Tooth model

Abstract

Provided is a teeth model which is easy for even a novice to explore, and with which it is possible to practice removal using a calculus removal tool.　This teeth model 10 comprises a model tooth body 10A and model calculus 13 which is provided to a side surface 10a of the model tooth body 10A. The model calculus 13 includes a large model calculus 13B having a maximum width W1 of 0.7 mm≤W1≤1.5 mm in a planar view seen from a side of the side surface 10a, and having a boundary width W2 of W2<W1 which is a width at the boundary with the side surface 10a of the model tooth body 10A in the same direction as the direction of the maximum width W1.

Description

Technical Field

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

Background Art

[0002] Conventionally, dental models have been used for training in dental treatment. In recent years, with the spread of dental models in society, dental models have also been used for training in removing dental calculus from teeth (see Patent Document 1). In the training for removing dental calculus, a user of a dental model uses a dental calculus removal instrument such as a scaler to search for and remove the model dental calculus.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Here, when the size of the model dental calculus is small, it is easy to remove it with a dental calculus removal instrument, but it is difficult to search for it unless the person is skilled. On the other hand, when the size of the model dental calculus is large, it is easy for beginners to search for it, but it is difficult to remove it with a dental calculus removal instrument.

[0005] An object of the present invention is to provide a dental model that is easy for beginners to search for and enables training in removing with a dental calculus removal instrument.

Means for Solving the Problems

[0006] In order to solve the above problems, the present invention provides the following. A tooth model includes a model tooth body and calculus on the side surface of the model tooth body. The calculus has a maximum width W1 in a plan view seen from the side of the side surface, where 0.7 mm ≤ W1 ≤ 1.5 mm, and a boundary width W2 in the same direction as the direction of the maximum width W1 at the boundary with the side surface of the model tooth body, where W2 < W1. The tooth model includes large calculus.

[0007] Preferably, the large calculus has a spherical segment shape.

[0008] Preferably, the boundary width W2 is 70% or more and 90% or less of the maximum width W1.

[0009] The calculus includes small calculus with a maximum width W1 where 0.3 mm ≤ W1 < 0.7 mm. For the small calculus, the boundary width W2 may satisfy W2 ≤ W1.

[0010] A plurality of the calculus may be provided on the side surface of the model tooth body, and the plurality of calculus may form an aggregate with a distance between each other of 0.5 mm or less.

[0011] A plurality of the aggregates may be provided, and the distance between the aggregates may be 1 mm or more.

[0012] When the calculus has an elongated shape, preferably, the maximum width W1 is the maximum width in the minor axis direction.

Advantages of the Invention

[0013] According to the present invention, it is possible to provide a tooth model that is easy for beginners to explore and enables removal training with a calculus removal instrument.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5A

Figure 5B

Figure 6A

Figure 6B

Figure 7

Mode for Carrying Out the Invention

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall perspective view of the jaw model 1 including the tooth model 10 according to the embodiment of the present invention. The jaw model 1 is used for dental training and includes a tooth model 10, a dental base 20, and a model gingiva 30.

[0016] (Tooth model 10) FIG. 2 is a view of the tooth model 10 seen from the outside of the mouth. In the embodiment, the tooth model 10 simulating a molar will be described, but it is not limited thereto, and it may be a model simulating other teeth. The tooth model 10 includes a model tooth body 10A and a model calculus 13 provided on the side surface of the model tooth body 10A.

[0017] (Model tooth body 10A) The model tooth body 10A has a shape imitating an actual tooth in this embodiment and has a crown portion 11 and a root portion 12. The root portion 12 is inserted into an insertion hole portion (not shown) formed along the tooth row with respect to the tooth base 20. With the root portion 12 inserted into the insertion hole portion, the model gum 30 is covered on the model tooth body 10A and the tooth base 20, and the tooth model 10 is supported by the tooth base 20.

[0018] In the embodiment, the model dental calculus 13 and the model tooth body 10A are integrally formed of an epoxy resin. However, it is not limited to this, and it may be manufactured of other materials as long as it can be used as a material for the tooth model 10.

