Dental intraoral device and its manufacturing method

Abstract

Provided is an intraoral dental device that makes it possible to reduce the thickness of a base section while being strong and having fracture resistance characteristics.　The intraoral dental device (an orthodontic aligner (20)) is worn in the oral cavity (upper jaw (16)) and is provided with a base section (30) that is made from a resin and that follows the shape of the oral cavity (upper jaw (16)). At least part of the base section (30) is formed as a mesh. The intraoral dental device (the orthodontic aligner (20)) ensures a predetermined strength while widening the oral cavity and not interfering with conversation or meals when worn.

Description

[Technical Field]

[0001] The present invention relates to a dental intraoral device to be worn in the oral cavity and a method for manufacturing the same. [Background technology]

[0002] Mouthpiece-type oral devices, such as orthodontic aligners and oral appliances (OA) for treating sleep apnea syndrome, are formed by pressing a plate-shaped resin sheet onto a dental arch model. Oral devices, such as denture bases, are typically formed by mixing a polymer powder, such as PMMA, with a monomer liquid, such as MMA, followed by thermal curing. In order to improve the strength and fracture resistance of these oral devices, oral devices with bases are known (see, for example, Patent Documents 1 and 2).

[0003] Patent Document 1 discloses a denture with a denture base and artificial teeth placed on the denture base. Patent Document 2 discloses a mandibular advancement device for treating sleep apnea syndrome and / or snoring, which has a base shaped to cover the gums. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-130286 [Patent Document 2] International Publication No. 2000 / 001317 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the denture base described in Patent Document 1 and the mandibular advancement device for treating sleep apnea syndrome and / or snoring described in Patent Document 2 are molded in a solid shape, which creates the problem that the thickness of the base becomes thick in order to ensure strength and fracture resistance.

[0006] Therefore, an object of the present invention is to provide a dental intraoral appliance that has strength and fracture resistance properties while allowing the thickness of the dental base to be reduced. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the dental oral device of the present invention is a dental oral device that is worn in the oral cavity, and is characterized in that it has a resin base that conforms to the shape of the oral cavity, and at least a portion of the base is formed in a mesh shape. [Effects of the Invention]

[0008] The dental intraoral appliance of the present invention configured in this manner allows the thickness of the dental base to be thin while still maintaining strength and fracture resistance. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is an exploded perspective view showing an orthodontic aligner and an upper jaw according to a first embodiment. [Figure 2] FIG. 1 is a cross-sectional view showing the orthodontic aligner of Example 1 attached to the oral cavity. [Figure 3] FIG. 2 is a perspective view showing a unit area of ​​the floor portion of the first embodiment. [Figure 4] FIG. 10 is a perspective view showing a unit area of ​​a modified example of the first embodiment. [Figure 5] FIG. 10 is a perspective view showing a unit area of ​​a modified example of the first embodiment. [Figure 6] FIG. 10 is a perspective view showing a unit area of ​​a floor portion of a second embodiment. [Figure 7] FIG. 10 is an exploded perspective view showing the orthodontic aligner and upper jaw of Example 3. [Figure 8] FIG. 10 is a perspective view showing a unit area of ​​a floor portion of another embodiment. [Figure 9A] FIG. 10 is a plan view showing a unit area of ​​a floor portion of another embodiment. [Figure 9B] FIG. 10 is a plan view showing a unit area of ​​a floor portion of another embodiment. [Figure 10A] FIG. 10 is a plan view showing a unit area of ​​a floor portion of another embodiment. [Figure 10B] FIG. 10 is a plan view showing a unit area of ​​a floor portion of another embodiment. [Figure 11A] FIG. 10 is a plan view showing a unit area of ​​a floor portion of another embodiment. [Figure 11B] FIG. 10 is a plan view showing a unit area of ​​a floor portion of another embodiment. [Figure 12] FIG. 10 is a plan view showing a unit area of ​​a floor portion of another embodiment. [Figure 13] FIG. 10 is a perspective view showing a unit area of ​​a floor portion of another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments for realizing a dental intraoral device according to the present invention will be described based on Examples 1 to 3 shown in the drawings. [Example]

[0011] The dental intraoral device in Example 1 is applied to an orthodontic aligner that is worn in the oral cavity to cover the teeth of the upper jaw.

[0012] [Configuration of orthodontic aligners] FIG. 1 is an exploded perspective view showing an orthodontic aligner and an upper jaw of Example 1. FIG. 2 is a cross-sectional view showing the orthodontic aligner of Example 1 fitted into the oral cavity. FIG. 3 is a perspective view showing a unit area of ​​a base portion of Example 1. FIG. 4 is a perspective view showing a unit area of ​​a modified example of Example 1. FIG. 5 is a perspective view showing a unit area of ​​a modified example of Example 1. The configuration of the orthodontic aligner of Example 1 will be described below.

