JP2005013719A - Intra-orally worn body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an intra-orally worn body indwelled in the oral cavity for a long period of time. <P>SOLUTION: This intra-orally worn body 1 is provided with a worn body formed of a metal and worn in the oral cavity and a covering layer formed on the surface of the worn body and made of diamondlike carbon (DLC). The covering layer is the intra-orally worn body formed by preferably a chemical vapor deposition method, especially a plasma CVD method, or by a physical vapor deposition method, especially an ion plating method. Preferably, the thickness of the covering layer of this intra-orally worn body is within a range of 0.01-10 μm. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an intraoral mounting body, and particularly to an intraoral mounting body that can be placed in the oral cavity for a long period of time.

  Wearing devices that are placed in the oral cavity, such as crowns, crowns, bridges, partial dentures, full dentures, and various orthodontic appliances, are commonly used. ing. These materials include various materials, but ceramics, cobalt-chromium alloys, nickel-titanium alloys and the like are mainly used (see Non-Patent Document 1). However, in the case of a wearing article made of the cobalt-chromium alloy or nickel-titanium alloy described in Non-Patent Document 1, the surface of the wearing article elutes and causes metal allergy due to metal ions. There is a problem.

Tetsuya Kantake, “Introduction to Dental Science and Engineering”, Nagasue Shoten, 1978, p. 318-471

  This invention makes it the subject to eliminate such a conventional problem and to provide the intraoral mounting body which can be detained in the oral cavity over a long period of time.

  As a result of intensive studies in order to develop an intraoral wearing body having the above-mentioned preferable properties, the inventors have coated the wearing article with diamond-like carbon, so that the wearing article is, for example, a nickel-titanium alloy. It was found that the elution of nickel is greatly reduced when it is composed of, for example. The present invention has been completed based on such findings.

  In order to achieve the above object, an intraoral wearing body of the present invention is formed of a metal, and a covering layer made of a wearable article to be worn in the oral cavity and diamond-like carbon (DLC) formed on the surface of the wearable article. It is characterized by comprising.

  In the intraoral wearing body of the present invention, it is preferable that the coating layer is formed by a chemical vapor deposition method.

  In the intraoral body of the present invention, the chemical vapor deposition method is preferably a plasma CVD method.

  In the intraoral wearing body of the present invention, the coating layer is preferably formed by physical vapor deposition.

  In the intraoral body of the present invention, the physical vapor deposition method is preferably an ion plating method.

  In the intraoral body of the present invention, the coating layer is preferably formed within a pressure range of 0.1 to 100 Pa.

  In the intraoral wearing body of the present invention, the thickness of the coating layer is preferably formed within a range of 0.01 to 10 μm.

  ADVANTAGE OF THE INVENTION According to this invention, the intraoral mounting body which can be detained in the oral cavity over a long period of time can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The intraoral mounting body 1 which concerns on one Embodiment of this invention is shown by FIGS. Here, FIG. 1 is a schematic view of the complete denture as the intraoral mounting body 1, and FIG. 2 is an enlarged cross-sectional view showing a part of the complete denture in FIG. 1. 3 is a schematic view showing a correction wire as the intraoral mounting body 1, and FIG. 4 is an enlarged cross-sectional view showing a part of the wire of FIG. FIG. 5 is a cross-sectional view showing a crown denture as an intraoral mounting body.

[Oral body]
The intraoral mounting body 1 of the present invention is formed of a metal as shown in FIGS. 1 to 5, and more specifically, as shown in FIGS. 2 and a coating layer 3 made of diamond-like carbon (DLC) formed on the surface.

  Examples of the intraoral mounting body 1 include dentures (see FIGS. 1 and 2), inlays, clasps, implants, dental bridges, dental crowns, orthodontic appliances, wires (see FIGS. 3 and 4), and the like. It is done.

  Here, as a dental bridge (also referred to as a bridge denture), for example, when a missing tooth is replaced with a denture, a denture fixed by a tooth (also referred to as a support tooth) adjacent to the missing tooth. The fixing tool etc. are mentioned. Examples of the dental crown include a coated crown that repairs a tooth defect. Examples of the orthodontic appliance include a dental fixture used for orthodontic treatment such as malocclusion.

  In the present embodiment, examples of the intraoral mounting body 1 include a complete denture (see FIGS. 1 and 2), a wire (see FIGS. 3 and 4), and a crown denture (see FIG. 5). 5 is formed of a crown denture 2 attached to an implant 5 embedded in a bone 6 via a cement 4 and a coating layer 3 formed on the surface thereof.

[Attached items]
Specifically, as shown in FIGS. 2, 4, and 5, the attachment 2 is made of metal, and the material of the attachment 2 is appropriately selected according to the use of the intraoral attachment 1.