[0019] When the model dental calculus 13 is integrally formed with the model tooth body 10A as in the embodiment, the production of the tooth model 10 with the model dental calculus becomes easy. Also, by repeatedly using one mold capable of integrally forming the model dental calculus 13 and the model tooth body 10A, a large number of tooth models 10 of the same shape with little variation in the adhesion form and adhesion force of the model dental calculus 13 can be manufactured. Since such a large number of tooth models 10 of the same shape can be manufactured, a plurality of users can use the same tooth model 10 for the same training. Therefore, the skills obtained through training can be made constant among users, and equality can be ensured even when others evaluate the training results of users.

[0020] (Model dental calculus 13) The model dental calculus 13 is provided in the embodiment at the periphery A of the boundary portion between the crown portion 11 and the root portion 12. Since the periphery of the boundary portion between the crown portion 11 and the root portion 12 is a place where dental calculus actually easily adheres, by providing the model dental calculus 13 at the periphery of this boundary portion, it is possible to approximate the adhesion state of the actual dental calculus. However, it is not limited to this, and it may be provided only on the crown portion 11 or only on the root portion 12.

[0021] FIG. 3 is an enlarged view of the periphery A of the boundary between the crown portion 11 and the root portion 12, which is surrounded by the dashed-dotted line in FIG. 2. FIG. 4 is a cross-sectional view taken along the line B-B in FIG. 3. FIG. 5A is a cross-sectional view taken along the line C-C in FIG. 3. FIG. 5B is a cross-sectional view taken along the line D-D in FIG. 3.

[0022] In the embodiment, the model calculus 13 has a spherical segment shape obtained by cutting a virtual sphere Q by a plane. The maximum width W1 in the plan view of the model calculus 13 as viewed from the side of the side surface of the model tooth body 10A shown in FIGS. 4, 5A, and 5B satisfies 0.3 mm ≦ W1 ≦ 1.5 mm. When further subdivided, the model calculus 13 includes a large model calculus 13B with 0.7 mm ≦ W1 ≦ 1.5 mm and a small model calculus 13S with 0.3 mm ≦ W1 < 0.7 mm.

[0023] FIG. 4 is a view showing the large model calculus 13B with 0.7 mm ≦ W1 ≦ 1.5 mm. For the large model calculus 13B, the boundary width W2, which is the width in the same direction as the direction of the maximum width W1 at the boundary with the side surface 10a of the model tooth body 10A, satisfies W2 < W1.

[0024] FIGS. 5A and 5B are views showing the small model calculus 13S with 0.3 mm ≦ W1 < 0.7 mm. The small model calculus 13S includes a small model calculus 13Sa shown in FIG. 5A, in which the boundary width W2, which is the width in the same direction as the direction of the maximum width W1 at the boundary with the side surface 10a of the model tooth body 10A, satisfies W2 < W1, and a small model calculus 13Sb shown in FIG. 5B, in which W2 = W1, that is, the boundary width W2 is the maximum width W1.

[0025] For the large model calculus 13B shown in FIG. 4 and the small model calculus 13Sa shown in FIG. 5A, the boundary width W2 satisfies W2 < W1. That is, for the large model calculus 13B and the small model calculus 13Sa, the width gradually expands from the boundary width W2 at the boundary portion with the side surface 10a of the model tooth body 10A until it becomes the boundary width W2 toward the protruding side. As described above, in the embodiment, the model calculus 13 has a spherical segment shape obtained by cutting the virtual sphere Q by the plane of the boundary with the side surface 10a of the model tooth body 10A. The maximum width W1 is the diameter of the virtual sphere Q. The boundary width W2 is the diameter of the circular cut surface on the side surface 10a of the model tooth body 10A in the virtual sphere Q.

[0026] The protruding height of the large-scale calculus 13B and the small-scale calculus 13Sa from the side surface 10a of the model tooth body 10A is about 75% of the diameter of the virtual sphere Q in the embodiment. Regarding the relationship between about 75% of the diameter of the virtual sphere Q and the maximum width W1 and the boundary width W2, W2 ≒ 0.86W1. However, it is not limited thereto, and the boundary width W2 is preferably 70% or more and 90% or less of the maximum width W1, and more preferably 80% or more and 90% or less of the maximum width W1.

