Dental oral cavity device and manufacturing method thereof

Abstract

To provide a dental oral cavity device having strength and anti-fracture characteristic but allowing for a reduced thickness of a base thereof.SOLUTION: A dental oral cavity device (orthodontic aligner 20) to be attached in an oral cavity (upper jaw), the device including a resin floor part 30 along a shape of the oral cavity (upper jaw), and at least a part of the floor part is formed in mesh. The dental oral cavity device (orthodontic aligner) secures predetermined strength, but widens the oral cavity so as not to interfere conversation and dietary when the dental oral cavity device (orthodontic aligner) is attached.SELECTED DRAWING: Figure 1

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 intraoral 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 model. Oral devices, such as denture bases, are usually formed by mixing a polymer powder, such as PMMA, with a monomer liquid, such as MMA, and then thermally curing the mixture. 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 arranged 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] JP 2019-130286 A [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 has the problem that the thickness of the base is large 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 while allowing the thickness of the base to be thin. [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. Effect of the Invention

[0008] The dental intraoral appliance of the present invention thus constructed allows the thickness of the dental base to be reduced while still maintaining strength and fracture resistance. [Brief description of the drawings]

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

[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. EXAMPLES

[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] [Composition of orthodontic aligners] FIG. 1 is an exploded perspective view showing the orthodontic aligner and upper jaw of Example 1. FIG. 2 is a cross-sectional view showing the orthodontic aligner of Example 1 attached to the oral cavity. FIG. 3 is a perspective view showing a unit area of ​​the base part 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 the orthodontic target position.

[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 includes a crown portion 21 formed in a groove shape so as to cover the crown 11, and a base portion 30 connecting the palate side 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 Figs. 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 three-dimensional mesh structure that is regular or at least partially random. Note that Fig. 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. Figs. 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 one type of shape. The unit area 31 is formed in a cylindrical shape with a regular hexagonal side wall 31a in a plan view, and has a hole 31b that penetrates in the vertical direction. This hole 31b allows 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 passage, and is preferably 5.0 [mm] or less in terms of ensuring strength. The thickness T of the side wall 31a can be 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 one type of shape. The unit area 31 is formed in a cylindrical shape with equilateral triangular side walls 31a in a plan view, and has holes 31b that penetrate in the vertical direction. The 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 passage, and is preferably 5.0 [mm] or less in terms of ensuring strength. The thickness T of the side wall 31a can be 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 the unit area 31 in another example is a regular rectangle, which is a regular polygon that can fill a plane with a single type of shape. The unit area 31 is formed in a cylindrical shape with a side wall 31a that is a regular rectangle in a plan view, and has a hole 31b that penetrates in the vertical direction. This hole 31b allows 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 passage, and is preferably 5.0 [mm] or less in terms of ensuring strength. The thickness T of the side wall 31a can be 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 layer-formed 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 by 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 Fig. 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 are used to correct the teeth 10 stepwise to a final orthodontic target position.

[0026] The cross-sectional shape of the unit area 31 is not limited to a regular hexagon, a regular triangle, or a regular square, and may be a regular polygon that can fill a plane with one type of polygon. The cross-sectional shape of the unit area 31 may also 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 function 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) that is attached to the oral cavity (upper jaw 16) and includes a resin base portion 30 that conforms to the shape of the oral cavity (upper jaw 16), at least a part of which is formed in a mesh shape (FIG. 1).

[0028] By providing the base portion 30, the force acting on the dental intraoral device (orthodontic aligner 20) can be dispersed to prevent stress concentration. In addition, by forming the base portion 30 in a mesh shape, the thickness of the base portion 30 can be reduced while ensuring a predetermined strength. Therefore, while ensuring a predetermined strength of the dental intraoral device (orthodontic aligner 20), the space in the oral cavity can be made wider when the dental intraoral device (orthodontic aligner 20) is worn. As a result, it becomes easier to pronounce words and to feel the temperature of food, thereby improving the wearer's QOL (Quality of Life).

[0029] In addition, the dental intraoral device (orthodontic aligner 20) can be made lighter, which reduces the patient's foreign body sensation and prevents the dental intraoral device (orthodontic aligner 20) from falling off due to its own weight. In addition, the passage of saliva is improved, which prevents dryness in the oral cavity and is effective in preventing ulcers and caries associated with dryness and promoting wound healing. In addition, in patients with low resistance to mechanical stimulation of the mucosa due to diabetes or the like, dental intraoral devices with dental plates can cause damage to the tissues under the plate, 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, which is 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 substantially regularly arranging unit areas 31 having holes 31b (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 destruction. As a result, the dental intraoral device (orthodontic aligner 20) can be easily attached to and detached 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 one type of polygon (FIGS. 3 to 5).

