WO2010116638A1

WO2010116638A1 - Teether

Info

Publication number: WO2010116638A1
Application number: PCT/JP2010/002100
Authority: WO
Inventors: 細谷美穂; 米津卓郎
Original assignee: コンビ株式会社; 学校法人東京歯科大学
Priority date: 2009-03-30
Filing date: 2010-03-25
Publication date: 2010-10-14
Also published as: TW201105314A; JPWO2010116638A1; JP5658140B2; TWI462736B

Abstract

A teether which allows the baby to freely move the teeth in the top-bottom and left-right directions. The edge of a projection section (14) of a teether (11) has a recess (14a) curved in a circular arc shape toward the center of the teether (11). The front surface of the projection section (14) has formed therein a groove (20) in which the row of teeth in the upper jaw of the baby is positioned when the baby holds the teether between the teeth. A groove (22) in which the row of teeth in the lower jaw is positioned is formed in the rear surface of the projection section (14).

Description

Because of teeth

The present invention relates to a tooth used for giving a predetermined feeling to an infant's teeth when the infant bites.

Babies start sucking their fingers from around 2 or 3 months after birth. When you are able to grasp an object, bring it to your mouth and lick it. In addition, when the deciduous teeth grow, the gums are irritated and uncomfortable, so it is said that infants want to put something in their mouths and lick or bite.

JP 2004-321236 A JP 2004-321239 A

In general, teeth are used to stimulate the lips, tongue, gums, etc. of infants at such times due to various hardness and surface irregularities.
However, since the conventional teeth are not formed according to the dentition of the infant, the infant interferes when moving the teeth up and down and left and right.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a tooth for which an infant can freely move a tooth up, down, left and right.

In order to solve the above-described problems of the prior art and achieve the above-described object, the teeth of the present invention include a biting portion that can be bitten by a user, and the user's teeth are included in the biting portion. Guide grooves for guiding the rows are formed.
In the tooth of the present invention, when the user bites the bite portion, the tip end of the tooth row is guided by the guide groove.

Preferably, for the tooth of the present invention, the guide groove is formed so as to draw an arcuate track that protrudes inward from the edge side of the bite portion.
By forming the guide groove in an arc shape corresponding to the shape of the tooth row, the tooth row can be evenly guided.
Preferably, for the tooth of the present invention, a concave portion is formed at the edge of the bite portion so that the tongue of the user can be positioned.
By forming such a recess, it is possible to prevent the movement of the user's tongue from being hindered.

Preferably, the tooth of the present invention includes a first guide groove for guiding the upper dentition of the user and a second guide groove for guiding the dentition of the lower jaw of the user. An arcuate locus is formed on the bite portion.

Preferably, the tooth of the present invention is formed with a recessed surface between the second guide groove and the edge of the bite portion so that the user's tongue can be positioned.
Preferably, in the tooth of the present invention, the first guide groove and the second guide groove are formed at the same position from the edge of the bite portion.
Preferably, for the tooth of the present invention, the second guide groove is formed at a position closer to the edge of the bite portion than the first guide groove.
Preferably, for the tooth of the present invention, the first guide groove and the second guide groove have substantially the same cross-sectional shape.
Preferably, for the tooth of the present invention, the first guide groove and the second guide groove have different cross-sectional shapes.

Preferably, the tooth according to the present invention has a first surface extending from the first guide groove toward the edge of the bite part, and from the first guide groove toward the inside of the bite part. The first surface is formed at a position higher than the deepest portion of the first guide groove as compared to the second surface.
Preferably, the tooth of the present invention is formed from the vicinity of the edge of the second portion of the second guide groove formed on the back surface on the edge side of the bite portion toward the surface on which the first guide groove is formed. Has an inclined surface.

According to the present invention, by forming the guide groove for guiding the tip of the dentition, it is possible to provide a tooth that allows the infant to freely move the teeth up, down, left and right.

1A is a perspective view of a tooth, FIG. 1B is a plan view of the tooth, FIG. 1C is a side view of the tooth, and FIG. 1D is a cross-sectional view taken along the line X1-X1. FIG. 2 is a view for explaining the size and dimensions for the teeth shown in FIG. 3A and 3B are views for explaining the depth of the upper dentition groove for the teeth shown in FIG. FIG. 4 is a view for explaining the size and dimensions for the teeth shown in FIG. FIG. 5 is an external view for a tooth according to a second embodiment of the present invention. 5A is a plan view for teeth, FIG. 1B is a side view for teeth, and FIG. 1C is an X2-X2 cross-sectional view for teeth. FIG. 6 is an external view for a tooth according to a third embodiment of the present invention. 6A is a plan view for teeth, FIG. 6B is a bottom view for teeth, and FIG. 6C is an X3-X3 cross-sectional view for teeth. FIG. 7 is an external view for a tooth according to a fourth embodiment of the present invention. 7A is a plan view for teeth, FIG. 7B is a bottom view for teeth, and FIG. 7C is a side view for teeth. FIG. 8 is an X4-X4 cross-sectional view shown in FIG. 7 for the teeth of the fourth embodiment of the present invention.