[0013] The orthodontic aligner 20 is formed by a three-dimensional modeling device based on three-dimensional data. The orthodontic aligner 20 is attached to the teeth 10 before orthodontic treatment, and corrects the teeth 10 to their orthodontic target positions.

[0014] 1, a tooth 10 is supported by gums 15 that surround the base of the tooth 10. The portion that actually protrudes from the gums 15 in the oral cavity constitutes a crown 11.

[0015] As shown in the bottom view of Fig. 1 and Fig. 2, the orthodontic aligner 20 comprises a crown portion 21 formed in a groove shape so as to cover the crown 11, and a base portion 30 connecting the palatal edges of the crown portion 21. The base portion 30 is formed to a predetermined thickness H according to the shape of the upper jaw 16. The thickness H can be 0.8 mm or less and 0.05 mm or more. Preferably, the thickness H can be 0.7 mm or less.

[0016] As shown in Figures 1 and 3, the floor portion 30 is formed in a mesh shape with unit areas 31 having holes 31b arranged in a generally regular pattern. A mesh shape refers to a regular, or at least partially random, three-dimensional mesh structure. Note that Figure 1 shows an enlarged view of some of the unit areas 31. In Example 1, the entire floor portion 30 is formed in a mesh shape, but only a portion of the floor portion 30 may be formed in a mesh shape. Figures 3 to 5 show an example of the unit area 31.

[0017] (The unit area is a regular hexagon) 3, in this embodiment, the cross-sectional shape of the unit area 31 is a regular hexagon, which is a regular polygon that can fill a plane with a single type of polygon. The unit area 31 is formed into a cylindrical shape with regular hexagonal side walls 31a in a plan view, and has holes 31b that penetrate in the vertical direction. These holes 31b allow saliva, heat, etc. to be transmitted to the upper jaw 16.

[0018] The length L of one side of the unit area 31 is preferably, for example, 0.1 mm or more in terms of saliva permeability, and is preferably 5.0 mm or less in terms of ensuring strength. The thickness T of the side wall 31a can be set to a predetermined value (for example, 0.02 mm). The ratio L / T of the thickness T to the length L is preferably 1.25 to 50, more preferably 1.5 to 40, and even more preferably 2.0 to 30. When the ratio L / T of the thickness T to the length L is 1.25 or more, saliva can easily pass through, and when the ratio L / T of the thickness T to the length L is 50 or less, the side wall 31a constituting the side is less likely to buckle.

[0019] (The unit area is an equilateral triangle) 4, the cross-sectional shape of the unit area 31 in another example is formed as an equilateral triangle, which is a regular polygon that can fill a plane with a single type of polygon. The unit area 31 is formed into a cylindrical shape with equilateral triangular side walls 31a in a plan view, and has holes 31b that penetrate in the vertical direction. These holes 31b allow saliva, heat, etc. to be transmitted to the upper jaw 16.

[0020] The length L of one side of the unit area 31 is preferably, for example, 0.1 mm or more in terms of saliva permeability, and is preferably 5.0 mm or less in terms of ensuring strength. The thickness T of the side wall 31a can be set to a predetermined value (for example, 0.02 mm). The ratio L / T of the thickness T to the length L is preferably 2.5 to 100, more preferably 3.0 to 90, and even more preferably 3.5 to 80. When the ratio L / T of the thickness T to the length L is 2.5 or more, saliva can easily pass through, and when the ratio L / T of the thickness T to the length L is 100 or less, the side wall 31a constituting the side is less likely to buckle.

[0021] (The unit area is a regular rectangle) 5, the cross-sectional shape of a unit area 31 in another example is a regular square, which is a regular polygon that can fill a plane with a single type of polygon. The unit area 31 is formed into a cylindrical shape with square side walls 31a in a plan view, and has holes 31b that penetrate in the vertical direction. These holes 31b allow saliva, heat, etc. to be transmitted to the upper jaw 16.

[0022] The length L of one side of the unit area 31 is preferably, for example, 0.1 mm or more in terms of saliva permeability, and is preferably 5.0 mm or less in terms of ensuring strength. The thickness T of the side wall 31a can be set to a predetermined value (for example, 0.02 mm). The ratio L / T of the thickness T to the length L is preferably 2.0 to 80, more preferably 2.5 to 70, and even more preferably 3.0 to 60. When the ratio L / T of the thickness T to the length L is 2.0 or more, saliva can easily pass through, and when the ratio L / T of the thickness T to the length L is 80 or less, the side wall 31a constituting the side is less likely to buckle.

