KR101169946B1 - Dental restoration material and biomaterial for medical use - Google Patents

Abstract

The present invention relates to a tooth restorative material that can easily apply aesthetic inverted powder (ceramic) by modifying the surface of an existing alloy-based, especially Ti-6Al-4V-based medical alloy, and improves the bonding force between the alloy and the inverted powder. After coating the surface of the metal base material made of -6Al-4V-based alloy with an oxide film formed by plasma electro-oxidation (PEO), the ceramic green sheet molded by a method such as a doctor blade is adhered thereto. Coated or coated with a ceramic slurry.

As a result, the bonding force between the interface between the alloy and the ceramics can be significantly improved, and it has a higher strength than the conventional ceramic restorative material, and has a specific gravity lower than that of the gold alloy restorative material, thereby providing excellent durability and light tooth restorative material. .

In addition, by having the same color and texture as the teeth of the human body, it is excellent in aesthetic, and can replace the expensive tooth restoring material provided with a gold alloy, such as to reduce unnecessary use of precious metals and at the same time can implement a dental restoration excellent in economical efficiency.

Teeth, Restorative Materials, Anodized

Description

Dental restorations and medical biomaterials {DENTAL RESTORATION MATERIAL AND BIOMATERIAL FOR MEDICAL USE}

The present invention relates to a dental restorative material and a medical biomaterial, and more particularly, an oxide film formed by plasma electrooxidation (PEO) is coated on a surface of a metal base material formed of a titanium (Ti) -based alloy. After forming, the ceramic powder or the ceramic green sheet is bonded and then sintered.

This significantly improves the bonding strength between the interface between the alloy and the ceramic and at the same time has a higher strength than the conventional ceramic restorative material, and has a lower specific gravity than the gold alloy restorative material. It relates to aesthetically superior tooth restorative material.

In particular, by applying a ceramic green sheet or a slurry on the PEO-treated surface, the strength of the bonding interface is increased, which is applicable to implant materials and medical biomaterials.

In general, dental prosthetic materials are mainly made of gold alloys having excellent durability, but inverted powders or polymers are also used for the increase of gold prices and aesthetic tooth restoration.

Here, it is true that the material made of the inverted powder or the polymer system is disadvantageous compared with the metal alloy material in terms of strength and durability.

On the other hand, in the case of the tooth restorative, conventionally, after the same shape as the tooth was produced, a mold for this shape was made, and a molten alloy was injected into the mold to mold the tooth restorative material.

However, recently, tooth restorations have been manufactured using simple devices or using 3D CAD / CAM.

Here, the material used to implement the shape of the tooth in the replica or three-dimensional CAD / CAM in the form of a zirconia ceramic block, etc., titanium (Ti) -based alloy is also used.

In this case, the zirconia ceramic block has a disadvantage of being broken during processing due to the rigidity of the ceramic.

In addition, in the case of the titanium (Ti) alloy, there is a functional disadvantage that the ceramic coating is difficult, the bonding strength is weak at the interface with the ceramic, and there is an aesthetic disadvantage that the titanium (Ti) alloy is mainly black.

In addition, sandblasting, chemical etching, anodizing, and the like have been mobilized to increase the bonding strength between the alloy system and the ceramic.

However, the above methods still have problems in the bonding force between the alloy and the ceramic, and there is a problem in that disinfection and post-treatment of the residues remaining in the restorative material are required.

In addition, recently, a method of forming a ceramic surface simply by fabricating an unsintered ceramic green sheet by a method such as a doctor blade and then wrapping and sintering the alloy restorative material has been proposed.

However, this also has a problem that the chemical bond between the alloy and the ceramic is different from each other as a metal bond and a covalent or ionic bond, the interface is unstable and the bonding strength is reduced.

On the other hand, there is a problem described above also in medical biomaterials such as prostheses connecting the human bone tissue.

The present invention was created to solve the above problems, and an object of the present invention is to form an oxide film formed by a plasma electrolytic oxidation method on a titanium (Ti) alloy, thereby significantly reducing the bonding force between the interface of the alloy and the ceramic. To provide a dental restoration and medical biomaterial that can be improved.

Still another object of the present invention is to provide a light dental restoration and a medical biomaterial having a higher strength than the conventional ceramic restoration, having a higher durability and a lower specific gravity than the gold alloy restoration.

Still another object of the present invention is to provide an aesthetically superior tooth restorative material having the same color and texture as the teeth of the human body.

It is still another object of the present invention to provide an expensive dental restorative material having excellent economical efficiency while reducing unnecessary use of precious metals by replacing expensive dental restorative materials made of a gold alloy or the like.

The above object can be achieved by the tooth restorative coating the surface of the metal base material provided with the Ti-6Al-4V-based alloy with an oxide film formed by plasma electrooxidation (PEO) according to the present invention. have.