<First Embodiment>
FIG. 1 is an external view of a tooth 11 according to the first embodiment of the present invention.
1A is a perspective view of a toothed tooth 11, FIG. 1B is a plan view of the toothed tooth 11, FIG. 1C is a side view of the toothed tooth 11, and FIG. 1D is a cross-sectional view of the toothed tooth 11 taken along X1-X1.
As shown in FIG. 1, the teeth 11 have a plate shape in which four projecting

portions

12a, 12b, 12c, and 14 project radially. As shown in FIG. 1B, the four projecting

portions

12a, 12b, 12c, and 14 are sequentially arranged at intervals of approximately 90 degrees in the circumferential direction of the plane. Here, the

protrusions

12a, 12b, and 12c have the same outer shape other than the uneven shape formed on the front surface or the back surface, and the edges of the

protrusions

12a, 12b, and 12c are semicircular arcs protruding outward. I am doing.

The protruding portion 14 is an example of the bite portion of the present invention. The edge portion of the protruding portion 14 forms a concave portion 14a that is curved in an arc shape toward the center side of the tooth 11 and thus the concave portion 14a is formed at the distal end portion of the protruding portion 14 as described above. In the state where the infant bites the tooth 11, the infant's tongue is positioned in the space inside the recess 14 a in a state where the infant's tongue can be freely moved up and down and left and right to some extent. Therefore, the movement of the infant's tongue is not hindered by the teeth 11.

As shown in FIG. 1C, an upper dentition groove 20 is formed on the surface of the protrusion 14, which is a first guide groove where the upper dentition of the infant is located when the infant crawls into the mouth. . Further, a lower jaw dentition groove 22, which is a second guide groove in which the lower dentition is located, is formed on the back surface of the protrusion 14.
The length H1 of the protrusion 14 shown in FIG. 1C is such that the

protrusions

12a and 12c (FIG. 1B) are obtained when the upper and lower dentitions of the infant are applied to the upper dentition groove 20 and the lower dentition groove 22, respectively. ) Is specified so that it does not hit the infant's face. In the present embodiment, the length H1 of the protrusion 14 is set to 14 mm, for example.
The vertical width shown in FIG. 1B defined by the

protrusions

12a and 12c of the toothing 11 is set to be sufficiently longer than the size of the infant's mouth. 11 can not be swallowed.

On the other hand, in FIG. 2, the maxillary dentition groove 20 is formed so as to draw a trajectory of a circular arc concentric with the circular arc of the concave portion 14a. The tip portion of the upper teeth of the infant is positioned in the upper teeth row groove 20.
Further, the lower dentition groove 22 is also formed so as to draw an orbit of a circular arc concentric with the arc of the recess 14 a, and the diameter of the circular arc is set to the same size as the upper dentition groove 20. Then, when the infant holds the teeth 11 by hand and puts it in the mouth, the lower teeth of the infant's lower teeth are positioned in the lower dentition groove 22.
That is, in the tooth profile 11 in the present embodiment, the upper dentition groove 20 and the lower dentition groove 22 are formed to form a concentric circular arc having the same diameter, and are separated from the recess 14a by a substantially equal distance. Formed in position.

Hereinafter, the maxillary dentition groove 20 will be described with reference to FIGS. 1 and 2.
As shown in FIG. 1D, the maxillary dentition groove 20 includes an end portion 32 having rounded corners forming a recess 14a, an inclined portion 34 gently falling from the end portion 32, a flat portion 36, and a flat portion. An inclined portion 38 that gently rises from the portion 36 is formed.
The concave portion 14a, the end portion 32, the inclined portion 34, the flat portion 36, and the inclined portion 38 form a concentric partial arc pattern having a common center point 41 as shown in FIG. This arc pattern is determined based on the shape of a normal dentition in a 3-year-old child.

Here, the radius R (14a) of the arc pattern of the recess 14a is, for example, about 12 mm, and the radius R (36) of the arc pattern of the flat portion 36 is, for example, about 18 mm. Moreover, the width of the flat part 36 is 0.8 mm, for example.
FIG. 3 is a diagram illustrating the depth of the flat portion 36. In the present embodiment, for example, the depth of the flat portion 36 gradually decreases from the end of the arc pattern toward the central portion.