[0023] The orthodontic aligner 20 is additively manufactured by a 3D modeling device irradiating a photocurable resin with ultraviolet laser light based on 3D data of the orthodontic aligner 20 created in advance using 3D software. The photocurable resin may contain, for example, a radical polymerizable compound such as a (meth)acrylic monomer, a polymerizable monomer including a cationic polymerizable compound such as an epoxy compound, and a photopolymerization initiator.

[0024] The orthodontic aligner 20 configured in this manner is worn so as to cover the crowns 11 of the upper jaw 16, as shown in Figure 2. The teeth 10 on which the orthodontic aligner 20 is worn are corrected to the orthodontic target position.

[0025] A plurality of orthodontic aligners 20 are prepared, and the teeth 10 are corrected stepwise to a final orthodontic target position.

[0026] The cross-sectional shape of the unit area 31 is not limited to a regular hexagon, an equilateral triangle, or a regular square, but may be a regular polygon that can fill a plane with a single type of polygon. Also, the cross-sectional shape of the unit area 31 may be a regular polygon that fills a plane along the shape of the upper jaw 16.

[0027] [Function of dental oral appliances] Hereinafter, a description will be given of the operation of the dental intraoral device (orthodontic aligner 20) of Example 1. The dental intraoral device (orthodontic aligner 20) of Example 1 is a dental intraoral device (orthodontic aligner 20) to be worn in the oral cavity (upper jaw 16), and is provided with a resin base 30 that conforms to the shape of the oral cavity (upper jaw 16), at least a portion of which is formed in a mesh shape (FIG. 1).

[0028] The provision of the base portion 30 distributes the force acting on the dental intraoral device (orthodontic aligner 20) and prevents stress concentration. Furthermore, by forming the base portion 30 in a mesh shape, the thickness of the base portion 30 can be reduced while maintaining a predetermined strength. Therefore, while maintaining a predetermined strength of the dental intraoral device (orthodontic aligner 20), the space inside the oral cavity can be made larger when the dental intraoral device (orthodontic aligner 20) is worn. As a result, it becomes easier to pronounce words and sense the temperature of food, improving the wearer's quality of life (QOL).

[0029] Furthermore, the weight of the dental intraoral device (orthodontic aligner 20) can be reduced, thereby reducing the patient's foreign body sensation and preventing the dental intraoral device (orthodontic aligner 20) from falling off due to its own weight. Furthermore, the improved passage of saliva suppresses dryness in the oral cavity, which is effective in preventing ulcers and caries associated with dryness and promoting wound healing. Furthermore, in patients with a weakened resistance to mechanical stimulation of the mucosa due to diabetes or the like, dental intraoral devices with dental implants can damage the underlying tissue, resulting in ulcers and pain. However, the dental intraoral device (orthodontic aligner 20) of the present invention can reduce the contact area with the patient, and is therefore expected to alleviate such symptoms.

[0030] In the dental intraoral device (orthodontic aligner 20) of Example 1, at least a part of the base portion 30 is formed by unit areas 31 having holes 31b arranged in a generally regular pattern (see the bottom of the page in FIG. 1).

[0031] This allows the force acting on the base portion 30 to be isotropically dispersed, preventing stress concentration. This increases the amount of elastic deformation of the base portion 30, preventing plastic deformation and fracture. As a result, the dental intraoral device (orthodontic aligner 20) can be easily attached to and removed from the oral cavity.

[0032] In the dental intraoral device (orthodontic aligner 20) of Example 1, the cross-sectional shape of the unit area 31 is formed as a regular polygon that can fill a plane with a single type of polygon (FIGS. 3 to 5).

[0033] This allows the floor section 30 to be laid without gaps in uniformly shaped unit areas 31. Therefore, while ensuring a predetermined strength, the floor section 30 can be made thin, resulting in a flexible, durable, and lightweight floor.

[0034] In the dental intraoral device (orthodontic aligner 20) of Example 1, the unit area 31 has a side length of 0.1 mm or more (FIGS. 3 to 5).

[0035] This allows the resin to easily flow out of the holes 31b that form the unit areas 31 when the dental intraoral device (orthodontic aligner 20) is manufactured using a three-dimensional modeling device, thereby preventing resin accumulation and the like. [Example]

[0036] The dental intraoral device of Example 2 differs from the dental intraoral device of Example 1 in that the configuration of the base portion is different.

