JP2018089011A - Production method of plate denture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a production method of a plate denture highly efficiently adjusting positions of artificial teeth when the artificial teeth are arranged in the plate denture.SOLUTION: A plate denture 100 is prepared, the plate denture including a plurality of artificial teeth 12 arranged at a socket part of a denture base 14. Secondly, a rectangular temporal fixing material 10 is arranged outside a gum so as to cover the gum part of the plate denture, and the artificial teeth 12 are temporarily fixed to the denture floor 14 (a temporal fixing step). Thirdly, an acrylic resin is injected in a gap between the socket part of the denture floor 14 and the artificial teeth 12, with the artificial teeth 12 temporarily fixed to the denture floor 14, using an injector 20 filled with the acrylic resin. After that, the acrylic resin is polymerized under a normal temperature (0°C-35°C), heated, or polymerized by light energy, and then, the artificial teeth 12 are permanently bonded to the plate denture 14 (a permanent bonding step).SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for producing a plate denture.

  In recent years, the manufacture of denture bases and base dentures using a CAD / CAM (Computer Aided Design and Computer Aided Manufacturing) system has been proposed. Introducing a CAD / CAM system in the manufacture of denture bases and denture bases has the advantage that work efficiency can be improved and variation in quality can be suppressed.

  Moreover, when producing a denture using a CAD / CAM system, there is a step of cutting the CAD / CAM system to produce a denture base and bonding an artificial tooth to the produced denture base. At this time, a dental denture base resin (hereinafter also simply referred to as “resin”) is dropped as an adhesive into a concave portion (hereinafter also referred to as “socket portion”) of the denture base, and the artificial teeth are manually inserted into the socket portion. After fitting, the resin is polymerized and bonded. A resin used as an adhesive is obtained by mixing polymer powder and a monomer liquid, and has a low viscosity immediately after mixing, but increases in viscosity and hardens at room temperature.

Various techniques have been disclosed as techniques for adhering artificial teeth to a denture base.
For example, a concave portion for artificial tooth arrangement formed on the surface of the resin floor is surface-modified, and the resin teeth are bonded to the surface-modified concave portion via an adhesive, and self as an adhesive (resin). The use of an adhesive type super bond is disclosed (for example, see Patent Document 1).
Further, it is disclosed that after the primer treatment is performed on the base surface of the artificial tooth, an immediate polymerization resin is applied to the primer-treated surface to form an adhesive layer, and the artificial tooth and the floor are bonded (for example, , See Patent Document 2).

JP 2014-155878 A JP 2008-289839 A

  The resins described in Patent Documents 1 and 2 have a low viscosity immediately after mixing, but the viscosity increases with time. Therefore, when the resin is dropped on the socket part and the artificial teeth are placed on the socket part, the resin Is gradually cured by polymerization and is not easy to handle.

  Furthermore, if the artificial tooth placed in the socket is fixed due to polymerization of the resin, the artificial tooth cannot be moved, and if the fixed artificial tooth is removed and the position adjustment is attempted, the denture base is damaged. End up. Therefore, there is a problem that the position of the artificial tooth cannot be corrected or fine-tuned when time passes after the artificial tooth is arranged in the socket portion.

  This invention is made | formed in view of the said problem, and when providing an artificial tooth in a denture base, it aims at providing the manufacturing method of the denture which can adjust the position of an artificial tooth accurately.

Means for solving the problems include the following aspects.
<1> a step of temporarily fixing an artificial tooth to a denture base using a temporary fixing material;
Bonding the temporarily fixed artificial tooth to the denture base;
A method for manufacturing a denture containing a denture.
<2> The method for producing a denture according to <1>, wherein the bonding step is a step of permanently bonding the artificial tooth to the denture base using an acrylic resin.
<3> The step of adhering includes preliminarily adhering the artificial tooth to the denture base,
Removing the temporary fixing material;
A step of permanently adhering the artificial tooth to the denture base using an acrylic resin;
The manufacturing method of the plate denture as described in <1> which is a process including this.
<4> The method for producing a base denture according to <3>, wherein the step of preliminary bonding is a step of preliminary bonding the artificial tooth to at least a part of the concave portion of the denture base.
<5> The method for manufacturing a denture according to any one of <1> to <4>, wherein the temporary fixing material is an adhesive material that deforms at 25 ° C.
<6> The method for producing a denture according to any one of <1> to <5>, further including a step of producing the denture base by a CAD / CAM system before the step of temporarily fixing.

  ADVANTAGE OF THE INVENTION According to this invention, when arrange | positioning an artificial tooth in a denture base, the manufacturing method of a denture with a precise position adjustment of an artificial tooth can be provided.

(A) is a perspective view of the denture before a temporary fixing material is arrange | positioned, (b) is a perspective view for demonstrating the process of temporarily fixing, (c) demonstrates the process of this adhesion | attachment. It is a perspective view for doing. (A) is a perspective view of the denture before a temporary fixing material is arrange | positioned, (b) is a perspective view for demonstrating the process to temporarily fix, (c) is a floor with (b). It is a perspective view which shows the state which looked at the denture from the direction of X, (d) shows the enlarged schematic view which expanded the Y part of (c) for demonstrating a pre-adhesion process, (e) is a temporary fixing material. It is a perspective view for demonstrating the process of removing, and (f) is a perspective view for demonstrating the process of this adhesion | attachment.

  In this specification, the term “process” is not limited to an independent process, and is included in this term if the intended purpose of the process is achieved even when it cannot be clearly distinguished from other processes. It is.