[0027] (Small-scale calculus 13Sb) For the small-scale calculus 13Sb shown in FIG. 5B, the boundary width W2 is W2 = W1. That is, for the small-scale calculus 13Sb among the model calculi 13, the boundary width W2 of the boundary portion with the side surface 10a of the model tooth body 10A is the maximum width W1. The protruding height of the small-scale calculus 13Sb among the model calculi 13 from the side surface 10a of the model tooth body 10A is about 50% of the diameter of the virtual sphere Q in the embodiment. That is, the maximum width W1 and the boundary width W2 are the diameter of the virtual sphere Q.

[0028] (Model calculus group 40) As shown in FIG. 3, a plurality of model calculi 13 are provided on the side surface of the model tooth body 10A. The plurality of model calculi 13 form a model calculus group 40 which is an aggregate of a plurality of model calculi 13 with an interval d1 between them being 0.5 mm or less. When there are two or more model calculus groups 40, the interval d2 between the model calculus groups 40 is 1 mm or more.

[0029] As described above, the tooth model 10 of the embodiment is used for training to remove calculus. That is, in a state where the tooth model 10 is supported by the dental ridge 20, a calculus removal instrument such as a scaler can be operated in the same manner as actual calculus removal to remove the model calculus 13 of the tooth model 10.

[0030] In the model calculus 13 of the embodiment, the maximum width W1 in a plan view seen from the side of the side surface 10b of the model tooth body 10A satisfies 0.7 mm ≤ W1 ≤ 1.5 mm, and the boundary width W2, which is the width in the same direction as the direction of the maximum width W1 at the boundary with the side surface 10b of the model tooth body 10A, satisfies W2 < W1, and includes the large model calculus 13B.

[0031] Since such a large model calculus 13B is large in size, it is easy for beginners to search for.

[0032] Also, generally, many calculus removal instruments have an arcuate tip and remove the calculus attached to the side surface of the tooth by moving from the root side to the crown side along the side surface of the tooth. Here, even if the large model calculus 13B has a maximum width W1 in a plan view seen from the side of the side surface of the model tooth body satisfying 0.7 mm ≤ W1 ≤ 1.5 mm, unlike the embodiment, if the boundary width W2, which is the width in the same direction as the direction of the maximum width W1 at the boundary with the side surface of the model tooth body, is W2 = W1 instead of W2 < W1, the adhesion area of the large model calculus to the model tooth body is large, so the adhesive force is large, and it is difficult to remove the calculus with a calculus removal instrument.

[0033] However, in the embodiment, although it is the large model calculus 13B with 0.7 mm ≤ W1 ≤ 1.5 mm, the boundary width W2, which is the width in the same direction as the direction of the maximum width W1 at the boundary with the side surface 10b of the model tooth body 10A, satisfies W2 < W1. Therefore, the adhesion area of the large model calculus 13B to the model tooth body 10A becomes smaller than the case where W2 = W1. Thus, it becomes easier to remove the model calculus 13 from the side surface 10a of the model tooth body 10A.

[0034] Furthermore, when removing the model calculus 13, since the boundary width W2 is smaller than the maximum width W1, a concave portion is formed between the side surface 10a of the model tooth body 10A and the model calculus 13, and the arcuate tip of the calculus removal instrument gets caught in the concave portion. Therefore, it becomes even easier to remove the model calculus 13 from the side surface 10a of the model tooth body 10A.

[0035] Note that for the small-scale calculus 13S with 0.3 mm ≤ W1 < 0.7 mm, even if W2 = W1, it is easy to remove. Therefore, in the embodiment, the small-scale calculus 13S with 0.3 mm ≤ W1 < 0.7 mm includes not only the small-scale calculus 13Sa with W2 < W1 but also the small-scale calculus 13Sb with W2 = W1. However, in this case, since the size is small, it is difficult for beginners to search for the small-scale calculus 13S.

[0036] In the embodiment, the model calculus 13 forms a model calculus group 40 which is an aggregate of a plurality of model calculi 13 with an interval d1 between them being 0.5 mm or less. Such an aggregate of model calculi 13 with an interval d1 between them being 0.5 mm or less, the model calculus group 40, is recognized as one calculus with a size exceeding 1.5 mm. Suppose the minimum planar width W1 of one model calculus 13 exceeds 1.5 mm. Even if the boundary width W2 is smaller than the minimum planar width W1, it is difficult to remove. However, in the embodiment, what is recognized as one calculus with a size exceeding 1.5 mm is the model calculus group 40 which is an aggregate of a plurality of model calculi 13. And each model calculus 13 included in the model calculus group 40 is removable. Therefore, it can be used for training to remove large calculus.