[0037] [Dental oral appliance configuration] 6 is a perspective view showing a unit area of ​​the base portion of Example 2. The configuration of the dental intraoral device of Example 2 will be described below. Note that the same terms or the same symbols will be used to describe parts that are the same as or equivalent to those described in the above examples.

[0038] As shown in FIG. 6, the floor portion 130 of the second embodiment is formed in a mesh shape with unit areas 131 having holes 131b arranged in a generally regular pattern.

[0039] The unit area 131 is formed of a regular hexahedron, which is a polyhedron that can fill a space with one type of polyhedron. That is, the unit area 131 is formed of a regular hexahedron, which is a space-filling polyhedron, in a space of a predetermined thickness H that conforms to the shape of the upper jaw 16. The unit area 131 is formed in a frame shape by a frame 131c that connects the edges of the hexahedron, and holes 131b are formed on each face. These holes 131b allow saliva, heat, etc. to be transmitted to the upper jaw 16.

[0040] The unit regions 131 are filled into a space of a predetermined thickness H that conforms to the shape of the upper jaw 16, thereby forming a floor portion 130.

[0041] The length L of the side of the unit area 131 can be, for example, 0.1 mm or more and 5.0 mm or less. The width W of the frame 131c can be set to a predetermined value (for example, 0.02 mm). The ratio L / W of the width W to the length L is preferably 2.0 to 80, more preferably 2.5 to 70, and even more preferably 3.0 to 60. When the ratio L / W of the width W to the length L is 2.0 or more, saliva can easily pass through, and when the ratio L / W of the width W to the length L is 2.0 or more, saliva can easily pass through. W When the value is 80 or less, the frame 131c constituting the side is less likely to buckle.

[0042] [Function of dental oral appliances] Hereinafter, a description will be given of the operation of the dental intra-oral device of Example 2. In the dental intra-oral device of Example 2 (orthodontic aligner 20), the unit area 131 is formed of a single type of polyhedron that can fill the space (FIG. 6).

[0043] This allows the base portion 130 to be laid out without gaps in the unit areas 131 of uniform shape. Therefore, the base portion 130 can be made thinner and lighter while maintaining a predetermined strength. As a result, wearing the orthodontic aligner 20 of Example 2 makes it easier to pronounce words and to sense the temperature of food, improving the wearer's quality of life.

[0044] The other configurations and effects are substantially the same as those of the above embodiment, and therefore the explanation will be omitted. [Example]

[0045] The dental intraoral device of Example 3 differs from the dental intraoral device of Example 1 in that the configuration of the base portion is different.

[0046] [Dental oral appliance configuration] 7 is an exploded perspective view showing an orthodontic aligner and an upper jaw according to Example 3. The configuration of the dental intraoral device according to Example 3 will be described below. Note that the same terms or the same reference numerals will be used to describe parts that are the same as or equivalent to those described in the above examples.

[0047] As shown in Fig. 7, the front portion 230 of the base portion 30 is formed of unit areas 231 having higher rigidity than the unit areas 31 of other portions of the base portion 30. The front portion 230 is the front portion of the base portion 30, and is the portion of the base portion 30 around the front teeth 12 of the orthodontic aligner 20 attached to the upper jaw 16. In other words, the front portion 230 is the portion of the base portion 30 around the crown portions 21 that cover the front teeth 12. Note that Fig. 7 shows an enlarged view of some of the unit areas 31, 231.

[0048] For example, the unit area 231 of the front portion 230 can be formed to have a smaller shape than the unit areas 31 of the other portions, thereby providing higher rigidity than the unit areas 31. More specifically, for example, the length of a side of the unit area 231 of the front portion 230 can be set to 0.1 [mm], and the length of a side of the unit areas 31 of the other portions can be set to 0.5 [mm].

[0049] Furthermore, even if the thickness of the side wall of the unit area 231 in the front portion 230 is made thicker than the thickness T of the side wall 31a of the unit area 31 in other portions, the rigidity of the unit area 231 can be made higher than the rigidity of the unit area 31.

[0050] [Function of dental oral appliances] Hereinafter, a description will be given of the operation of the dental intraoral device of Example 3. In the dental intraoral device of Example 3 (orthodontic aligner 20), the front portion 230 of the base portion 30 is formed of unit areas 231 having higher rigidity than the other portions of the base portion 30 (FIG. 7).