[0033] This allows the floor section 30 to be laid without gaps in the uniformly shaped unit areas 31. Therefore, while ensuring a predetermined strength, the floor section 30 can be made thin, resulting in a flexible, durable, 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 making it possible to prevent resin accumulation and the like. EXAMPLES

[0036] The dental intra-oral appliance of Example 2 differs from the dental intra-oral appliance 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 part 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 the same or equivalent parts as 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 in which unit areas 131 having holes 131b are arranged in a substantially 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 material. 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 sides of the hexahedron, and holes 131b are formed on each face. These holes 131b allow saliva, heat, and the like to be transmitted to the upper jaw 16.

[0040] The unit regions 131 are filled in 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 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 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 certain strength. As a result, by wearing the orthodontic aligner 20 of Example 2, pronunciation becomes easier, and the temperature of food can be more easily sensed, improving the QOL of the wearer.

[0044] Other configurations and functions and effects are substantially the same as those of the above embodiment, so description thereof will be omitted. EXAMPLES

[0045] The dental intra-oral appliance of Example 3 differs from the dental intra-oral appliance of Example 1 in that the configuration of the base part is different.

[0046] [Dental oral appliance configuration] 7 is an exploded perspective view showing an orthodontic aligner and an upper jaw of Example 3. The configuration of the dental intraoral device of Example 3 will be described below. Note that the same terms or the same reference numerals will be used to describe the same or equivalent parts as 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 the 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 portion 21 covering 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 in 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 sidewall of the unit area 231 in the front portion 230 is made thicker than the thickness T of the sidewall 31a of the unit area 31 in the 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 function 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 a unit area 231 having higher rigidity than the other portions of the base portion 30 (FIG. 7).

[0051] As a result, for example, by making the unit area 231 of the front portion 230 of the base portion 30 more rigid 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 great stress when attaching and removing the dental intraoral device (orthodontic aligner 20).

[0052] For example, by making the unit area 231 of the front portion 230 of the base portion 30 denser than the unit areas 31 of the other portions of the base portion 30, it is possible to increase the strength of the front portion 230 to which a large stress is applied when the dental intraoral device (orthodontic aligner 20) is attached and 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 QOL of the wearer can be improved.

[0053] Other configurations and functions and effects are substantially the same as those of the above embodiment, so description thereof 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 the 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 the first to third embodiments, a stereolithography device using a photocurable resin that is cured by an ultraviolet laser beam is used as an example of a three-dimensional modeling device. However, the three-dimensional modeling device may be a projection type that uses the light of a projector to cure and stack the photocurable resin, an inkjet type that sprays liquid photocurable resin and cures and stacks 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 the first and third embodiments, the floor portion 30 is formed of a single unit area. However, the floor portion 30 may be formed of two unit areas, or three or more unit areas, as shown in FIG.

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

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

[0059] In addition, a polygon that can be tessellated with two or more types can be a regular polygon, which is a shape 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, quadrangles, pentagons, regular polygons, and parallel hexagons. The polygons that can be filled on a plane can more preferably be a combination of one or more of regular polygons, parallelograms, and parallel hexagons. The polygons that can be filled on a plane can even more preferably be a combination of one or more of equilateral triangles, regular quadrangles, and regular hexagons. By improving the symmetry of the unit area, the applied load is less likely to concentrate, and plastic deformation and destruction are less likely to occur. In particular, in equilateral triangles, regular quadrangles, and regular hexagons, the applied load is isotropically distributed, so that plastic deformation and destruction are significantly suppressed.

[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, 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 has been 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 prism, Archimedean regular hexagonal prism, truncated octahedron, and rhombic dodecahedron.

[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 with 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 rhomboid truncated cuboctahedron and a regular octagonal prism.

[0066] Furthermore, examples of uniform polyhedrons that can be space-filling in two or more types include a truncated tetrahedron, a truncated octahedron, and a cuboctahedron, a truncated tetrahedron, a truncated hexahedron, and a rhomboid cuboctahedron, a regular tetrahedron, a cube, and a rhomboid cuboctahedron, a cube, a cuboctahedron, and a rhomboid cuboctahedron, and a cube, a truncated octahedron, and a rhomboid cuboctahedron.

[0067] In addition, examples of uniform polyhedrons that can be used to fill a 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 isohedral rhombic polyhedrons.

