening torque value was significantly lower than that in the control group.

Therefore, the present invention is expected to be able to improve the shaking of the artificial teeth because the fixing screw for fixing the abutment to some extent prevents loosening.

In the above, the present invention has been described with reference to one embodiment, which is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible.

Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

1 is a cross-sectional view showing a state in which the implant according to an embodiment of the present invention,

2 is a partially cutaway perspective view illustrating the abutment applied to FIG. 1.

<Description of the symbols for the main parts of the drawings>

3: alveolar bone 20: fixture

30: abutment 40: fixed screw

50: base layer 60: silver coating film

Claims (6)

A silver coating film formed on the substrate for implants made of titanium or titanium alloy and including silver particles for antibacterial activity; And a bonding force increasing means provided in the silver coating film to increase the bonding strength of the silver particles to the substrate. The implant of claim 1, wherein the bonding force increasing means is formed as an inner layer formed inside the silver coating layer and bonded to the surface of the substrate. The implant of claim 2, wherein the base layer is formed of at least one metal selected from niobium, tantalum, zirconium, platinum, and titanium. The method of claim 1, wherein the bonding means is at least one metal selected from niobium, tantalum, zirconium, platinum, titanium contained in the silver coating film to form an alloy with the silver particles, The silver coating film is implanted, characterized in that the content of the silver particles in the silver coating film is 3 to 5% by weight. A base layer forming step of forming a base layer on a surface of an implant substrate made of titanium or a titanium alloy; And a silver coating film forming step of forming a silver coating film including silver particles for antibacterial on the outside of the base layer. In the base layer forming step, the base layer is formed of at least one metal selected from niobium, tantalum, zirconium, platinum, and titanium to increase the bonding strength of the silver particles to the implant member. Formation method. The method of claim 5, wherein the base layer forming step comprises mounting the substrate for the implant in a holder in the chamber and installing at least one target selected from niobium, tantalum, zirconium, platinum, and titanium as a negative electrode material, and then pressure 7.5mTorr. , The silver of the implant to form the base layer in nano or micro units on at least a portion of the surface of the substrate by arc discharge for 60 minutes at 350 ° C., 70 A arc power, 100 V negative potential bias voltage condition. Coating film formation method.

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