[0051] This allows, for example, the unit area 231 of the front portion 230 of the base portion 30 to be made more rigid than the unit areas 31 of other portions of the base portion 30, thereby increasing the strength of the front portion 230, which is subjected to large stress when attaching and detaching the dental intraoral device (orthodontic aligner 20).

[0052] For example, by making the unit areas 231 of the front portion 230 of the base portion 30 denser than the unit areas 31 of other portions of the base portion 30, it is possible to increase the strength of the front portion 230, which is subjected to large stress when the dental intraoral device (orthodontic aligner 20) is attached or detached. As a result, by wearing the orthodontic aligner 20 of Example 3, pronunciation becomes easier, the temperature of food becomes easier to sense, and the wearer's QOL can be improved.

[0053] The other configurations and effects are substantially the same as those of the above embodiment, and therefore the explanation will be omitted.

[0054] The dental intraoral device of the present invention has been described above based on Examples 1 to 3. However, the specific configuration is not limited to these Examples, and design changes, additions, combinations of Examples, etc. are permitted as long as they do not deviate from the gist of the invention according to each claim in the scope of claims.

[0055] In Examples 1 to 3, a stereolithography device using a photocurable resin that is cured by ultraviolet laser light was shown as an example of the 3D modeling device. However, the 3D modeling device may be a projection type that uses light from a projector to cure and stack the photocurable resin, an inkjet type that sprays liquid photocurable resin and cures it by irradiating it with ultraviolet light, a fused deposition model that builds up thermoplastic resin layer by layer, or a powder sintering type that sinters powdered material by applying a high-power laser beam.

[0056] In Examples 1 and 3, the floor portion 30 is formed of one unit area layer. However, as shown in Fig. 8, the floor portion 30 may be formed of two unit areas layers, or three or more unit areas layers.

[0057] In the first embodiment, the cross-sectional shape of the unit area 31 is an example of a regular polygon that can fill a plane with one type of polygon. However, the cross-sectional shape of the unit area may be an example of a polygon that can fill a plane with one type of polygon.

[0058] For example, a polygon that can be tessellated with one type can be a parallelogram as shown in FIG. 9A. A polygon that can be tessellated with one type can also be a parallelogram, as shown in FIG. 9B, formed by combining two congruent triangles. A polygon that can be tessellated with one type can also be a parallel hexagon as shown in FIG. 10A. A polygon that can be tessellated with one type can also be a parallel hexagon, as shown in FIG. 10B, formed by combining two congruent quadrilaterals. A polygon that can be tessellated with one type can also be a parallel hexagon, as shown in FIG. 11A, formed by combining two congruent pentagons. A polygon that can be tessellated with one type can also be a pentagon that can be tessellated with one type, as shown in FIG. 11B.

[0059] In addition, polygons that can be tessellated with two or more types can be regular polygons, which are shapes of Archimedes' tessellation. For example, a polygon that can be tessellated with two or more types can be a shape consisting of eight equilateral triangles and one regular hexagon, as shown in Figure 12.

[0060] The polygons that can be filled on a plane can be preferably a combination of one or more of triangles, quadrilaterals, pentagons, regular polygons, and parallelepipeds. The polygons that can be filled on a plane can more preferably be a combination of one or more of regular polygons, parallelograms, and parallelepipeds. The polygons that can be filled on a plane can even more preferably be a combination of one or more of equilateral triangles, regular quadrilaterals, and regular hexagons. By improving the symmetry of the unit area, the applied load is less likely to concentrate, making plastic deformation and destruction less likely to occur. In particular, in equilateral triangles, regular quadrilaterals, and regular hexagons, the applied load is dispersed isotropically, significantly suppressing plastic deformation and destruction.

[0061] That is, the cross-sectional shape of the unit area can be formed by a regular polygon that can be filled on a plane, or can be formed by a polygon that can be filled on a plane, or can be formed by a figure that can be filled on a plane.

[0062] In the second embodiment, an example was shown in which the unit area 131 is a regular hexahedron (Archimedes' regular prism) that can fill a space with one type of shape. However, the unit area may be a uniform polyhedron that can fill a space with one type of shape.

[0063] Examples of uniform polyhedrons that can fill a space with one type include Archimedean regular triangular prisms, Archimedean regular hexagonal prisms, truncated octahedrons, and rhombic dodecahedrons.

[0064] The unit area may be a single space-filling polyhedron, such as a heteromorphic bitriangular prism (Johnson solid no. 26).

[0065] The unit area may be a uniform polyhedron that can be space-filled in two or more types, such as a regular tetrahedron and a regular octahedron, a regular tetrahedron and a truncated tetrahedron, a regular octahedron and a truncated hexahedron, a regular octahedron and a cuboctahedron, or a rhombic truncated cuboctahedron and a regular octagonal prism.