  The metal may be a single metal or an alloy. Examples of the simple metal include titanium, gold, platinum, and palladium.

  Examples of the alloy include nickel-titanium alloy, stainless steel alloy, palladium alloy, platinum alloy, silver-palladium alloy, and cobalt-chromium alloy.

  On the other hand, the method of forming the attachment 2 is appropriately selected according to the use of the intraoral attachment 1 of the attachment 2 and includes, for example, a casting method, a mechanical processing method, and the like.

[Coating layer]
Specifically, the covering layer 3 is a layer made of diamond-like carbon formed on the surface of the attachment 2 as shown in FIGS. Diamond-like carbon is sometimes referred to as DLC, which is an abbreviation for Diamond Like Carbon.

  Here, examples of the method for forming the coating layer 3 include physical vapor deposition and chemical vapor deposition. A method for confirming that the coating layer 3 is made of diamond-like carbon includes Raman spectroscopy.

  Examples of physical vapor deposition include thermal vapor deposition (also referred to as vacuum vapor deposition), sputtering, ion plating, and cluster ion beam.

  Examples of the thermal evaporation method include a resistance heating method, a flash evaporation method, an arc evaporation method, a laser heating method, a high frequency heating method, an electron beam heating method, and a molecular epitaxy method.

  Examples of the sputtering method include a two-pole DC glow discharge method, a three-pole DC glow discharge method, a two-pole RF glow discharge method, an ion beam sputtering method, and a magnetron method.

  On the other hand, examples of the chemical vapor deposition method include atmospheric pressure CVD (Chemical Vapor Deposition, abbreviated as CVD in the text), low pressure CVD, photo CVD, plasma CVD and the like.

  In the intraoral wearing body of the present invention, the coating layer is preferably formed by chemical vapor deposition, and this chemical vapor deposition is preferably a plasma CVD method.

  Alternatively, in the intraoral wearing body of the present invention, the coating layer is preferably formed by physical vapor deposition, and this physical vapor deposition is preferably an ion plating method.

  In the intraoral wearing body 1 of the present invention, the coating layer 3 is preferably formed within a temperature range of 0 to 600 ° C.

  In the intraoral wearing body 1 of the present invention, the coating layer 3 is preferably formed within a pressure range of 0.1 to 100 Pa.

  In the intraoral mounting body 1 of the present invention, the thickness of the coating layer 3 is preferably formed within a range of 0.01 to 10 μm. Here, if the thickness of the coating layer 3 is less than 0.01 μm, the wear resistance of the coating layer 3 may be insufficient. If the thickness of the coating layer 3 exceeds 10 μm, the material cost of DLC may be higher than the required effect.

According to this embodiment as described above, the following effects are obtained.
(1) Since the coating layer 3 is provided, the DLC is excellent in wear resistance, so that the wear on the surface of the intraoral wearing body 1 is reduced, and as a result, the oral cavity is placed in the oral cavity for a long period of time. The inner mounting body 1 can be detained. Moreover, since DLC does not contain the component which irritate | stimulates with respect to a biological body, it can continue using this intraoral wear body favorably.
(2) When the coating layer 3 is formed by a chemical vapor deposition method, the coating layer 3 having a uniform thickness and components can be formed, so that the quality of the intraoral wearing body can be improved.
(3) When the chemical vapor deposition method is a plasma CVD method, since the raw material is deposited at a high speed because the raw material is in a plasma state, the plasma CVD method shortens the formation time of the coating layer 3. Can do.
(4) When the coating layer 3 is formed by a physical vapor deposition method, the raw material is evaporated to coat the object, so that the deposition can be performed without being limited to the object.
(5) When the physical vapor deposition method is an ion plating method, since the ionized particles collide with a negatively applied object with kinetic energy, a strong adhesion can be obtained. .

  It should be noted that the present invention is not limited to the above-described embodiment, and modifications and improvements within a scope that can achieve the object of the present invention are included in the present invention. In addition, the specific structure, shape, and the like when carrying out the present invention may be other structures and the like as long as the object of the present invention can be achieved.

[Example 1]
The intraoral wear body 1 according to the embodiment was manufactured under the following specific conditions for forming the DLC coating layer. In Example 1, as the intraoral mounting body 1, a wire was manufactured.
Wearing length: 20cm
Wearing diameter: 0.5mm
Wearing material: Nickel-titanium alloy coating layer forming method: Ion plating method Coating layer forming temperature: 50 ° C
Pressure when forming the coating layer: 0.5 Pa
Covering layer thickness: 1μm
Under the above conditions, using the ion plating apparatus, after setting the pressure in the chamber in the ion plating apparatus to 0.001 Pa, introducing a hydrocarbon-based gas as a raw material of the coating layer into the chamber, A DLC coating layer was formed under a pressure of 0.5 Pa.