[Method of manufacturing denture]
A method for manufacturing a denture according to the present embodiment (hereinafter also referred to as “manufacturing method of the present embodiment”) includes a step of temporarily fixing an artificial tooth to a denture base using a temporary fixing material, and a temporary fixed artificial Adhering the teeth to the denture base. Moreover, in the manufacturing method of this embodiment, it is preferable that the process to adhere | attach is a process of adhere | attaching the artificial tooth temporarily fixed to the denture base using acrylic resin.
According to the manufacturing method of this embodiment, when the artificial tooth is placed on the denture base, the position adjustment of the artificial tooth can be performed with high accuracy. The reason is guessed as follows.
In the manufacturing method of the present embodiment, after the step of temporarily fixing the artificial tooth to the denture base, the artificial tooth is bonded to the denture base (that is, main bonding). As a result, before the artificial tooth is permanently bonded to the denture base, the tooth arrangement (position) is corrected, and if there is a tooth that requires shape adjustment, the target tooth is temporarily removed and the same is performed again. It can be arranged (temporarily fixed) at a position.
Moreover, since the socket part of the denture base into which the artificial tooth is inserted is formed so as to have play with respect to the outer periphery of the artificial tooth, when the resin (for example, acrylic resin) is injected, the surface tension of the resin Artificial teeth will float. However, in the manufacturing method of the present embodiment, the artificial tooth is permanently bonded to the denture base in a state where the temporary fixing material is disposed or in a state where the temporary fixing material is disposed and the artificial tooth is preliminarily bonded to the denture base. Therefore, injection of the resin in the main bonding makes it difficult for the artificial tooth to lift up in the socket portion. Thereby, a several artificial tooth can be adhere | attached in the appropriate position which suppressed the lifting.
Therefore, according to the manufacturing method of this embodiment, when the artificial tooth is placed on the denture base, the position of the artificial tooth can be accurately adjusted. Position adjustment using such a temporary fixing material has a high correction accuracy, and is an effective method for adjusting the height of the teeth particularly for occlusal adjustment.
Therefore, according to the manufacturing method of the present embodiment, it is easy to obtain a plate denture in which the position of the artificial tooth is adjusted with high accuracy, and it is particularly easy to obtain a plate denture in which the height of the occlusion is adjusted with high accuracy.

In addition to the effects described above, the manufacturing method of the present embodiment is expected to produce the following effects. The reason is guessed as follows.
Usually, in order to prevent dropping of the artificial tooth after bonding, for example, a large amount of acrylic resin may be dripped onto the socket part of the denture base. However, if a large amount of acrylic resin is dripped, the acrylic resin protrudes when the artificial tooth is placed in the socket portion, causing a problem that the denture base is contaminated, and also a problem of aesthetics. Furthermore, it is preferable that the denture base and the acrylic resin are made of the same material from the viewpoint of adhesiveness. However, in this case, the protruding acrylic resin cannot be easily removed, and the post-treatment is carried out by a technical engine. It is necessary to remove the acrylic resin. Such post-processing is a factor that increases manufacturing time.
In addition, since the appropriate amount of the acrylic resin to be dropped is determined by the relationship between the socket portion and the artificial tooth, it is not realistic to calculate in advance the appropriate amount of the acrylic resin to be dropped for each socket portion.
On the other hand, in the manufacturing method of the present embodiment, the artificial tooth is placed in the state where the temporary fixing material is arranged as described above, or in the state where the temporary fixing material is arranged and the artificial tooth is preliminarily bonded to the denture base. Since the main bonding is performed on the denture base, the amount of the resin (for example, acrylic resin) used for the main bonding is easily adjusted, and the resin does not easily protrude from the gap between the artificial teeth. Therefore, contamination of the denture base or artificial tooth by the protruded resin is suppressed, and for example, post-treatment for removing the resin is often unnecessary.
Therefore, according to the manufacturing method of this embodiment, the manufacturing time of a plate denture is easy to be shortened. Furthermore, since the protrusion of the resin is suppressed, it is easy to ensure aesthetics.

  Hereinafter, each process of the manufacturing method of this embodiment is demonstrated.

<Temporary fixing process>
The step of temporarily fixing is a step of temporarily fixing the artificial tooth to the denture base using a temporary fixing material (hereinafter also referred to as “temporary fixing step”).
Temporary fixation refers to temporarily fixing the artificial tooth to the denture base to such an extent that the positional relationship between the artificial tooth and the denture base is maintained.
Although the method for temporarily fixing the artificial tooth to the denture base is not particularly limited, the temporary fixing material is, for example, covered so as to cover a part including at least one of the artificial tooth and the denture base (for example, the boundary part of the crown and root), A method of disposing on the outer side of the gingiva (lip side, cheek side) or inner side of the gingiva (lingual side); Can be mentioned. When the temporary fixing material is disposed outside the gingiva, a resin used for preliminary bonding or main bonding can be injected from the inside of the gingiva, so that a denture with excellent aesthetics can be easily obtained.

(Temporary fixing material)
The temporary fixing material can be applied without particular limitation as long as it has adhesiveness with an artificial tooth and a denture base and can be deformed at 25 ° C. (normal temperature).
That is, the temporary fixing material is preferably an adhesive material that deforms at 25 ° C.
Examples of the adhesive material include urethane resins, acrylic resins, silicone resins, vinyl chloride resins, vinyl alcohol resins, vinyl alkyl ether resins, acrylamide resins; natural rubber, silicone rubber And rubber such as styrene-butadiene copolymer elastomer.