[0066] Furthermore, examples of uniform polyhedra that can be space-filling with two or more types include a polyhedron consisting of a truncated tetrahedron, a truncated octahedron, and a cuboctahedron, a polyhedron consisting of a truncated tetrahedron, a truncated hexahedron, and a rhombic truncated cuboctahedron, a polyhedron consisting of a regular tetrahedron, a cube, and a rhombic cuboctahedron, a polyhedron consisting of a cube, a cuboctahedron, and a rhombic cuboctahedron, and a polyhedron consisting of a cube, a truncated octahedron, and a rhombic truncated cuboctahedron.

[0067] Furthermore, examples of uniform polyhedra that can be used to fill space with two or more types include a combination of a cube, a truncated hexahedron, a rhombic truncated cuboctahedron, and a regular octagonal prism, or a combination of various equilateral rhombic polyhedra.

[0068] The unit area may be a polyhedron that can be space-filled with two or more types. Examples of polyhedrons that can be space-filled with two or more types include a combination of Johnson Solid No. 1 (square pyramid) and Johnson Solid No. 3 (regular triangular prism), a combination of Johnson Solid No. 1 (square pyramid) and Johnson Solid No. 7 (regular triangular prism), a combination of Johnson Solid No. 1 and Johnson Solid No. 27 (isomorphic bitriangular prism), a combination of a regular tetrahedron and Johnson Solid No. 1, a combination of a regular tetrahedron and Johnson Solid No. 4 (square prism), or a combination of a regular tetrahedron and Johnson Solid No. 8. It can be a regular tetrahedron and Johnson solid No. 28 (isomorphic bitetragonal prism), a regular octahedron and Johnson solid No. 3, a regular octahedron and Johnson solid No. 7 (triangular prism), a regular octahedron and Johnson solid No. 12 (triangular bipyramid), a truncated tetrahedron and Johnson solid No. 12, a truncated hexahedron and Johnson solid No. 1, or a cuboctahedron and Johnson solid No. 1.

[0069] In addition, examples of polyhedra that can be space-filling with two or more types include a regular tetrahedron, Johnson solid No. 1, and Johnson solid No. 18 (a regular triangular prism), a regular tetrahedron, Johnson solid No. 1, and Johnson solid No. 35 (a homomorphic bitriangular prism), a regular tetrahedron, Johnson solid No. 1, and Johnson solid No. 36 (a heteromorphic bitriangular prism), a regular tetrahedron, Johnson solid No. 1, and Johnson solid No. 15 (a bitetragonal prism), a regular tetrahedron, a regular cubic prism, and Johnson solid No. 28, and a regular tetrahedron, a regular octahedron, and Johnson solid No. 15. It can be composed of a regular cube, a dodecahedron, and Johnson Solid No. 91 (double crescent, double round tower), a regular cube, a cuboctahedron, and Johnson Solid No. 4, a regular cube, a cuboctahedron, and Johnson Solid No. 19 (square truncated tower), a regular cube, a cuboctahedron, and Johnson Solid No. 28, a regular cube, a tetrahedron, and Johnson Solid No. 19, an octahedron, Johnson Solid No. 1, and Johnson Solid No. 3, or a regular octahedron, Johnson Solid No. 1, and Johnson Solid No. 7.

[0070] In addition, examples of polyhedra that can be space-filling with two or more types include a regular tetrahedron, a regular cube, a cuboctahedron, and one or a combination of [Johnson Solid No. 28, Johnson Solid No. 29 (heteromorphic twin square tower)], a regular tetrahedron, Johnson Solid No. 1, and one or a combination of [regular cube, Johnson Solid No. 8, Johnson Solid No. 15] and one or a combination of [Johnson Solid No. 28, Johnson Solid No. 29], a regular tetrahedron, a regular cube, a cuboctahedron, and Johnson Solid No. 37 (heteromorphic twin square tower), a regular tetrahedron, a regular cube, Johnson Solid No. 1, and Johnson Solid No. 8, a regular tetrahedron, a regular octahedron, Johnson Solid No. 1, and Johnson Solid No. 15, and a regular tetrahedron, Johnson Solid No. 8, and Johnson Solid No. 15. or any combination of: a tetrahedron, Johnson Solid 1, Johnson Solid 28, and [cube, Johnson Solid 8, Johnson Solid 15]; a tetrahedron, Johnson Solid 1, Johnson Solid 37, and [cube, Johnson Solid 8, Johnson Solid 15]; a tetrahedron, cube, Johnson Solid 1, Johnson Solid 19, and [Johnson Solid 8, Johnson Solid 15]; or a tetrahedron, cube, Johnson Solid 1, Johnson Solid 19, and [Johnson Solid 8, Johnson Solid 15]; or a tetrahedron, Johnson Solid 1, Johnson Solid 4, and [cube, Johnson Solid 8, Johnson Solid 15].