[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 polyhedron consisting of Johnson Solid No. 1 (square pyramid) and Johnson Solid No. 3 (triangular tower), a polyhedron consisting of Johnson Solid No. 1 (square pyramid) and Johnson Solid No. 7 (triangular prism), a polyhedron consisting of Johnson Solid No. 1 and Johnson Solid No. 27 (isomorphic bitriangular tower), a polyhedron consisting of a regular tetrahedron and Johnson Solid No. 1, a polyhedron consisting of a regular tetrahedron and Johnson Solid No. 4 (square tower), a polyhedron consisting of a regular tetrahedron and Johnson Solid No. 8, and so on. It can be a regular tetrahedron and Johnson solid #28 (isomorphic bitetragonal prism), a regular octahedron and Johnson solid #3, a regular octahedron and Johnson solid #7 (triangular prism), a regular octahedron and Johnson solid #12 (triangular bipyramid), a truncated tetrahedron and Johnson solid #12, a truncated hexahedron and Johnson solid #1, or a cuboctahedron and Johnson solid #1.

[0069] In addition, examples of polyhedra that can be used to fill space with two or more types include a regular tetrahedron, Johnson solid #1, and Johnson solid #18 (a regular triangular truncated prism), a regular tetrahedron, Johnson solid #1, and Johnson solid #35 (a homomorphic bitriangular truncated prism), a regular tetrahedron, Johnson solid #1, and Johnson solid #36 (a heteromorphic bitriangular truncated prism), a regular tetrahedron, Johnson solid #1, and Johnson solid #15 (a bitetragonal prism), a regular tetrahedron, a regular cubic prism, and Johnson solid #28, and a regular tetrahedron, a regular octahedron, and Johnson solid #15. It can be a regular cube, a dodecahedron, and Johnson Solid No. 91 (Twin Crescent Twin Tower), a regular cube, a cuboctahedron, and Johnson Solid No. 4, a regular cube, a cuboctahedron, and Johnson Solid No. 19 (Square Tower Column), a regular cube, a cuboctahedron, and Johnson Solid No. 28, a regular cube, a tetrahedron, and Johnson Solid No. 19, a regular 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 used to fill space 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 (heterophase twin square tower)], a regular tetrahedron, Johnson Solid No. 1, and one or a combination of [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 (heterophase twin square tower column), 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, a regular tetrahedron, Johnson Solid No. 8, and Johnson Solid No. or a combination of a tetrahedron, Johnson solid #1, Johnson solid #28, and [cube, Johnson solid #8, Johnson solid #15]; or a combination of a tetrahedron, Johnson solid #1, Johnson solid #37, and [cube, Johnson solid #8, Johnson solid #15]; or a combination of a tetrahedron, cube, Johnson solid #1, Johnson solid #19, and [Johnson solid #8, Johnson solid #15]; or a combination of a tetrahedron, cube, Johnson solid #1, Johnson solid #19, and [Johnson solid #8, Johnson solid #15]; or a combination of a tetrahedron, Johnson solid #1, Johnson solid #4, and [cube, Johnson solid #8, Johnson solid #15].

[0071] The space-filling polyhedron may preferably be a combination of one or more of a regular polyhedron, a semi-regular polyhedron, a regular prism, an antirectangular prism, and a Johnson solid. The space-filling polyhedron may more preferably be a combination of one or more of a regular polyhedron, a cuboctahedron, a regular polygonal prism, an isohedral rhombic polyhedron such as a rhombic dodecahedron, a parallelepiped, a truncated octahedron, a long rhombic dodecahedron, a rhombic cuboctahedron, and a rhombic truncated cuboctahedron. The space-filling polyhedron may more preferably be a combination of one or more of a regular tetrahedron, a regular hexahedron (cube), a regular octahedron, a regular triangular prism, a regular square prism (rectangular parallelepiped), a regular hexagonal prism, a truncated octahedron, a rhombic dodecahedron, and a long rhombic dodecahedron.

[0072] By improving the symmetry of the unit area, the applied load is less likely to concentrate, and plastic deformation and destruction are less likely to occur. In particular, in the case of a regular tetrahedron, regular hexahedron (cube), regular octahedron, regular triangular prism, regular square prism (rectangular prism), regular hexagonal prism, truncated octahedron, rhombic dodecahedron, and long rhombic dodecahedron, the applied load is distributed isotropically, so plastic deformation and destruction are significantly suppressed.

