JP2022054094A - Resin material - Google Patents

Abstract

To provide a resin material which is hard to impart a sense of discomfort to a wearer when being molded and attached as a mouthpiece, and facilitates attaching a mouthpiece to teeth.SOLUTION: A resin material 4 to be used for a mouthpiece comprises: a thermoplastic polyurethane-containing polyurethane layer 4A which is a layer facing teeth when being attached to the teeth; a thermoplastic polyurethane-containing polyurethane layer 4B joined to the polyurethane layer 4A; and a polyester-containing polyester layer 4C which is a layer positioned outside when being attached to the teeth and is joined to the polyurethane layer 4B. The total thickness thereof is 600 μm or more and 1,000 μm or less.SELECTED DRAWING: Figure 4

Description

The present invention relates to a resin material used for a mouthpiece, particularly an orthodontic mouthpiece.

The mouthpiece mounted along the dentition is formed by crimping the sheet material to the tooth model while heating it. Some mouthpieces are for orthodontics, and the orthodontic mouthpieces can be put on and taken off by the wearer himself, not only by the dental care worker.

The following Patent Document 1 discloses an invention relating to a dental molded body, wherein the dental molded body is a material of a mouthpiece for orthodontics, and the dental molded body (sheet) is described. , Cycloolefin polymer resin is described.

International Publication No. 2004/049967

The sheet material of the mouthpiece is required to have an elastic force capable of applying pressure to the dentition so that the dentition can be corrected when it is molded as a mouthpiece and attached to the dentition. Further, the sheet material of the mouthpiece is required to be easy to mold so as to be deformed into a shape corresponding to the tooth model when the mouthpiece is manufactured.

Further, when the mouthpiece is worn along the dentition, there is a portion where the mouthpiece comes into contact with the oral cavity such as the gums, so it is desirable that the wearer does not feel uncomfortable as much as possible. Furthermore, since the mouthpiece is frequently attached and detached by the wearer during the orthodontic treatment period, it is preferable that the wearer can easily put on the mouthpiece.

The present invention has been made in view of such circumstances, and when it is molded and worn as a mouthpiece, it does not easily cause a sense of discomfort to the wearer, and the mouthpiece can be easily attached to the teeth. It is an object of the present invention to provide a resin material that can be attached.

In order to solve the above problems, the resin material of the present invention adopts the following means.
That is, the resin material according to the present invention is a resin material used for a mouthpiece, which is composed of a polyurethane layer containing thermoplastic polyurethane and has a total thickness of 700 μm or more and 800 μm or less.

The resin material according to the present invention is a resin material used for a mouthpiece, which is a layer facing the tooth when attached to the tooth, and is a first polyester layer containing polyester and the first polyester layer. It is provided with a polyurethane layer bonded to the polyurethane layer and containing a thermoplastic polyurethane, and a second polyester layer which is a layer located on the outer side when attached to the tooth and is bonded to the polyurethane layer and contains polyester. The thickness is 600 μm or more and 900 μm or less.

The resin material according to the present invention is a resin material used for a mouthpiece, which is a layer facing the tooth when attached to the tooth, and is attached to the tooth with a polyurethane layer containing thermoplastic polyurethane. It is a layer located on the outer side, which is bonded to the polyurethane layer and includes a polyester layer containing polyester, and has a total thickness of 600 μm or more and 1000 μm or less.

The resin material according to the present invention is a resin material used for a mouthpiece, which is a layer facing the teeth when attached to the teeth, and includes a first polyurethane layer containing thermoplastic polyurethane and the first polyurethane layer. A second polyurethane layer bonded to the polyurethane layer and containing thermoplastic polyurethane, and a layer located on the outside when attached to the tooth, which is bonded to the second polyurethane layer and contains polyester. The total thickness is 600 μm or more and 1000 μm or less.

As the resin material according to the present invention, the polyester may be polyethylene terephthalate (PET), glycol-modified polyethylene terephthalate (PETG) or acid-modified polycyclohexanedimethylene terephthalate (PCTA).

As the resin material according to the present invention, the thermoplastic polyurethane may be a polyester-based polyurethane, a polyether-based polyurethane, a polyester-ether-based polyurethane, or a polycarbonate-based polyurethane.

According to the present invention, when it is molded and mounted as a mouthpiece, it is less likely to cause a sense of discomfort to the wearer, and the mouthpiece can be easily mounted on the teeth.