[0071] The space-filling polyhedrons can be preferably a combination of one or more of the following: regular polyhedrons, semi-regular polyhedrons, regular prisms, antirectangular prisms, and Johnson solids. The space-filling polyhedrons can more preferably be a combination of one or more of the following: regular polyhedrons, cuboctahedrons, regular polygonal prisms, isohedral rhombic polyhedrons such as rhombic dodecahedrons, parallelepipeds such as parallelepipeds, truncated octahedrons, and rhombic dodecahedrons, rhombic cuboctahedrons, and rhombic truncated cuboctahedrons. The space-filling polyhedrons can even more preferably be a combination of one or more of the following: regular tetrahedrons, regular hexahedrons (cubes), regular octahedrons, regular triangular prisms, regular square prisms (rectangular parallelepipeds), regular hexagonal prisms, truncated octahedrons, rhombic dodecahedrons, and rhombic dodecahedrons.

[0072] Improving the symmetry of the unit area makes it less likely that a given load will concentrate, making it less likely that plastic deformation or destruction will occur. In particular, in the case of a regular tetrahedron, regular hexahedron (cube), regular octahedron, regular triangular prism, regular square prism (rectangular parallelepiped), regular hexagonal prism, truncated octahedron, rhombic dodecahedron, and oblong rhombic dodecahedron, the given load is distributed isotropically, significantly suppressing plastic deformation and destruction.

[0073] That is, the unit area can be formed of a uniform polyhedron that can fill space, can be formed of a polyhedron that can fill space, or can be formed of a solid that can fill space.

[0074] In Examples 1 to 3, an example was shown in which the entire floor portion 30 was formed in a mesh-like pattern with unit areas having holes 31b arranged in a substantially regular pattern. However, a portion of the floor portion may be formed in a mesh-like pattern with unit areas having holes arranged in a substantially regular pattern. The shape of the holes is not particularly limited, but a highly symmetrical shape is preferred. Specifically, the shape of the holes may be a shape whose cross section is a circle, equilateral triangle, regular square, regular pentagon, regular hexagon, or other regular polygon. More preferred are hole shapes whose cross section is a circle, equilateral triangle, regular square, or regular hexagon. More preferred are hole shapes whose cross section is a circle, in order to avoid forming notches that could serve as starting points for fracture.

[0075] In Examples 1 to 3, examples were shown in which the sides constituting the unit area were straight. However, the sides constituting the unit area may be curved as long as the effects of the present invention are not impaired. For example, the radius of curvature R is preferably 0.3 times or more, more preferably 0.5 times or more, and even more preferably 1.0 times or more, relative to the length L of the side of the unit area. There is no particular upper limit to the radius of curvature R, but it can be, for example, 100 times or less the length L of the side of the unit area.

[0076] In Examples 1 to 3, examples in which the side wall is solid are shown, but a hole may be formed in part of the side wall. The shape of the hole is not particularly limited, but a highly symmetrical shape is preferable. Specific examples of the hole shape include a circle, an equilateral triangle, a regular square, a regular pentagon, a regular hexagon, and other regular polygons. Of these, a circle, an equilateral triangle, a regular square, or a regular hexagon is more preferable. A circular hole shape is even more preferable because it does not form a notch that can serve as a fracture starting point.

[0077] In Examples 1 to 3, examples were shown in which no reinforcing structure was included between the side walls, but as shown in Fig. 13, a reinforcing structure such as a diagonal brace 35 may be included between the side walls 31a.

[0078] In Examples 1 to 3, examples were shown in which the base portion 30 covered all of the gums, hard palate, and soft palate. However, the base portion may be structured to cover the gums and hard palate, or may be structured to cover only the gums, or may be structured to cover any part of the gums, hard palate, and soft palate.

[0079] In Examples 1 to 3, the dental intraoral device of the present invention is shown as being applied to an orthodontic aligner 20 that is fitted into the oral cavity so as to cover the teeth 10 of the upper jaw 16. However, the dental intraoral device of the present invention can also be applied to an orthodontic aligner that is fitted into the oral cavity so as to cover the teeth of the lower jaw.