Moreover, as said adhesive material, you may use putty (for example, model production action putty, dental putty), a tack label, flour clay, and a metal foil tape, for example.
Putty refers to a material used to fill depressions, cracks, holes and the like. The putty generally contains a pigment, a resin (nonvolatile color former), and a volatile substance.
Putty is one-component (one-component) or multi-component (two-component) putty such as epoxy putty, polyester putty, silicone putty or modified putty; lacquer putty; instant adhesive putty; gypsum putty; calcium carbonate Putty; photo-curing putty; and the like.
The tack label is a label in which an adhesive material is provided on the back surface of a base material, and is used by being disposed at a site (for example, near the boundary between a crown and a root) where the adhesive material side is temporarily fixed.
The material of the substrate is not particularly limited. Examples of the adhesive material provided on the back surface of the substrate include the resin and the rubber.
Moreover, as a metal foil tape, a well-known adhesive metal foil tape can be used.
Among adhesive materials, a putty is preferable, a dental putty is more preferable, and a dental silicone putty is still more preferable from the viewpoint of less residual adhesion to the denture after removal of the temporary fixing material. In particular, when a dental putty (preferably a dental silicone putty) is used, the position of the artificial tooth can be easily adjusted because there is little return during deformation. Moreover, the positional relationship between the artificial tooth and the denture base during temporary fixation is easily maintained.
The said adhesive material may be used individually by 1 type, and may use 2 types together.
The shape of the temporary fixing material is not particularly limited as long as the artificial tooth can be temporarily fixed to the denture base, and various shapes can be adopted.

(Denture base)
The material of the denture base used in the manufacturing method of the present embodiment is not particularly limited, but is acrylic based on being suitable for a CAD / CAM system and having excellent adhesion to a resin tooth made of a commercially available acrylic resin. Resins are preferred.

Here, the acrylic resin is selected from the group consisting of a structural unit derived from acrylic acid, a structural unit derived from methacrylic acid, a structural unit derived from an acrylate ester, and a structural unit derived from a methacrylic acid ester. It refers to a polymer comprising at least one species.
That is, the acrylic resin in this specification is at least one selected from the group consisting of acrylic acid, methacrylic acid, acrylic ester, and methacrylic ester (hereinafter also referred to as “acrylic monomer”). It is a polymer obtained by polymerizing the monomer component containing.
The acrylic monomer that is at least part of the raw material of the acrylic resin may be a monofunctional acrylic monomer or a polyfunctional acrylic monomer.
Examples of the monofunctional acrylic monomer include acrylic acid, methacrylic acid, acrylic acid ester having one acryloyl group in one molecule, and methacrylic acid ester having one methacryloyl group in one molecule.
Examples of the polyfunctional acrylic monomer include acrylic acid esters containing two or more acryloyl groups in one molecule, and methacrylic acid esters containing two or more methacryloyl groups in one molecule.

  As said acrylic ester, acrylic acid alkylester is preferable. Of these, alkyl acrylates having 1 to 4 carbon atoms in the alkyl group contained in the alkyl ester moiety are more preferred, methyl acrylate and ethyl acrylate are more preferred, and methyl acrylate is particularly preferred.

  As the methacrylic acid ester, a methacrylic acid alkyl ester is preferable. Among these, methacrylic acid alkyl esters having 1 to 4 carbon atoms in the alkyl group contained in the alkyl ester moiety are more preferred, methyl methacrylate and ethyl methacrylate are more preferred, and methyl methacrylate is particularly preferred.

The acrylic resin is preferably a polymer obtained by polymerizing a monomer component containing a monofunctional acrylic monomer from the viewpoint of reactivity and productivity.
The acrylic resin is obtained by polymerizing a monomer component containing 50% by mass or more (preferably 80% by mass or more, more preferably 90% by mass or more, and further preferably 95% by mass or more) of a monofunctional acrylic monomer. The obtained polymer is more preferable.
The acrylic resin is particularly preferably a polymer containing a structural unit derived from methyl methacrylate, and most preferably a homopolymer of methyl methacrylate (polymethyl methacrylate, that is, polymethyl methacrylate (PMMA)). It is.
The acrylic resin may contain rubber from the viewpoint of impact resistance.
Examples of the rubber include acrylic rubber, butadiene rubber, butadiene-acrylic rubber, butadiene-styrene rubber, and silicone rubber.
When the acrylic resin contains rubber, the type of rubber may be appropriately selected in consideration of physical properties, but considering the balance of physical properties such as hardness and impact resistance, butadiene rubber or butadiene-acrylic Rubber is preferred.

  The denture base may be colored in a color tone close to gingiva from the viewpoint of aesthetics. For coloring the denture base, for example, pigments, dyes, pigments and the like may be used.

The denture base may be a denture base for a full denture (so-called full denture) or a denture base for a local denture (so-called partial denture).
Further, the denture base may be a denture base of a maxillary denture, a denture base of a lower denture, or a set of an upper denture base and a lower denture base.

Moreover, as a denture base, the denture base produced in the preparation process mentioned later may be used, the denture base produced by the CAD / CAM system may be obtained, and the denture base may be used.
Moreover, you may use the denture base manufactured with 3D printer.

(Artificial teeth)
Examples of the artificial teeth include acrylic resin resin teeth and hard resin teeth. Further, the artificial tooth may contain a filler or the like.

  Next, the bonding process in the manufacturing method of this embodiment will be described.

<Step of bonding>
The step of bonding is a step of bonding the temporarily fixed artificial tooth to the denture base (hereinafter also referred to as “bonding step”). Although it does not restrict | limit especially as an adhesive agent (resin) for adhere | attaching an artificial tooth on a denture base, It is preferable to use an acrylic resin. The acrylic resin will be described later.
In other words, the bonding step is preferably a step (hereinafter also referred to as a “main bonding step”) in which the artificial tooth is permanently bonded to the denture base using an acrylic resin.
In addition, in this specification, this adhesion | attachment of a denture base and an artificial tooth means that the artificial tooth is being fixed to the denture base to such an extent that it can be used as a denture base.