It is sectional drawing which shows the resin material which concerns on 1st Embodiment of this invention. It is an exploded sectional view which shows the resin material which concerns on 2nd Embodiment of this invention. It is an exploded sectional view which shows the resin material which concerns on 3rd Embodiment of this invention. It is an exploded sectional view which shows the resin material which concerns on 4th Embodiment of this invention.

[First Embodiment]
The resin material 1 according to the first embodiment of the present invention is used, for example, to form an orthodontic mouthpiece (also referred to as an aligner) as a molded product. The resin material 1 is in the form of a sheet and has a total thickness of, for example, 700 μm or more and 800 μm or less.

The resin material 1 is formed as a mouthpiece by pressure-bonding the resin material 1 to a tooth model formed based on the wearer's teeth while heating. The mouthpiece is not limited to those for orthodontics, and may be used for other purposes.

As shown in FIG. 1, the resin material 1 is composed of only the polyurethane layer 1A containing the thermoplastic polyurethane (TPU). The thermoplastic polyurethane is, for example, a polyester-based polyurethane, a polyether-based polyurethane, a polyester-ether-based polyurethane, a polycarbonate-based polyurethane, or the like. The thermoplastic polyurethane may be a polyurethane resin or a polyurethane elastomer. The polyurethane layer 1A is, for example, a TPU resin layer. The resin material 1 has a indentation hardness (hardness) of 75 or more.

The resin material 1 used for the mouthpiece has an elastic force capable of applying pressure to the dentition so that the dentition can be corrected when it is molded as a mouthpiece and attached to the dentition. Further, the resin material 1 has a property of being deformed into a shape corresponding to the tooth model when pressed against the tooth model and manufactured as a mouthpiece.

Further, the resin material 1 has a predetermined hardness and elastic force, so that when the mouthpiece made of the resin material 1 is attached along the dentition, it is attached to the wearer at a portion that comes into contact with the oral cavity such as the gums. It is hard to cause a feeling of strangeness. The resin material 1 is a layer containing thermoplastic polyurethane on the side facing the teeth and has a predetermined hardness and elastic force, so that the mouthpiece can be easily attached. This makes it easier for the wearer to put on and take off the mouthpiece during the orthodontic treatment period.

[Second Embodiment]
The resin material 2 according to the second embodiment of the present invention is used, for example, to form an orthodontic mouthpiece (also referred to as an aligner) as a molded product. The resin material 2 is in the form of a sheet and has a total thickness of, for example, 600 μm or more and 900 μm or less.

The resin material 2 is formed as a mouthpiece by pressure-bonding the resin material 2 to a tooth model formed based on the wearer's teeth while heating. The mouthpiece is not limited to those for orthodontics, and may be used for other purposes.

As shown in FIG. 2, the resin material 2 has a three-layer structure, and each layer is formed as a mouthpiece, and the polyester layer 2A and the polyurethane layer 2B are formed from the side facing the tooth when the mouthpiece is attached to the tooth. , The polyester layer 2C are arranged in this order. In the resin material 2 according to the present embodiment, the polyurethane layer 2B is softer than the polyester layer 2A and the polyester layer 2C, and the hardness of the polyester layer 2A and the polyester layer 2C is almost the same. That is, the resin material 2 has a structure in which a soft material is sandwiched in the middle. The polyester layer 2A is an example of the first polyester layer, and the polyester layer 2C is an example of the second polyester layer.

The polyester layer 2A is a layer facing the tooth when the mouthpiece is attached to the tooth, and contains polyester. The polyester is, for example, polyethylene terephthalate (PET), glycol-modified polyethylene terephthalate (PETG), acid-modified polycyclohexanedimethylene terephthalate (PCTA), or the like. The polyester may be a resin or an elastomer. The polyester layer 2A has a thickness of, for example, 200 μm or more and 300 μm or less. The polyester layer 2A is, for example, a PET resin layer.

The polyurethane layer 2B is bonded to the polyester layer 2A and contains a thermoplastic polyurethane. The thermoplastic polyurethane is, for example, a polyester-based polyurethane, a polyether-based polyurethane, a polyester-ether-based polyurethane, a polycarbonate-based polyurethane, or the like. The thermoplastic polyurethane may be a polyurethane resin or a polyurethane elastomer. The polyurethane layer 2B has a thickness of, for example, 200 μm or more and 300 μm or less. The polyurethane layer 2B has an indentation hardness (hardness) of 75 or more. The polyurethane layer 2B is, for example, a TPU resin layer.