[Example 2]
In Example 2, as the intraoral mounting body 1, a denture was manufactured.
Attachment material: Cobalt-chromium alloy coating method: Plasma CVD
Temperature at the time of forming the coating layer: 25 ° C
Pressure at the time of forming the coating layer: 10 Pa
Covering layer thickness: 0.5 μm
Under the above conditions, after using the plasma CVD apparatus to set the pressure in the chamber in the plasma CVD apparatus to 0.01 Pa, a hydrocarbon gas serving as a raw material for the coating layer is introduced into the chamber, and the discharge pressure is increased. A DLC coating layer was formed under the conditions of 100 W and discharge gas pressure of 10 Pa.

[Comparative Example 1]
Although the wire was manufactured as the intraoral mounting body which concerns on the comparative example 1, only the point which has not formed the coating layer on the mounting thing from Example 1 is different.

[Comparative Example 2]
Although the denture was manufactured as an intraoral mounting body according to Comparative Example 2, the only difference from Example 2 was that a coating layer was not formed on the mounting object.

[Comparative Example 3]
As an intraoral wearing body according to Comparative Example 3, a wire was manufactured. However, in Example 1, a coating layer made of graphite was formed on the attachment instead of a coating layer made of DLC, and The only difference is that the coating layer is formed by vacuum deposition.

[Comparative Example 4]
As an intraoral wearing body according to Comparative Example 4, a denture was manufactured. However, in Example 2, a covering layer made of graphite was formed on the attachment, not a coating layer made of DLC, and The only difference is that the coating layer is formed by vacuum deposition.

[Evaluation methods]
Performance evaluation was performed about the above Examples 1 and 2 and Comparative Examples 1-4. As an evaluation method, a wear resistance test and a peel resistance test were performed.

[Abrasion resistance test]
In the abrasion resistance test, a constant load was applied and a scratch test was performed using an abrasion tester. The less scratches, the better.

[Peel resistance test]
The peel resistance test was performed by bending the test sample and then observing the appearance with an optical microscope and the fine surface with an electron microscope. The smaller the confirmed peeling, the better.

[Dissolution test]
The dissolution test is performed by immersing the test sample in physiological saline at 37 ° C. for 1 month and measuring the dissolution amount of the components (nickel, titanium, cobalt, and chromium) of the attached article dissolved in the physiological saline. It was. The fewer the components of the worn out material, the better.

[Evaluation results]
The results of the above abrasion resistance test, discoloration resistance test, and dissolution test are shown in Table 1 below. In Table 1, “-” indicates that there is no applicable item, or evaluation cannot be performed, “◎” indicates that the product is satisfactory, “◯” indicates that the product may be used, and “Δ” indicates that the product is defective. Indicates that it was poor enough to be used.

  According to Table 1, Examples 1 and 2 were compared with Comparative Examples 1 to 4, and it was found that Examples 1 and 2 were superior in wear resistance, discoloration resistance, and elution prevention. It was.

  The present invention can provide an intraoral wearing body that can be placed in the oral cavity for a long period of time.

FIG. 1 is a schematic view showing a complete denture as an intraoral body according to the present invention. FIG. 2 is an enlarged cross-sectional view showing a part of the complete denture of FIG. FIG. 3 is a schematic diagram showing a wire as an intraoral body according to the present invention. FIG. 4 is an enlarged cross-sectional view showing a part of the wire of FIG. FIG. 5 is a cross-sectional view showing a crown denture as an intraoral mounting body according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Oral mounting body 2 Attached thing 3 Covering layer 4 Cement 5 Implant 6 Bone

Claims (7)

An intraoral wearing body comprising an attachment formed of metal and attached to the oral cavity, and a coating layer made of diamond-like carbon (DLC) formed on the surface of the attachment. The intraoral wearing body according to claim 1, wherein the coating layer is formed by a chemical vapor deposition method. The intraoral wearing body according to claim 2, wherein the chemical vapor deposition method is a plasma CVD method. The intraoral wearing body according to claim 1, wherein the coating layer is formed by a physical vapor deposition method. The intraoral wearing body according to claim 4, wherein the physical vapor deposition method is an ion plating method. The intraoral wearing body according to any one of claims 1 to 5, wherein the coating layer is formed within a pressure range of 0.1 to 100 Pa. The thickness of the said coating layer is formed in the range of 0.01-10 micrometers, The intraoral mounting body of any one of the said Claims 1-6 characterized by the above-mentioned.

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