(Main bonding process)
The main bonding step is a step of main bonding the artificial tooth to the denture base using an acrylic resin.
For example, an acrylic resin may be used to bond the artificial tooth to the denture base by injecting the acrylic resin into the gap between the denture base recess (socket portion) and the artificial tooth. Examples include polymerization at normal temperature (0 ° C. to 35 ° C.), polymerization by heating, or polymerization by light (for example, visible light).
Here, the recessed part of a denture base means the hollow part to which the artificial tooth in a denture base is adhere | attached, and is also called the socket part of a denture base.

(Acrylic resin)
The acrylic resin used for the main adhesion between the denture base and the artificial tooth is not particularly limited as long as the main adhesion between the denture base and the artificial tooth is possible, and a commercially available product may be used.
Examples of the acrylic resin include a resin that is polymerized at room temperature (0 ° C. to 35 ° C.), a resin that is polymerized by applying heat, and a resin that is polymerized by light. Examples of a resin that is polymerized at room temperature (0 ° C. to 35 ° C.) or a resin that is polymerized by applying heat include an acrylic resin that undergoes polymerization at a relatively low temperature (preferably 0 ° C. to 70 ° C.), and 70 ° C. or higher. And an acrylic resin in which polymerization proceeds. In the following, an acrylic resin in which polymerization proceeds at a relatively low temperature (preferably 0 ° C. to 70 ° C.) is referred to as a “specific acrylic resin”.

  As the acrylic resin, a mixture of polymer powder and monomer liquid may be used. When the acrylic resin is injected into the gap between the socket part and the artificial tooth, a low-viscosity acrylic resin immediately after mixing is used. It is preferable to use it. Examples of the polymer powder include acrylic resins such as polymethyl methacrylate, and examples of the monomer liquid include methacrylic esters such as methyl methacrylate and ethyl methacrylate. In addition, the acrylic resin includes, as other components, a diffusion promoting monomer such as 4-META (4-methacryloxyethyl trimellitic anhydride) and a room temperature polymerization initiator such as TBB (tri-n-butylborane) (or A thermal polymerization initiator), a polymerization inhibitor, a colorant, and the like.

  Examples of commercially available acrylic resins include Akron (manufactured by GC Corporation), Para Express Ultra (manufactured by Heraeus Kultzer), Refine Bright manufactured by Yamahachi Dental Industry Co., Ltd., and the like.

-Pre-bonding process-
In the manufacturing method of the present embodiment, the bonding step may include a step of pre-bonding the artificial tooth to the denture base (hereinafter also referred to as “pre-bonding step”).
In this specification, preliminary adhesion means that the artificial tooth is fixed to the denture base to the extent that the positional relationship between the artificial tooth and the denture base is maintained after preliminary adhesion.

As a method of pre-adhering the artificial tooth to the denture base, for example, using the dental composite resin or acrylic resin, the above resin (dental composite resin or acrylic resin) is injected into at least a part of the concave portion of the denture base. The injected resin is polymerized at normal temperature (0 ° C. to 35 ° C.), heated and polymerized, or polymerized with light (for example, visible light).
Examples of the resin used in the preliminary bonding step include a dental composite resin and an acrylic resin.
Examples of the acrylic resin used in the pre-adhesion step include those similar to the acrylic resin used in the main adhesion step. Among them, a specific acrylic resin (polymerized at a relatively low temperature (preferably 0 ° C. to 70 ° C.)). (Acrylic resin) in which The dental composite resin will be described later.
Teeth that require modification of the tooth arrangement and shape adjustment until the polymerization of the resin used for pre-adhesion progresses (for example, after photocuring in the case of a photopolymerizable resin) by having a pre-adhesion process in the adhesion process. If there is a tooth, the target tooth can be removed.

  Moreover, it is preferable that a pre-adhesion process is a process of pre-adhering an artificial tooth to at least one part of the recessed part (socket part) of a denture base from a viewpoint of adjusting the quantity of the resin used for this adhesion | attachment more appropriately.

(Dental composite resin)
The dental composite resin is not particularly limited as long as it allows pre-adhesion between an artificial tooth and a denture base. For example, a composite resin (restoration material) such as a molding restoration material, a crown prosthesis material, and a dental filler. Material), self-adhesive cement, and the like can be used.

  The composite resin includes, for example, dimethacrylate as a matrix resin, and may further include an inorganic filler, a silane coupling agent, and the like. Examples of the dimethacrylate include bisphenol A diglycidyl methacrylate (Bis-GMA), triethylene glycol dimethacrylate (TEGDMA), and urethane dimethacrylate (UDMA).

  As a self-adhesive cement, for example, polymethyl methacrylate (PMMA) or the above-mentioned dimethacrylate is included as a matrix resin, and in addition, an adhesive substance, a filler, or the like may be included.

  Moreover, examples of the composite resin include low-viscosity and low-elastic flowable types and high-viscosity and high-elasticity paste types. From the viewpoint of ease of injection into the denture base recess (socket portion). A flowable type having low viscosity and low elasticity is preferred.

  Moreover, it is preferable to use a photopolymerizable composite resin from the viewpoint that the position adjustment of the artificial tooth can be more suitably performed. By using a photopolymerizable composite resin, the composite resin injected into the socket part of the denture base does not harden before light irradiation, so that it is easy to handle and the position of the artificial tooth can be adjusted with high accuracy. In addition, by using a photopolymerizable composite resin, the adhesion after curing (preliminary adhesion) has a relatively weak adhesive force, so it is possible to easily remove the artificial tooth from the denture base. It is easy to re-adhere (preliminary adhesion) between the denture base and the artificial tooth by injecting the composite resin into the socket part of the denture base after removing the base. Therefore, when the shade (color tone) of the artificial tooth is wrong or when the position of the artificial tooth is shifted during the curing operation, the artificial tooth can be easily removed from the denture base even after curing. Therefore, it is easy to perform position adjustment by re-adhesion (preliminary adhesion).