The bonding between the polyester layer 2A and the polyurethane layer 2B is performed by a conventional technique used when laminating a plurality of resin layers or elastomer layers. The polyester layer 2A and the polyurethane layer 2B may be joined so as to be adjacent to each other via another substance.

The polyester layer 2C is a layer bonded to the polyurethane layer 2B and located on the outside when the mouthpiece is attached to the tooth, and contains polyester. The polyester is, for example, polyethylene terephthalate (PET), glycol-modified polyethylene terephthalate (PETG), acid-modified polycyclohexanedimethylene terephthalate (PCTA), or the like. The polyester may be a resin or an elastomer. The polyester layer 2C has a thickness of, for example, 200 μm or more and 300 μm or less. The polyester layer 2C is, for example, a PET resin layer.

The bonding between the polyurethane layer 2B and the polyester layer 2C is performed by a conventional technique used when laminating a plurality of resin layers or elastomer layers. The polyurethane layer 2B and the polyester layer 2C may be joined so as to be adjacent to each other via another substance.

The resin material 2 used for the mouthpiece has a structure in which a soft material is sandwiched in the middle, and when it is molded as a mouthpiece and attached to the dentition, the dentition can be corrected so that the dentition can be corrected. It has an elastic force that can apply pressure. Further, the resin material 2 has a property of being deformed into a shape corresponding to the tooth model when pressed against the tooth model and manufactured as a mouthpiece.

Further, the resin material 2 has a predetermined hardness and elastic force, so that when the mouthpiece made of the resin material 2 is worn along the dentition, it is attached to the wearer at a portion that comes into contact with the oral cavity such as the gums. It is hard to cause a feeling of strangeness. Further, since the resin material 2 has a high hardness on the outside, that is, on the occlusal side, wear due to use can be reduced and durability is improved. Since the resin material 2 has a predetermined hardness and elastic force, the mouthpiece can be easily attached. This makes it easier for the wearer to put on and take off the mouthpiece during the orthodontic treatment period.

[Third Embodiment]
The resin material 3 according to the third embodiment of the present invention is used, for example, to form an orthodontic mouthpiece (also referred to as an aligner) as a molded product. The resin material 3 is in the form of a sheet and has a total thickness of, for example, 600 μm or more and 1000 μm or less.

The resin material 3 is formed as a mouthpiece by pressure-bonding the resin material 3 to a tooth model formed based on the wearer's teeth while heating. The mouthpiece is not limited to those for orthodontics, and may be used for other purposes.

As shown in FIG. 3, the resin material 3 has a two-layer structure, and each layer is formed as a mouthpiece, and the polyurethane layer 3A and the polyester layer 3B are formed from the side facing the tooth when the mouthpiece is attached to the tooth. Are arranged in the order of. In the resin material 3 according to the present embodiment, the polyurethane layer 3A is softer than the polyester layer 3B. That is, the plurality of layers constituting the resin material 3 have higher hardness in order from the side facing the tooth when the mouthpiece is attached to the tooth.

The polyurethane layer 3A is a layer facing the tooth when the mouthpiece is attached to the tooth, and contains thermoplastic polyurethane. The thermoplastic polyurethane is, for example, a polyester-based polyurethane, a polyether-based polyurethane, a polyester-ether-based polyurethane, a polycarbonate-based polyurethane, or the like. The thermoplastic polyurethane may be a polyurethane resin or a polyurethane elastomer. The polyurethane layer 3A has a thickness of, for example, 200 μm or more and 400 μm or less. The polyurethane layer 3A has an indentation hardness (hardness) of 75 or more. The polyurethane layer 3A is, for example, a TPU resin layer.

The polyester layer 3B is a layer bonded to the polyurethane layer 3A and located on the outside when the mouthpiece is attached to the tooth, and contains polyester. The polyester is, for example, polyethylene terephthalate (PET), glycol-modified polyethylene terephthalate (PETG), acid-modified polycyclohexanedimethylene terephthalate (PCTA), or the like. The polyester may be a resin or an elastomer. The polyester layer 3B has a thickness of, for example, 400 μm or more and 600 μm or less. The polyester layer 3B is, for example, a PET resin layer.

The bonding between the polyurethane layer 3A and the polyester layer 3B is performed by a conventional technique used when laminating a plurality of resin layers or elastomer layers. The polyurethane layer 3A and the polyester layer 3B may be joined so as to be adjacent to each other via another substance.