Here, the oxide film may be formed to a thickness of 3 ~ 30 (㎛).

Here, the tooth restorative material may further include a ceramic coating layer sintered after applying the ceramic powder to the oxide film.

In addition, the ceramic coating layer may be provided in a range of 1 ~ 300 (㎛) thickness after sintering (燒結).

The tooth restorative material may further include a ceramic sheet coating layer sintered after adhering the ceramic green sheet to the oxide film.

Here, the ceramic sheet coating layer may be provided in a range of 10 ~ 1,000 (㎛) thickness after sintering (燒結).

In addition, the metal base material may include 50 mol% or more of titanium (Ti).

Meanwhile, according to the present invention, the above object is also achieved by a medical biomaterial coated with an oxide film formed by plasma electrooxidation (PEO) of a metal base material provided with a Ti-6Al-4V-based alloy. Can be.

Here, the oxide film may be formed to a thickness of 3 ~ 30 (㎛).

In addition, the medical biomaterial may further include a ceramic coating layer sintered after applying the ceramic powder to the oxide film.

Here, the ceramic coating layer may be provided in a range of 1 ~ 300 (㎛) thickness after sintering (燒結).

Meanwhile, the medical biomaterial may further include a ceramic sheet coating layer sintered after adhering the ceramic green sheet to the oxide film.

Here, the ceramic sheet coating layer may be provided in a range of 10 ~ 1,000 (㎛) thickness after sintering (燒結).

In addition, the metal base material may include 50 mol% or more of titanium (Ti).

According to the present invention, by forming an oxide film formed by a plasma electrolytic oxidation method on a titanium (Ti) alloy, it is possible to significantly improve the bonding strength between the interface between the alloy and the ceramic.

In addition, it has a higher strength than the conventional ceramic restorative material, has a low specific gravity compared to the gold alloy restorative material can be implemented excellent durability and light tooth restorative material.

In addition, by having the same color and texture as the teeth of the human body can implement aesthetically excellent tooth restorative material.

In addition, it is possible to implement an excellent tooth restorative material while reducing unnecessary use of precious metals by replacing expensive tooth restorative materials provided with gold alloys.

Hereinafter, the configuration of the present invention will be described in detail.

Prior to this, the terms used in the specification and claims should not be construed in a dictionary sense, and the inventor may, on the principle that the concept of a term can be properly defined in order to explain its invention in the best way And should be construed in light of the meanings and concepts consistent with the technical idea of the present invention.

Therefore, the configurations described herein are only exemplary embodiments of the present invention, and do not represent all of the technical ideas of the present invention, and therefore, various equivalents and modifications exist that can replace them at the time of the present application. It should be understood that it can.

In the dental restorative material according to the present invention, after coating the surface of the metal base material provided with the Ti-6Al-4V-based alloy with an oxide film formed by plasma electrooxidation (PEO), the ceramic powder is coated on the oxide film. Or by coating a ceramic green sheet.

Here, the metal base material is provided in the shape of the dental restoration by processing the medical titanium (Ti) -based alloy by CAD / CAM or other methods.

In addition, the plasma electrolytic oxidation method is a coating and surface treatment technique, also referred to as a micro arc oxidation technique or a plasma deoxidation technique, and forms an oxide film on a metal base material such as magnesium (Mg), aluminum (Al), titanium (Ti), or the like. This is how you do it.

In the plasma electrolytic oxidation method, a high voltage of several hundred volts is applied between a metal (anode) and a stainless electrode (cathode) charged in an alkaline electrolyte solution to form a plasma reaction on the surface of the metal base material to form an ultrahard oxide film.

In addition, the plasma electrolytic oxidation method can form an oxide film having a thickness and property that cannot be manufactured by conventional methods such as anodizing, electroplating or plasma spray coating, and using a weak alkali electrolyte solution. It is an environmentally friendly method.

In addition, the components of the oxide film formed on the surface of the metal base material is mainly occupied by the oxide of the metal base material, the components of the oxide film may vary depending on the composition and concentration of the electrolyte solution.

Here, the oxide film formed on the surface of the metal base material by the plasma electrolytic oxidation method includes a titanium oxide (TiO 2) component, which is an oxide of titanium (Ti), which is a metal base material, and preferably, 3 to 30 (μm) It may be formed in a thickness.

Here, if the oxide film is formed less than 3㎛, it is difficult to form an oxide film on the surface of the metal base material stably, if the oxide film is formed more than 30㎛, the oxide film is fragile can be peeled off the surface of the metal base material. .

Meanwhile, the dental restorative material according to the present invention may further include a ceramic coating layer sintered after applying ceramic powder to the oxide film formed on the surface of the metal base material by the plasma electrolytic oxidation method.

