oral model

Abstract

To provide an oral cavity model capable of reproducing the state of upper and lower teeth and occlusion of a patient. [Solution] The oral cavity model 10 is three-dimensionally shaped for each patient and has an upper jaw section 20 with a plurality of upper teeth sections 21 that mimic all of the patient's upper teeth and an upper gum section 22 that mimics the upper gums, a lower jaw section 30 with a plurality of lower teeth sections 31 that mimic all of the patient's lower teeth and a lower gum section 32 that mimics the lower gums, and a connecting member 40 that connects the upper jaw section and the lower jaw section in an openable and closable manner.

Description

[Technical Field]

[0001] The present invention relates to a dental model. [Background technology]

[0002] Until now, when explaining treatment plans to patients in dental practice, oral models that show the condition and alignment of each tooth have generally been used.

[0003] Furthermore, as disclosed in Patent Documents 1 and 2, when dental treatment is performed, a model of the oral cavity and a model of the dentition are produced. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2022-152953 [Patent Document 2] Japanese Patent Application Publication No. 2019-005285 Summary of the Invention [Problem to be solved by the invention]

[0005] However, it is difficult to reproduce the actual condition of the upper and lower teeth and the bite alignment with the models described in these documents, and there is room for improvement when it comes to explaining treatment plans to patients.

[0006] The present invention has been made in view of the above problems, and has an object to provide an oral cavity model that can reproduce the state of the upper and lower teeth and the bite of a patient. [Means for solving the problem]

[0007] (1) The oral cavity model of the present invention is a three-dimensionally shaped oral cavity model for each patient, and includes an upper jaw portion having a plurality of upper teeth portions that imitate all of the patient's upper teeth and an upper gum portion that imitates the upper gums, a lower jaw portion having a plurality of lower teeth portions that imitate all of the patient's lower teeth and a lower gum portion that imitates the lower gums, and a connecting member that connects the upper jaw portion and the lower jaw portion in an openable and closable manner.

[0008] This oral cavity model can reproduce the movement and bite of the patient's upper and lower teeth.

[0009] (2) In the oral cavity model, the upper jaw portion, the lower jaw portion, and the connecting member may be three-dimensionally molded from the same material.

[0010] This oral cavity model can be easily shaped into a three-dimensional form compared to when different materials are used.

[0011] (3) In the above-described oral cavity model, the upper gum portion and the lower gum portion may have a hollow structure.

[0012] This oral model allows for a reduction in the amount of material used and shortens the time required for three-dimensional modeling using a 3D printer. [Effects of the Invention]

[0013] According to the present invention, it is possible to provide an oral cavity model that can reproduce the state of the upper and lower teeth and the bite of a patient. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a photograph showing the appearance of a closed state of a dental model according to an embodiment of the present invention. [Figure 2] 2 is a photograph showing the appearance of a dental implant according to an embodiment of the present invention in a state where it is opened at an angle of 30°. [Figure 3] 3 is a photograph showing the appearance of the oral cavity model according to the embodiment of the present invention in a state where it is opened 180 degrees. DETAILED DESCRIPTION OF THE INVENTION

[0015] A dental cast according to an embodiment of the present invention will be described below with reference to the drawings.

[0016] FIG. 1 is a photograph of the appearance of the oral cavity model according to this embodiment in a closed state. FIG. 2 is a photograph of the appearance of the oral cavity model according to this embodiment in a 30° opened state. FIG. 3 is a photograph of the appearance of the oral cavity model according to this embodiment in a 180° opened state. In the following description, the terms "upper side," "upper surface," "lower side," and "upper" and "lower" in "lower surface" refer to the directions when the oral cavity model 10 in FIG. 1 is closed. Furthermore, the terms "rear side" and "rear in the depth direction" refer to the back side of the patient who is the subject of the oral cavity model, and are also based on the directions when the oral cavity model 10 in FIG. 1 is closed.

[0017] The oral cavity model 10 is three-dimensionally shaped for each patient and includes an upper jaw portion 20, a lower jaw portion 30, and a connecting member 40 that connects the upper jaw portion 20 and the lower jaw portion 30 in an openable and closable manner. It is formed integrally or in sections using a three-dimensional printer (for example, an FMD method or a photolithography method).

[0018] The upper jaw portion 20 includes a plurality of upper teeth portions 21 that mimic all of the patient's upper teeth, and an upper gum portion 22 that mimics the upper gums. The arrangement of the upper teeth portions 21 in the upper gum portion 22 is the same as the arrangement of all of the teeth in the patient's actual gums. A hollow portion (upper hollow portion 52) is formed inside the upper gum portion 22 to reduce weight and shorten the molding time. This hollow portion is formed with a certain thickness remaining on the outer periphery, and the upper surface is open, making post-molding and cleaning easy.

[0019] The lower jaw portion 30 includes a plurality of lower teeth portions 31 that simulate all of the patient's lower teeth, and a lower gum portion 32 that simulates the lower gums. The arrangement of the lower teeth portions 31 in the lower gum portion 32 is the same as the arrangement of all of the teeth in the patient's actual gums. The lower gum portion 32 has a hollow structure similar to the upper jaw portion 20, which reduces the amount of material used and achieves a lightweight design.

[0020] The upper jaw 20 and the lower jaw 30 are preferably made of the same resin material, such as polyamide, acrylic, or PLA resin. This ensures that their deformation rates and thermal expansion coefficients match, preventing misalignment during opening and closing. Depending on the application, materials may be combined, such as making only the upper jaw elastic resin and the lower jaw hard resin.