The resin material 3 used for the mouthpiece has an elastic force capable of applying pressure to the dentition so that the dentition can be corrected when it is molded as a mouthpiece and attached to the dentition. Further, the resin material 3 has a property of being deformed into a shape corresponding to the tooth model when pressed against the tooth model and manufactured as a mouthpiece.

Further, since the resin material 3 is a layer containing thermoplastic polyurethane on the side facing the teeth and has a predetermined hardness and elastic force, when the mouthpiece is attached along the dentition, it is in the oral cavity such as the tooth stalk. The mouthpiece can be easily attached without causing a sense of discomfort to the wearer at the portion where the mouthpiece comes into contact with. This makes it easier for the wearer to put on and take off the mouthpiece during the orthodontic treatment period.

In the resin material 3 according to the present embodiment, the polyurethane layer 3A is softer than the polyester layer 3B, so that when the mouthpiece made of the resin material 3 is attached to the tooth, the hardness increases in order from the side facing the tooth. .. As a result, when the mouthpiece made of the resin material 3 is attached along the dentition, it is less likely to cause a sense of discomfort to the wearer at a portion of the oral cavity such as the gums that comes into contact with the mouthpiece. Since the resin material 3 has a high hardness on the outside, that is, on the occlusal side, wear due to use can be reduced and durability is improved.

Further, the resin material 3 is a layer containing thermoplastic polyurethane on the side facing the teeth, and the polyurethane layer 3A is softer than the polyester layer 3B, so that the mouthpiece can be easily attached. This makes it easier for the wearer to put on and take off the mouthpiece during the orthodontic treatment period.

[Fourth Embodiment]
The resin material 4 according to the fourth embodiment of the present invention is used, for example, to form an orthodontic mouthpiece (also referred to as an aligner) as a molded product. The resin material 4 is in the form of a sheet and has a total thickness of, for example, 600 μm or more and 1000 μm or less.

The resin material 4 is formed as a mouthpiece by pressure-bonding the resin material 4 to a tooth model formed based on the wearer's teeth while heating. The mouthpiece is not limited to those for orthodontics, and may be used for other purposes.

As shown in FIG. 4, the resin material 4 has a three-layer structure, and each layer is formed as a mouthpiece, and the polyurethane layer 4A and the polyurethane layer 4B are formed from the side facing the tooth when the mouthpiece is attached to the tooth. , The polyester layer 4C is arranged in this order. In the resin material 4 according to the present embodiment, the polyurethane layer 4B is softer than the polyester layer 4C, and the polyurethane layer 4A is softer than the polyurethane layer 4B. That is, the plurality of layers constituting the resin material 4 have higher hardness in order from the side facing the tooth when the mouthpiece is attached to the tooth. The polyurethane layer 4A is an example of the first polyurethane layer, and the polyurethane layer 4B is an example of the second polyurethane layer.

The polyurethane layer 4A is a layer facing the tooth when the mouthpiece is attached to the tooth, and contains thermoplastic polyurethane. The thermoplastic polyurethane is, for example, a polyester-based polyurethane, a polyether-based polyurethane, a polyester-ether-based polyurethane, a polycarbonate-based polyurethane, or the like. The thermoplastic polyurethane may be a polyurethane resin or a polyurethane elastomer. The polyurethane layer 4A has a thickness of, for example, 150 μm or more and 250 μm or less. The polyurethane layer 4A has an indentation hardness (hardness) of 75 or more. The polyurethane layer 4A is, for example, a TPU resin layer.

The polyurethane layer 4B is bonded to the polyurethane layer 4A and contains a thermoplastic polyurethane. The thermoplastic polyurethane is, for example, a polyester-based polyurethane, a polyether-based polyurethane, a polyester-ether-based polyurethane, a polycarbonate-based polyurethane, or the like. The thermoplastic polyurethane may be a polyurethane resin or a polyurethane elastomer. The polyurethane layer 4B has a thickness of, for example, 150 μm or more and 250 μm or less. The polyurethane layer 4B has an indentation hardness (hardness) of 75 or more. The polyurethane layer 4B is, for example, a TPU resin layer.

Both the polyurethane layer 4A and the polyurethane layer 4B contain thermoplastic polyurethane, but the polyurethane layer 4A is softer than the polyurethane layer 4B, and the polyurethane layer 4B is harder than the polyurethane layer 4A.