The photopolymerizable composite resin may include, for example, a polymerizable compound such as (meth) acrylic acid ester, an inorganic filler, a photopolymerization initiator, and the like, and further includes a polymerization accelerator. There may be.
Examples of commercially available composite resins include Beauty Fill II (manufactured by Matsukaze Corporation), Revotech (manufactured by GC Corporation), and the like.

In the manufacturing method of this embodiment, when the bonding step includes a preliminary bonding step, the bonding step further includes a step of removing the temporary fixing material and a step of permanently bonding the artificial tooth to the denture base using an acrylic resin (this book). It is preferable that it is a process including these.
By including the above steps in the bonding process, when the artificial tooth is permanently bonded to the denture base, since the denture base and the artificial tooth are preliminarily bonded, the swing of the artificial tooth is suppressed and the artificial tooth is lifted. Is suppressed.
In addition, when the artificial tooth is permanently bonded to the denture base, the acrylic resin can be injected while checking the amount of the acrylic resin in the gap between the socket part and the artificial tooth. Contamination around the teeth and denture base is suppressed.
The main bonding process is as described above.

-Process for removing temporary fixing material-
When the bonding step includes a preliminary bonding step, the step of removing the temporary fixing material may be performed after the preliminary bonding step and before the main bonding step, or may be performed after the main bonding step. The former mode corresponds to an adhesion step A in a second embodiment described later.
In particular, when the adhering step is a preliminary adhering step, a step of removing the temporary fixing material, and a step of adhering the main fixing step in this order (adhesion step A), the artificial tooth is removed after the temporary fixing material is removed. Therefore, it is easy to inject the resin while confirming the amount of the resin injected into the gap between the artificial teeth.
Therefore, according to the bonding step A, the amount of the resin used for the main bonding is more easily adjusted, and the resin is more difficult to protrude from the gap between the artificial teeth. Therefore, the dentures obtained through the bonding step A tend to be more excellent in aesthetics.

The method for removing the temporary fixing material is not particularly limited. For example, the temporary fixing material can be peeled (removed) by hand or using an instrument.
In addition, when there is a temporary fixing material (residual part) that could not be removed, as a method of removing the residual part, for example, a method of scraping out the residual part by hand or using an instrument; elution of the residual part using a solvent A method of using an ultrasonic cleaner in combination with these methods.

  Hereinafter, the bonding process including the preliminary bonding process will be specifically described. A case where a specific acrylic resin (an acrylic resin whose polymerization proceeds at a relatively low temperature (preferably 0 ° C. to 70 ° C.)) is used as the resin for pre-adhering the artificial tooth to the denture base will be described.

  In order to pre-bond the artificial tooth to the denture base using the specific acrylic resin, specifically, the specific acrylic resin may be injected into the socket portion of the denture base and heated as necessary. Thus, the artificial tooth is bonded (preliminary bonding) to the denture base.

  If the artificial tooth is fixed to the denture base to the extent that it can be used as a denture base when the artificial tooth is bonded to the denture base (preliminary adhesion) using a specific acrylic resin, the pre-adhesion step is performed. It may be regarded as a main bonding step. In this case, this bonding is not necessary.

The amount of the specific acrylic resin to be injected into the socket part of the denture base is not particularly limited, but is an amount capable of adhering the artificial tooth to the denture base (pre-adhesion), and the specific acrylic resin from the socket part. It is preferable that the amount does not protrude.
As a mode of pre-adhering the artificial tooth to the denture base, for example, a small amount (for example, one drop) of a specific acrylic resin is injected into at least a part of the concave portion (socket part) of the denture base, and the artificial tooth is placed on the denture base. An embodiment in which adhesion (for example, point adhesion) is performed on at least a part of the concave portion is exemplified.

  After pre-adhering the artificial tooth to the denture base, an acrylic resin (including a specific acrylic resin) is injected into the gap between the socket part and the artificial tooth in order to permanently bond the artificial tooth to the denture base. At this time, since the denture base and the artificial tooth are pre-bonded and fixed, the swing of the artificial tooth is suppressed and the lifting of the artificial tooth is suppressed.

  In addition, when the artificial tooth is permanently bonded to the denture base, the acrylic resin can be injected while checking the amount of the acrylic resin in the gap between the socket part and the artificial tooth. Contamination around the teeth and denture base is suppressed.

  The acrylic resin is preferably injected into the gap between the socket part and the artificial tooth until the liquid level rises with surface tension to such an extent that it does not overflow from the socket part. Since acrylic resins shrink by polymerization, it is preferable to prevent appearance problems.

  Moreover, as the acrylic resin injected into the gap, it is preferable to use a low-viscosity acrylic resin immediately after mixing the polymer powder and the monomer liquid as described above.

After the acrylic resin is injected into the gap between the socket part and the artificial tooth, the acrylic resin is polymerized at normal temperature (0 ° C. to 35 ° C.), polymerized by heating, or polymerized by light (for example, visible light). As a result, the artificial tooth is permanently bonded to the denture base, and the denture can be manufactured.
The removal of the temporary fixing material may be performed after the artificial tooth is preliminarily bonded to the denture base, or may be performed after this is bonded.
Further, when there is an acrylic resin that protrudes from the gap between the artificial teeth, the acrylic resin may be removed by a known method such as scraping, scraping, or polishing using an instrument.