[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 the first to third embodiments, the entire floor portion 30 is formed in a mesh shape with unit areas having holes 31b arranged in a substantially regular manner. However, a part of the floor portion may be formed in a mesh shape with unit areas having holes arranged in a substantially regular manner. The shape of the holes is not particularly limited, but is preferably a highly symmetrical shape. Specifically, the shape of the holes may be a shape whose cross section is a circle, an equilateral triangle, a regular square, a regular pentagon, a regular hexagon, or any other regular polygon. The shape of the holes is more preferably a shape whose cross section is a circle, an equilateral triangle, a regular square, or a regular hexagon. The shape of the holes is more preferably a shape whose cross section is a circle in order not to form a notch portion that is the starting point of fracture.

[0075] In the first to third embodiments, the sides constituting the unit area are straight lines. However, the sides constituting the unit area may be curved lines 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. The upper limit of the radius of curvature R is not particularly limited, but may be, for example, 100 times or less of the length L of the side of the unit area.

[0076] In Examples 1 to 3, the side wall is solid, but a hole may be formed in a part of the side wall. The shape of the hole is not particularly limited, but it is preferable that the shape is highly symmetrical. Specifically, the shape of the hole may be a circle, an equilateral triangle, a regular square, a regular pentagon, a regular hexagon, or other regular polygon. Among these, the shape of the hole is more preferably a circle, an equilateral triangle, a regular square, or a regular hexagon. If the shape of the hole is a circle, it is more preferable because it does not form a notch portion that is the starting point of fracture.

[0077] In the first to third embodiments, there is shown an example in which no reinforcing structure is included between the side walls. However, as shown in Fig. 13, a reinforcing structure such as a diagonal brace 35 may be included between the side walls 31a.

[0078] In the examples 1 to 3, the base portion 30 covers all of the gums, hard palate, and soft palate. However, the base portion may be structured to cover the gums and hard palate, 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 the first to third embodiments, the dental intraoral device of the present invention is applied to an orthodontic aligner 20 that is attached to 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 attached to the oral cavity so as to cover the teeth of the lower jaw.

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

[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. The thickness of this base can be 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 a denture base, particularly in the case of a partial denture base, it is preferable to configure the clasp portion and the midline portion, which are prone to fracture, with unit areas of a denser shape. By introducing a mesh structure configured with unit areas of a denser shape into such portions, it is possible to make them more flexible and less prone to fracture. The clasp portion may be shaped like a hook or a tube.

Claims

1. A dental intraoral device to be worn in the oral cavity, It has a resin base that conforms to the shape of the oral cavity. At least a portion of the floor is formed in a mesh shape. A dental intraoral device comprising:

2. At least a portion of the floor portion is formed by substantially regularly arranged unit areas having holes.

2. The dental intraoral device according to claim 1 .

3. The cross-sectional shape of the unit area is formed of a figure that can be filled in a plane.

3. The dental intraoral device according to claim 2.

4. The cross-sectional shape of the unit area is formed into a polygon that can fill a plane.

4. The dental intraoral device according to claim 2 or 3.

5. The cross-sectional shape of the unit area is formed into a regular polygon that can fill a plane. The dental intraoral device according to any one of claims 2 to 4.

6. The cross-sectional shape of the unit area is formed of a single type of polygon that can fill a plane. A dental intraoral device according to any one of claims 2 to 5.

7. The cross-sectional shape of the unit area is formed of a regular polygon that can fill a plane with a single type of polygon. The dental intraoral device according to any one of claims 2 to 6.

8. The unit area is formed of a solid that can fill space.

3. The dental intraoral device according to claim 2.

9. The unit area is formed of a space-filling polyhedron.

9. A dental intraoral device according to claim 2 or 8.

10. The unit area is formed of a uniform polyhedron that can fill space.

10. A dental intraoral device according to claim 2, 8 or 9.

11. The unit area is formed of a single type of polyhedron that can fill the space. A dental intraoral device according to any one of claims 2 and 8 to 10.

12. The unit area is formed of a uniform polyhedron that can fill the space with one type of material. A dental intraoral device according to any one of claims 2 and 8 to 11.

13. The front portion of the floor is formed of the unit area having higher rigidity than the other portions of the floor. A dental intraoral device according to any one of claims 2 to 12.

14. The unit area has a side length of 0.1 mm or more. A dental intraoral device according to any one of claims 2 to 13.

15. A method for manufacturing a dental intraoral device according to any one of claims 1 to 14, comprising the steps of: generating three-dimensional data of the dental intraoral appliance; and forming the dental intraoral device using a three-dimensional modeling device based on the three-dimensional data. A method for manufacturing a dental intraoral device, comprising:

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