The bonding between the polyurethane layer 4A and the polyurethane layer 4B is performed by the technique used when laminating a plurality of resin layers or elastomer layers. The polyurethane layer 4A and the polyurethane layer 4B may be joined so as to be adjacent to each other via another substance.

The polyester layer 4C is a layer bonded to the polyurethane layer 4B and located on the outside when the mouthpiece is attached to the tooth, and contains polyester. The polyester is, for example, polyethylene terephthalate (PET), glycol-modified polyethylene terephthalate (PETG), acid-modified polycyclohexanedimethylene terephthalate (PCTA), or the like. The polyester may be a resin or an elastomer. The polyester layer 4C has a thickness of, for example, 300 μm or more and 500 μm or less. The polyester layer 4C is, for example, a PET resin layer.

The bonding between the polyurethane layer 4B and the polyester layer 4C is performed by the technique used when laminating a plurality of resin layers or elastomer layers. The polyurethane layer 4B and the polyester layer 4C may be joined so as to be adjacent to each other via another substance.

The resin material 4 used for the mouthpiece has an elastic force capable of applying pressure to the dentition so that the dentition can be corrected when it is molded as a mouthpiece and attached to the dentition. Further, the resin material 4 has a property of being deformed into a shape corresponding to the tooth model when pressed against the tooth model and manufactured as a mouthpiece.

Further, in the resin material 4 according to the present embodiment, the polyurethane layer 4B is softer than the polyester layer 4C, and the polyurethane layer 4A is softer than the polyurethane layer 4B. Therefore, when the mouthpiece made of the resin material 4 is attached to the tooth. , The hardness increases in order from the side facing the teeth. As a result, when the mouthpiece is attached along the dentition, it is less likely to cause a sense of discomfort to the wearer at a portion of the oral cavity such as the gums that comes into contact with the mouthpiece. Since the resin material 4 has a high hardness on the outside, that is, on the occlusal side, wear due to use can be reduced and durability is improved.

Further, the resin material 4 is a layer containing thermoplastic polyurethane on the side facing the teeth, and the polyurethane layer 4A is softer than the polyurethane layer 4B, so that the mouthpiece can be easily attached. This makes it easier for the wearer to put on and take off the mouthpiece during the orthodontic treatment period.

1,2,3,4 Resin material 1A Polyurethane layer 2A Polyester layer (first polyester layer)
2B polyurethane layer 2C polyester layer (second polyester layer)
3A Polyurethane layer 3B Polyester layer 4A Polyurethane layer (first polyurethane layer)
4B polyurethane layer (second polyurethane layer)
4C polyester layer

Claims (6)

A resin material used for mouthpieces
Consists of a polyurethane layer containing thermoplastic polyurethane
A resin material having a total thickness of 700 μm or more and 800 μm or less. A resin material used for mouthpieces
A first polyester layer containing polyester, which is a layer facing the tooth when attached to the tooth,
A polyurethane layer bonded to the first polyester layer and containing a thermoplastic polyurethane,
A second polyester layer that is located on the outside when attached to the tooth and is joined to the polyurethane layer and contains polyester.
Equipped with
A resin material having a total thickness of 600 μm or more and 900 μm or less. A resin material used for mouthpieces
A layer facing the tooth when attached to the tooth, and a polyurethane layer containing thermoplastic polyurethane,
A layer located on the outside when attached to the tooth, the polyester layer bonded to the polyurethane layer and containing polyester, and the polyester layer.
Equipped with
A resin material having a total thickness of 600 μm or more and 1000 μm or less. A resin material used for mouthpieces
A first polyurethane layer containing thermoplastic polyurethane, which is a layer facing the tooth when attached to the tooth,
A second polyurethane layer bonded to the first polyurethane layer and containing a thermoplastic polyurethane,
A layer located on the outside when attached to the tooth, the polyester layer bonded to the second polyurethane layer and containing polyester, and the polyester layer.
Equipped with
A resin material having a total thickness of 600 μm or more and 1000 μm or less. The resin material according to any one of claims 2 to 4, wherein the polyester is polyethylene terephthalate (PET), glycol-modified polyethylene terephthalate (PETG), or acid-modified polycyclohexanedimethylene terephthalate (PCTA). The resin material according to any one of claims 1 to 5, wherein the thermoplastic polyurethane is a polyester-based polyurethane, a polyether-based polyurethane, a polyester-ether-based polyurethane, or a polycarbonate-based polyurethane.

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