(Process for making denture base)
The method for producing a denture according to the present invention may further include a step of producing a denture base by a CAD / CAM system (hereinafter also referred to as “production step”) before the temporary fixing step.

  The production process may be a known method for producing a denture base using a CAD / CAM system. For example, a process for obtaining artificial tooth shape data indicating a three-dimensional shape of an artificial tooth and an artificial tooth shape data are used. The step of creating a three-dimensional model of the denture base and deleting the shape portion corresponding to the artificial tooth shape data from the three-dimensional model of the base denture, thereby obtaining denture base shape data indicating the three-dimensional shape of the denture base The process of creating and the process of manufacturing a denture base based on denture base shape data should just be included.

  Further, the method for manufacturing a denture according to the present invention further includes a step of creating NC (numerical control) data based on denture base shape data, and in the step of manufacturing the denture base, the NC data is input. It is preferable to manufacture a denture base using a machine tool. Further, in the step of manufacturing the denture base, the denture base may be manufactured using a three-dimensional printer in which denture base shape data is input. A three-dimensional printer is an additive manufacturing apparatus that forms an object by stacking materials one layer at a time based on shape data created using a CAD / CAM system. The three-dimensional printer that can be used in this step may employ any of a stereolithography method, a powder sintering lamination method, a heat melting lamination method, and an ink jet method.

  Hereinafter, 1st Embodiment of the manufacturing method of the denture based on this embodiment is described, referring drawings.

(First embodiment)
The manufacturing method of 1st Embodiment is an aspect whose adhesion process is a process (main adhesion process) which carries out the main adhesion | attachment of an artificial tooth to a denture base using an acrylic resin.
That is, the manufacturing method of 1st Embodiment includes the process of temporarily fixing an artificial tooth to a denture base using a temporary fixing material, and the said main adhesion process.
1st Embodiment demonstrates the example using the denture base of the lower denture as a denture base.
FIG. 1 (a) shows a perspective view of a denture before the temporary fixing material is arranged, FIG. 1 (b) shows a perspective view for explaining the step of temporary fixing, and FIG. 1 (c) shows a perspective view. A perspective view for explaining this adhesion process is shown.
First, a denture denture 100 in which a plurality of artificial teeth 12 are arranged in a socket portion (not shown) of the denture base 14 is prepared.
Next, as shown in FIG. 1B, the rectangular temporary fixing material 10 is covered with the gingival part of the denture (the boundary part of the crown and root), and the outside of the gingiva (lip side, Place on the buccal side. Thereby, the artificial tooth 12 is temporarily fixed to the denture base 14 (temporary fixing process).
Next, as shown in FIG. 1 (c), with the artificial tooth 12 temporarily fixed to the denture base 14, using an injector 20 filled with an acrylic resin, from the inside (lingual side) of the gingiva, An acrylic resin is injected into the gap between the socket part of the denture base 14 and the artificial tooth 12. Thereafter, the acrylic resin is polymerized at room temperature (0 ° C. to 35 ° C.), or is heated or polymerized with light, and the artificial tooth 12 is finally bonded to the denture base 14 (main bonding step). Thereafter, the temporary fixing material 10 is removed from the denture (a step of removing the temporary fixing material). A plate denture is manufactured as described above.

In the manufacturing method of the first embodiment, when the artificial tooth 12 is temporarily fixed to the denture base 14 (FIG. 1B), there is a tooth that requires correction of tooth arrangement and shape adjustment. Then, the target tooth can be removed, and the tooth whose shape has been adjusted using the same temporary fixing material 10 can be fixed (temporarily fixed) at the same position.
Moreover, in the manufacturing method of 1st Embodiment, this adhesion | attachment is performed in the state which temporarily fixed the artificial tooth 12 to the denture base 14. FIG. As a result, the injection of the acrylic resin suppresses the lifting of the artificial tooth in the socket portion, and as a result, the artificial tooth can be permanently bonded at an appropriate position where the lifting is suppressed.
Therefore, according to the manufacturing method of 1st Embodiment, when arrange | positioning an artificial tooth in the socket part of a denture base, the position adjustment of an artificial tooth can be performed with sufficient precision.

  Next, 2nd Embodiment of the manufacturing method of the denture based on this embodiment is described, referring drawings.