[0080] Examples in which the dental intraoral device of the present invention is applied to an orthodontic aligner are shown in Examples 1 to 3. However, the dental intraoral device of the present invention is not limited to orthodontic aligners, and can be applied to devices that are worn to cover the teeth, such as orthodontic retainers, dental intraoral devices for preventing teeth grinding, OA for treating sleep apnea syndrome, dental intraoral devices for whitening, sports mouth guards, and denture devices (complete dentures, partial dentures).

[0081] In the case of a denture base used in a denture device or an OA for treating sleep apnea syndrome, the thickness of the base can be, for example, 2.0 mm or less and 0.05 mm or more, preferably 1.0 mm or less, more preferably 0.8 mm or less, and even more preferably 0.7 mm or less.

[0082] In the case of denture bases, particularly partial denture bases, it is preferable to configure the clasp and midline areas, which are prone to fracture, with denser unit areas. By introducing a mesh structure configured with denser unit areas into such areas, it is possible to make them more flexible and less prone to fracture. The clasp areas may be shaped like hooks or cylinders. Cross-reference to related applications

[0083] This application claims priority based on Japanese Patent Application No. 2019-208221, filed with the Japan Patent Office on November 18, 2019, the entire disclosure of which is incorporated herein by reference in its entirety.

Claims

1. A mouthpiece-type dental intraoral device that is attached to the upper jaw in the oral cavity, a crown portion covering the crown of the tooth; a resin base portion covering at least a portion of the hard palate or soft palate of the maxilla; At least a part of the area of ​​the floor covering the hard palate or the soft palate is formed in a honeycomb shape by arranging unit areas each having a cylindrical shape formed by a side wall and a hole penetrating in the vertical direction. A mouthpiece-type dental intraoral device characterized by:

2. The cross-sectional shape of the unit area is formed by a figure that can be filled in a plane. The mouthpiece-type dental intraoral device according to claim 1 .

3. The cross-sectional shape of the unit area is formed as a polygon that can fill a plane. The mouthpiece-type dental intraoral device according to claim 1 or 2, characterized in that

4. The cross-sectional shape of the unit area is formed as a regular polygon that can fill a plane. The mouthpiece-type dental intraoral device according to any one of claims 1 to 3, characterized in that

5. The cross-sectional shape of the unit area is any one of a regular hexagon, an equilateral triangle, and a regular quadrilateral, The ratio L / T of the thickness T of the side wall to the length L of one side of the cross-sectional shape of the unit area is When the unit area is a regular hexagon, L / T is 1.25 or more and 50 or less, When the unit area is an equilateral triangle, L / T is 2.5 or more and 100 or less, When the unit area is a regular rectangle, L / T is 2.0 or more and 80 or less. The mouthpiece-type dental intraoral device according to claim 4.

6. The cross-sectional shape of the unit area is formed by a single polygon that can fill a plane. The mouthpiece-type dental intraoral device according to any one of claims 1 to 5.

7. The cross-sectional shape of the unit area is formed by a regular polygon that can fill a plane with one type of polygon. The mouthpiece-type dental intraoral device according to any one of claims 1 to 6.

8. The cross-sectional shape of the unit area is formed by a figure, polygon, or regular polygon that can be filled with two or more types of polygons. The mouthpiece-type dental intraoral device according to claim 1 or 2, characterized in that

9. The front portion of the floor is formed of the unit area having higher rigidity against stress applied during attachment and detachment than the other portions of the floor. The mouthpiece-type dental intraoral device according to any one of claims 1 to 8.

10. The unit area has a cross-sectional shape with a side length of 0.1 mm or more. The mouthpiece-type dental intraoral device according to any one of claims 1 to 9.

11. The base portion covers all of the gums of the upper jaw, the hard palate, and the soft palate. The mouthpiece-type dental intraoral device according to any one of claims 1 to 10.

12. A method for manufacturing the mouthpiece-type dental intraoral device according to any one of claims 1 to 11, generating three-dimensional data of the mouthpiece-type dental intraoral device; and forming the mouthpiece-type intraoral dental device using a three-dimensional modeling device based on the three-dimensional data, By carrying out the above steps, a mouthpiece-type dental intraoral device is obtained, which includes a crown portion that covers the dental crown and a resin base portion that covers at least a part of the hard palate or soft palate of the maxilla, and in which at least a part of the region that covers the hard palate or the soft palate of the base portion is formed in a honeycomb shape by arranging unit regions that are cylindrically formed by side walls and have holes that penetrate in the vertical direction. A method for manufacturing a mouthpiece-type dental intraoral device, comprising:

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