[0037] Also, when the interval d2 between each model calculus group 40 is 1 mm or more, it can be recognized as different calculi.

[0038] (Variant form) As described above, in the above-mentioned embodiment, the model calculus 13 has a spherical segment shape obtained by cutting a sphere with one plane. However, the present invention is not limited to this. In the case of a large model calculus with 0.7 mm ≤ W1 ≤ 1.5 mm, as long as W2 < W1, and in the case of a small model calculus with 0.3 mm ≤ W1 < 0.7 mm, as long as W2 ≤ W1, other shapes may be used.

[0039] For example, FIGS. 6A and 6B are diagrams showing a deformed model calculus 113. In the deformed form shown in FIGS. 6A and 6B, the model calculus 113 has an elliptical sphere cut shape obtained by cutting an elliptical sphere with one plane. FIG. 6A shows a large model calculus 113B with 0.7 mm ≤ W1 ≤ 1.5 mm, or a small model calculus 113Sa with 0.3 mm ≤ W1 < 0.7 mm and W2 < W1, and FIG. 6B shows a small model calculus 113Sb with 0.3 mm ≤ W1 < 0.7 mm and W2 = W1.

[0040] Further, FIG. 7 is a diagram showing a plan view of a large model calculus 213 in a deformed form as viewed from the side of the side surface of the model tooth body 10A. The large model calculus 213 in FIG. 7 has an elongated shape in plan view. In such an elongated shape, the maximum width W1 in the plan view as viewed from the side of the side surface of the model tooth body 10A in the large model calculus 213 is the maximum width in the minor axis direction, and this maximum width W1 in the minor axis direction satisfies 0.7 mm ≤ W1 ≤ 1.5 mm. And the large model calculus 213 has a width in the same direction as the direction of the maximum width W1 at the boundary with the side surface of the model tooth body 10a, and the boundary width W2 satisfies W2 < W1. Similar to FIG. 4, a concave portion is also formed between the side surface 10a of the model tooth body 10A and the large model calculus 213 in the deformed large model calculus 213, and the arc-shaped tip of the calculus removing instrument is caught in the concave portion. Therefore, it becomes easy to remove the model calculus 213 from the side surface 10a on the minor axis side of the model tooth body 10A.

[0041] Furthermore, although the model tooth body 10 in the embodiment has a shape imitating an actual tooth, it is not limited thereto, and for example, it may be plate-shaped or cylindrical.

Explanation of Reference Numerals

[0042] A Periphery of the boundary portion Q Virtual sphere W1 Maximum width W2 Boundary width 1 Jaw model 10 Tooth model 10A Model tooth body 10a Side surface 11 Tooth crown portion 12 Tooth root 13 Model dental calculus 13B Large model dental calculus 13Sa, 13Sb Small model dental calculus

Claims

1. A model tooth body, and a model dental calculus provided on a side surface of the model tooth body, wherein the model dental calculus has a maximum width W1 in a plan view seen from a side of the side surface of 0.7 mm ≤ W1 ≤ 1.5 mm, and a boundary width W2 in the same direction as the direction of the maximum width W1 at a boundary with the side surface of the model tooth body satisfies W2 < W1, and includes a large model dental calculus, a tooth model.

2. The large model dental calculus has a spherical segment shape, The tooth model according to Claim 1.

3. The boundary width W2 is 70% or more and 90% or less of the maximum width W1, The tooth model according to Claim 1 or 2.

4. The model dental calculus includes a small model dental calculus with the maximum width W1 of 0.3 mm ≤ W1 < 0.7 mm, wherein the small model dental calculus has the boundary width W2 satisfying W2 ≤ W1, The tooth model according to any one of Claims 1 to 3.

5. A plurality of the model dental calculi are provided on the side surface of the model tooth body, and the plurality of the model dental calculi form an aggregate of the plurality of the model dental calculi with an interval between each other of 0.5 mm or less, The tooth model according to any one of Claims 1 to 4.

6. A plurality of the aggregates are provided, and an interval between the aggregate and the aggregate is 1 mm or more, The tooth model according to Claim 5.

7. When the model dental calculus has an elongated shape, the maximum width W1 is the maximum width in the minor axis direction, The tooth model according to any one of Claims 1 to 5.

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