(Second Embodiment)
In the manufacturing method of the second embodiment, the bonding step includes a step of pre-bonding the artificial tooth to the denture base, a step of removing the temporary fixing material, and a step of permanently bonding the artificial tooth to the denture base using an acrylic resin. And in this order (hereinafter, also referred to as “adhesion step A”).
That is, the manufacturing method of 2nd Embodiment includes the process of temporarily fixing an artificial tooth to a denture base using a temporary fixing material, and the said adhesion process A.
In the second embodiment, as a specific acrylic resin for pre-adhering an artificial tooth to a denture base, an example using a room temperature polymerization type acrylic resin in which polymerization proceeds at a relatively low temperature (0 ° C. to 70 ° C.) is used. explain. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and redundant descriptions are omitted.
FIG. 2 (a) shows a perspective view of the denture before the temporary fixing material is arranged, FIG. 2 (b) shows a perspective view for explaining the step of temporary fixing, and FIG. The perspective view which shows the state which looked at the denture of FIG.2 (b) from the direction of X is shown, The expansion which expanded the Y part of FIG.2 (c) for demonstrating a pre-adhesion process to FIG.2 (d) A schematic view is shown, FIG. 2 (e) shows a perspective view for explaining the step of removing the temporarily fixing material, and FIG. 2 (f) shows a perspective view for explaining the main bonding step.
First, similarly to the manufacturing method of the first embodiment, a denture denture 100 in which a plurality of artificial teeth 12 are arranged in a socket portion (not shown) of the denture base 14 is prepared (FIG. 2A), and the base is provided. The temporary fixing material 10 is arrange | positioned to the denture 100, and the artificial tooth 12 is temporarily fixed to the denture base 14 (temporary fixing process, FIG.2 (b)).
Next, as shown in FIGS. 2 (c) and 2 (d), with the artificial tooth 12 temporarily fixed to the denture base 14, using the injector 22 filled with the specific acrylic resin 24, The specific acrylic resin 24 is injected into the socket part (not shown) of the denture base 14 from the (lingual side). In the present embodiment, one drop of the specific acrylic resin 24 is poured into the socket part. Thereafter, the specific acrylic resin 24 is heated as necessary. Thereby, the artificial tooth 12 is preliminarily bonded to the socket portion of the denture base 14 (preliminary bonding step).
Next, as shown in FIG.2 (e), the temporary fixing material 10 is removed from a base denture (process which removes a temporary fixing material). Thereafter, while maintaining the positional relationship between the artificial tooth 12 and the denture base 14, a denture is formed from the inner side (lingual side) of the gingiva using an injector filled with an acrylic resin in the same manner as in the first embodiment. An acrylic resin is injected into the gap between the socket part of the floor 14 and the artificial tooth 12. Thereafter, the acrylic resin is polymerized at room temperature (0 ° C. to 35 ° C.), or is heated or polymerized with light, and the artificial tooth 12 is finally bonded to the denture base 14 (main bonding step). A plate denture is manufactured as described above.

In the manufacturing method of the second embodiment, when there are teeth that require correction of tooth arrangement and shape adjustment in a state where the artificial teeth 12 are temporarily fixed to the denture base 14 (FIG. 2B), The target tooth can be removed, and the tooth whose shape has been adjusted can be fixed (temporarily fixed) at the same position using the same temporary fixing material 10 again. Even in a state where the artificial tooth 12 is preliminarily bonded to the denture base 14 (FIG. 2D), the above-described tooth arrangement can be corrected until the polymerization of the specific acrylic resin 24 proceeds. Therefore, when the artificial tooth is arranged in the socket part of the denture base, the position adjustment of the artificial tooth can be performed with high accuracy.
Moreover, in the manufacturing method of 2nd Embodiment, this adhesion | attachment is performed in the state which pre-bonded the artificial tooth 12 to the denture base 14. FIG. Thereby, like the first embodiment, the artificial teeth can be permanently bonded at an appropriate position in which lifting is suppressed.
Furthermore, in the manufacturing method according to the second embodiment, since the main bonding is performed after removing the temporarily fixing material, the amount of the resin used for the main bonding is more easily adjusted, and the resin is more easily removed from the gap between the artificial teeth. It becomes difficult to protrude. For this reason, it is easier to obtain a denture with superior aesthetics.

  Hereinafter, the embodiment of the present embodiment will be described more specifically by way of examples. However, the present embodiment is not limited to the following examples unless it exceeds the gist of the present embodiment.

[Example 1]
A rectangular temporary fixing material (length 150 mm, width 10 mm, thickness 4 mm) was produced using a silicone putty (manufactured by Tack Systems, trade name: model block).
Resin teeth made of acrylic resin were placed as artificial teeth on an artificial tooth socket portion (hereinafter also simply referred to as “socket portion”) of a denture base made of acrylic resin produced using a CAD / CAM system. After that, the temporary fixing material is placed outside the gingiva so as to cover the gingival part of the denture base (the boundary part of the crown and root), and the artificial tooth is temporarily fixed to the denture base, so that the socket part and the artificial part are artificially fixed. The positional relationship with the teeth was maintained.
Thereafter, the denture base on which the artificial tooth was temporarily fixed was scanned using a scanner (R700 manufactured by 3Shape) and image processing software (manufactured by WENZEL Prazision GmbH, Point Master) to check whether or not the position of the artificial tooth was adjusted.
As a result of the above check, it was necessary to correct the position of the two artificial teeth, so the tooth angle was adjusted in this state. In addition, since it was necessary to adjust the shape of the four artificial teeth, the target tooth was once removed, and the tooth whose shape was adjusted was temporarily fixed at the same position again using the same temporary fixing material.
Next, using the Paraexpress Ultra made by Heraeus Kultzer as an acrylic resin, it is injected from the inside of the gingiva (to the lingual side) into the gap between the artificial teeth, and then the acrylic resin is used as a pressure cooker for polymerization (Toho Dentistry) Sangyo Co., Ltd .: pressure pot S) was used for polymerization for 30 minutes at 55 ° C. and 2 atm to fully bond the artificial tooth and the denture base. Thereafter, the temporarily fixing material was removed. Thereby, a plate denture was produced. In addition, injection | pouring of acrylic resin was performed using the syringe.