Here, the application of the ceramic powder is performed by applying a brush or the like that the ceramic powder is kneaded with a solution such as water on the oxide film formed on the surface of the metal base material.

In addition, the coating of the ceramic powder may be performed using a dipping method or the like.

In addition, the said sintering means the phenomenon which adhere | attaches and solidifies tightly when a powder body is heated.

Therefore, the interface between the ceramic powder and the oxide film is bonded or deposited by the heat transferred in the sintering process so that the interface between the ceramic and the oxide film is stably bonded, thereby forming a ceramic coating layer on the oxide film. have.

Here, the ceramic coating layer may be provided in a range of 1 ~ 300 (㎛) thickness after sintering (燒結), the thickness of the ceramic coating layer is a thickness that does not include the thickness of the oxide film.

In addition, when the thickness of the ceramic coating layer is less than 1㎛ it is difficult to form a stable ceramic coating layer, when the thickness of the ceramic coating layer is formed more than 300㎛, due to the difference in thermal expansion coefficient between the oxide film and the ceramic coating layer The coating layer may peel off.

Meanwhile, the dental restorative material according to the present invention may further include a ceramic sheet coating layer sintered after adhering the ceramic green sheet to the oxide film formed on the surface of the metal base material by the plasma electrolytic oxidation method.

Here, the ceramic green sheet is a kind of thin ceramic sheet produced by inverting powder or ceramic powder by a method such as a doctor blade.

That is, the interface between the ceramic green sheet and the oxide film is bonded or deposited by the heat transferred in the sintering process as described above, so that the interface between the ceramic green sheet and the oxide film is stably bonded, thereby forming an image on the oxide film. It is possible to form a ceramic sheet coating layer.

Here, the ceramic sheet coating layer may be provided in a range of 10 ~ 1,000 (㎛) thickness after sintering (燒結), the thickness of the ceramic sheet coating layer is the thickness does not include the thickness of the oxide film.

In addition, when the thickness of the ceramic sheet coating layer is less than 10㎛ it is difficult to form a stable ceramic sheet coating layer, when the thickness of the ceramic sheet coating layer is formed over 1000㎛, the thermal expansion coefficient of the oxide film and the ceramic sheet coating layer The ceramic sheet coating layer may be peeled off due to the difference.

In addition, forming the ceramic coating layer or the ceramic sheet coating layer on the oxide film improves the durability of the dental restorative material and at the same time the medical titanium (Ti) alloy is mainly black, so that the dental restorative material has the same color as the teeth of the human body. This is to make it appear.

In addition, the contents of the ceramic coating layer or the ceramic sheet coating layer coated on the oxide coating and the oxide coating on the tooth restorative material may be applied to medical biomaterials such as prostheses that connect bone tissue of the human body, and to avoid duplication of description. Note that the description of the oxide film and the ceramic coating layer or the ceramic sheet coating layer implemented in the medical biomaterial is omitted.

As described above, the dental restoration and the medical biomaterial according to the present invention can significantly improve the bonding strength between the alloy and the ceramic by forming an oxide film formed through a plasma electrolytic oxidation method on a titanium (Ti) alloy. In addition, it has a higher strength than the conventional ceramic restorative material, and has a low specific gravity compared to the gold alloy restorative material, thereby providing excellent durability and light dental restoration and medical biomaterial.

In addition, by having the same color and texture as the teeth of the human body, it is excellent in aesthetic, and can replace the expensive tooth restoring material provided with a gold alloy, such as to reduce unnecessary use of precious metals and at the same time can implement a dental restoration excellent in economical efficiency.

As mentioned above, although the present invention has been described with respect to the above-described limited content, the technical idea of the present invention is not limited to the above, and by those skilled in the art to which the present invention pertains, Various modifications and variations may be made without departing from the scope of the appended claims.

Claims (14)

As a tooth restorative material, the surface of a metal base material formed of a Ti-6Al-4V-based alloy is coated with an oxide film formed by plasma electrooxidation (PEO). The oxide film is formed to a thickness of 3 ~ 30 (㎛), The dental restorative material includes a ceramic sheet coating layer having a thickness of 10 to 1,000 μm after being sintered after adhering the ceramic green sheet to the oxide film. The metal base material is a dental restoration, characterized in that it comprises at least 50 mol% titanium (Ti). delete delete delete delete delete delete A medical biomaterial which is coated with an oxide film formed by plasma electro oxidization (PEO: Plasma Electronic Oxidation) (PEO). The oxide film is formed to a thickness of 3 ~ 30 (㎛), The medical biomaterial includes a ceramic sheet coating layer having a thickness of 10 to 1,000 μm after being sintered after adhering the ceramic green sheet to the oxide film. The metal base material is a medical biomaterial, characterized in that it comprises at least 50 mol% titanium (Ti). delete delete delete delete delete delete