[0021] The connecting member 40 connects the upper jaw 20 and the lower jaw 30 so that they can open and close, and includes an upper connecting member 42 and a lower connecting member 43.

[0022] The upper connecting member 42 has an upper holding portion 42a that holds the upper gum portion 22 from above, an upper horizontal portion 42b that extends in the depth direction from the rear end of the upper holding portion 42a, an upper oblique portion 42c that extends diagonally downward from the rear end of the upper horizontal portion 42b, and a supported portion 42d provided at the rear end of the upper oblique portion 42c.

[0023] The lower connecting member 43 has a lower holding portion 43a that holds the lower gum portion 32 from below, a lower horizontal portion 43b that extends in the depth direction from the rear end of the lower holding portion 43a, a lower oblique portion 43c that extends diagonally upward from the rear end of the lower horizontal portion 43b, and a support portion 43d that is provided at the rear end of the lower oblique portion 43c and rotatably supports the supported portion 42d of the upper connecting member 42.

[0024] The upper jaw 20 and the upper connecting member 42 are integrally formed. Hereinafter, the integrally formed upper jaw 20 and upper connecting member 42 will be referred to as the upper part U. A hollow structure is provided from the upper surface of the upper connecting member 42 to the upper gum portion 22 of the upper jaw 20, with an upper hollow portion 52. The upper hollow portion 52 is open at the upper surface of the upper connecting member 42. In other words, the upper jaw 20 and the upper connecting member 42 are provided with so-called lightening holes, so that the lightening holes can be seen.

[0025] The lower jaw 30 and the lower connecting member 43 are integrally formed. Hereinafter, the integrally formed lower jaw 30 and lower connecting member 43 will be referred to as the lower part L. A hollow structure is provided from the lower surface of the lower connecting member 43 to the lower gum portion 32 of the lower jaw 30, with a lower hollow portion (not shown). The lower hollow portion has a hollow structure similar to the upper hollow portion 52 shown in FIG. 1, and is open at the lower surface of the lower connecting member 43. In other words, the lower jaw 30 and the lower connecting member 43 are also hollowed out, so that the hollowed out portions can be seen.

[0026] The upper part U and the lower part L are produced using a so-called 3D printer based on three-dimensional data. Because the oral cavity model 10 is not for medical use, the upper part U and the lower part L can be produced using general industrial materials and do not need to be made of medical materials. Furthermore, the upper part U and the lower part L are three-dimensionally molded using the same material. However, they may also be molded using different materials.

[0027] The three-dimensional data used to fabricate the upper part U is composed of the three-dimensional data of the upper jaw 20 and the three-dimensional data of the upper connecting member 42. The three-dimensional data used to fabricate the lower part L is composed of the three-dimensional data of the lower jaw 30 and the three-dimensional data of the lower connecting member 43.

[0028] The three-dimensional data of the upper jaw 20 and the lower jaw 30 was obtained by three-dimensionally scanning the patient's oral cavity. The three-dimensional data of the upper connecting member 42 and the lower connecting member 43 was created by a computer with reference to the three-dimensional data of the upper jaw 20 and the lower jaw 30. Using the computer, the models of the upper jaw 20 and the lower jaw 30 were closed, and their positions were adjusted to represent the patient's actual bite state. A model of the upper holding member 42a was attached to the upper jaw 20, and a model of the lower holding member 43a was attached to the lower jaw 30. Furthermore, the models of the upper jaw 20 and the lower jaw 30 were opened, and models of the upper horizontal member 42b, the upper oblique member 42c, and the supported member 42d were attached to the upper holding member 42a, and models of the lower horizontal member 43b, the lower oblique member 43c, and the supporting member 43d were attached to the lower holding member 43a, so as to represent a state similar to when the patient actually opens their mouth.

[0029] Based on the model thus created on the computer, three-dimensional data used to manufacture the upper part U and the lower part L is created.

[0030] The upper part U and the lower part L are manufactured based on these three-dimensional data as described above. The manufactured supported part 42d of the upper part U is attached to the supporting part 43d of the lower part L to complete the assembly.

[0031] The completed oral cavity model 10 can be opened and closed, and reproduces the state of the oral cavity of an actual patient and the opening and closing movements. In addition, because it can be opened wider than an actual patient, it is easier to observe the state of the upper and lower teeth and gums than when observing the oral cavity of an actual patient. [Industrial Applicability]

[0032] The present invention can be used for oral cavity models. [Explanation of symbols]

[0033] 10 Oral model 20 Upper jaw 21 Upper teeth 22 Upper gums 30 Mandible 31 Lower tooth part 32 Lower gum area 40 Connecting member 52 Upper hollow part

Claims

1. A three-dimensionally modeled oral cavity model for each patient, an upper jaw portion including a plurality of upper teeth portions simulating all of the patient's upper teeth and an upper gum portion simulating the patient's upper gums; a lower jaw portion including a plurality of lower teeth portions simulating all of the patient's lower teeth and a lower gum portion simulating the patient's lower gums; a connecting member that connects the upper jaw portion and the lower jaw portion in an openable and closable manner.

2. The oral cavity model according to claim 1 , wherein the upper jaw portion, the lower jaw portion, and the connecting member are three-dimensionally molded from the same material.

3. The oral cavity model according to claim 2 , wherein the upper gum portion and the lower gum portion have a hollow structure.

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