[Example 2]
Resin teeth made of acrylic resin were placed as artificial teeth in a socket part of a denture base made of acrylic resin produced using a CAD / CAM system. Then, the same temporary fixing material as in Example 1 is placed on the outside of the gingiva so as to cover the gingival part of the denture base (the boundary part of the crown and root), and the artificial tooth is temporarily fixed to the denture base, The positional relationship between the socket part and the artificial tooth was maintained.
Thereafter, the denture base on which the artificial tooth was temporarily fixed was scanned using a scanner (R700 manufactured by 3Shape) and image processing software (manufactured by WENZEL Prazision GmbH, Point Master) to check whether or not the position of the artificial tooth was adjusted.
As a result of the above check, it was necessary to correct the position of the two artificial teeth, so the tooth angle was adjusted in this state. Moreover, since it was necessary to adjust the shape of one artificial tooth, the target tooth was once removed, and the tooth whose shape was adjusted was temporarily fixed at the same position again using the same temporary fixing material.
Using specified bright resin (rapid curing room temperature polymerization resin) manufactured by Yamahachi Dental Industry Co., Ltd. as the specific acrylic resin, the specific acrylic resin is injected into the gap between the socket part and the artificial tooth, and then at room temperature (25 ° C) Then, the specific acrylic resin was polymerized (cured) by allowing it to stand for 4 minutes, and the artificial teeth were preliminarily bonded to the socket part.
Next, the temporary fixing material is removed, and then the acrylic resin is injected into the gap between the artificial teeth from the inside of the gingiva (the lingual side) using a Paraexpress Ultra made by Heraeus Kultzer, and then the acrylic resin Was polymerized for 30 minutes at 55 ° C. and 2 atm using a pressure cooker for polymerization (manufactured by Toho Dental Sangyo Co., Ltd .: Pressure Pot S) to fully bond the artificial tooth and the denture base. Thereby, a plate denture was produced. In addition, injection | pouring of specific acrylic resin and injection | pouring of acrylic resin were performed using the syringe.

[Comparative Example 1]
After dripping the Heraeus-Kurzer Paraexpress Ultra as an acrylic resin on the socket part of an acrylic resin-made denture base produced using a CAD / CAM system, an acrylic resin resin tooth as an artificial tooth, It left still in the said several socket part by which acrylic resin was dripped. In order to prevent the artificial teeth from lifting, the denture was continued to be pressed with the finger until the adhesive was hardened to prepare a denture.

[Position adjustment of artificial teeth]
The ease of position adjustment of the artificial teeth was evaluated by comparing Examples 1 and 2 with Comparative Example 1.
When the dentures were produced according to the procedures shown in Examples 1 and 2, the artificial teeth were temporarily fixed to the denture base by the temporary fixing material, so that the tooth position could be easily corrected. In addition, when it was necessary to adjust the shape of the tooth, the artificial tooth was immediately removed from the denture base, and the tooth whose shape was adjusted could be easily rearranged.
Therefore, it was found that when a denture was prepared according to the procedure shown in Examples 1 and 2, the position of the artificial tooth could be adjusted with high accuracy when the artificial tooth was placed in the denture base socket. Moreover, the dentures obtained by the procedures shown in Examples 1 and 2 were those in which the occlusal height was accurately adjusted.
Moreover, when the plate denture was produced according to the procedure shown in Example 2, it was further suppressed that the acrylic resin protruded from the gap between the artificial teeth. Therefore, it was found that a denture with superior aesthetics can be obtained by pre-bonding the artificial tooth to the denture base.
On the other hand, when a denture is produced by the procedure shown in Comparative Example 1, the protrusion of the adhesive from the socket portion of the denture base occurs, or the artificial tooth misalignment (position) while the artificial tooth is being pressed with a finger. The problem of misalignment) occurred.

[Dental modification time]
The tooth correction time was evaluated by comparing Examples 1 and 2 with Comparative Example 1.
In Example 1, the time required for position correction of two artificial teeth and shape adjustment of four artificial teeth was 4 minutes (position correction 1 minute + shape correction 3 minutes). In Example 2, the time required for the position correction of two artificial teeth and the shape adjustment of one artificial tooth is 4 minutes (position correction 1 minute + shape correction 3 minutes), and then preliminary bonding is performed. Furthermore, it took only 5 minutes (injection of specific acrylic resin 1 minute + polymerization of specific acrylic resin 4 minutes).
On the other hand, in Comparative Example 1, an attempt was made to remove an artificial tooth that requires shape adjustment from the denture base, but neither tooth could be removed. In this case, it is necessary to prepare the denture base again and bond the artificial tooth to the denture base. However, this time is long because it includes milling (cutting). Specifically, one correction time, that is, the time until the denture base is made again and the artificial tooth is permanently bonded to the denture base is about 3 hours. If the denture base is prepared twice, it takes about 3 hours × 2 times = about 6 hours.
Thus, in Example 1, the time required for tooth position correction and shape adjustment was several minutes (4 minutes), and in Example 2, the above time was 9 minutes including the time for pre-adhesion. . In contrast, in Comparative Example 1, it takes several hours to adjust the tooth shape.
Therefore, it was found that the production time was shortened by preparing a plate denture by the methods of Examples 1 and 2.

10 Temporary Fixing Materials, 12 Artificial Teeth, 14 Denture Base, 20 Injector, 22 Injector, 24 Specific Acrylic Resin, 100 Plated Denture

Claims (6)

A step of temporarily fixing an artificial tooth to a denture base using a temporary fixing material;
Bonding the temporarily fixed artificial tooth to the denture base;
A method for manufacturing a denture containing a denture.   The method for producing a denture according to claim 1, wherein the bonding step is a step of permanently bonding the artificial tooth to the denture base using an acrylic resin. The step of adhering includes pre-adhering the artificial tooth to the denture base,
Removing the temporary fixing material;
A step of permanently adhering the artificial tooth to the denture base using an acrylic resin;
The method for producing a denture according to claim 1, comprising:   The method for producing a denture according to claim 3, wherein the pre-adhering step is a step of pre-adhering the artificial tooth to at least a part of the concave portion of the denture base.   The said temporary fixing material is an adhesive material which deform | transforms at 25 degreeC, The manufacturing method of the base denture of any one of Claims 1-4.   The method for manufacturing a denture according to any one of claims 1 to 5, further comprising a step of producing the denture base by a CAD / CAM system before the step of temporarily fixing.