By the way, according to “dental science report Vol. 79, No. 6 p117-123”, as shown in the example of the lower dentition shown in FIG. 4A and the upper dentition shown in FIG. With respect to each of the dentitions, the lip side edges 53 and 63 of the incisors of the milk incisors and the lip side edges 52 and 62 of the incisors of the canine teeth are connected on substantially the same circumference.
The average value of the arc radius is about 18.62 mm in the upper dentition shown in FIG. 4A and about 16.71 mm in the lower dentition shown in FIG. 4B.
The center of the arc pattern is substantially on the midline 57 in both the maxillary dentition and the mandibular dentition in the left-right direction.

The center 51a of the circular arc pattern of the maxillary dentition is about 1.8 mm ahead of the line 55 passing through the left first first molar most distal end 55 and perpendicular to the midline in the front-rear direction.
The center 61a of the circular pattern of the lower jaw is about 0.78 mm below the circumference in the upper dentition and about the circumference in the lower dentition for the milk side incisors on the line 55. is there.
The shapes and dimensions of the upper dentition groove 20 and the lower dentition groove 22 are defined based on the numerical values shown in FIG. 4 described above.

Further, as shown in FIG. 3, the mandibular dentition groove 22 is formed to gradually decrease in depth as it approaches the central incisor (anterior tooth) from the most distal end of the first milk tooth along the circular arc pattern. ing.
By doing in this way, it becomes easy to guide the front teeth naturally.

As the material for the teeth 11, for example, soft materials such as silicon rubber, polyethylene, polypropylene, TPE (thermoplastic elastomer) are used. Thereby, even if an infant bites, it can prevent a tooth | gear being damaged.
The material and configuration of the toothing 11 can be deformed even in the gums where the infant's deciduous teeth have just grown, and can withstand the forces caused by the engagement of the deciduous deciduous teeth.

The effect | action at the time of use of the tooth scale 11 is demonstrated.
The infant holds the tooth 11 with a hand or the like, and puts the protrusion 14 into the mouth.
At this time, as described above, the infant's maxillary dentition and mandibular dentition are guided to the positions of the maxillary dentition groove 20 and the mandibular dentition groove 22, respectively. The distal end of the lower dentition is aligned with the upper dentition groove 20 and the lower dentition groove 22.
At this time, the maxillary dentition groove 20 and the mandibular dentition groove 22 have an arc pattern corresponding to the arrangement of the actual maxillary dentition and the mandibular dentition, and have a sufficient width. Since the shape does not interfere with the rows, the infant can move the teeth up and down, left and right to some extent while the teeth are biting 11.

In addition, since the above-mentioned materials are used as the material for the teeth 11, when the infant bites, the gums are stimulated so as not to damage the infant's teeth. Moreover, since the tip part of the protrusion part 14 is a concave part 14a, the infant's tongue is positioned inside the concave part 14a in a state where the infant bites the tooth 11 and the infant's tongue moves. Unobstructed, infants can move their tongues freely.

As described above, the teeth 11 have the upper dentition groove 20 and the lower dentition groove 22 that guide the tip of the dentition, so that the infant bites, and the upper and lower gums and dentition of the infant Can be placed in the upper dentition groove 20 and the lower dentition groove 22 to train the teeth. Further, the upper dentition groove 20 and the lower dentition groove 22 have an arc shape corresponding to the actual arrangement of the upper dentition and the lower dentition, and have a sufficient width, and further, gums and dentitions. Therefore, the baby can move his / her teeth up / down / left / right to some extent while the baby is biting.

Second Embodiment
In the present embodiment, as in the first embodiment, the upper dentition groove and the lower dentition groove formed on the surface for teeth are formed in corresponding positions in the same pattern. However, the shape of the groove is different.
FIGS. 5A and 5B are external views of the tooth profile 111 according to the second embodiment of the present invention, FIG. 5A is a plan view of the tooth profile 111, FIG. 5B is a side view of the tooth profile 111, and FIG. Therefore, it is X2-X2 sectional drawing of 111. FIG.
As shown in FIG. 5, the tooth profile 111 has substantially the same shape as the tooth profile 11 shown in FIG. 1 except for the shapes of the maxillary dentition groove 120 and the mandibular dentition groove 122.

That is, similarly to the first embodiment described above, a concave portion 114a curved in an arc shape toward the center side of the tooth 111 is formed at the edge of the protruding portion 114, and the upper jaw tooth is formed on the surface of the protruding portion 114. A row groove 120 is formed, and a lower jaw row groove 122 is formed on the back surface.
Further, the upper dentition groove 120 is a partial arc pattern that is concentric with the arc of the recess 114a (see FIG. 2). The tip of the upper teeth of the infant is located in the groove 120. On the other hand, the mandibular dentition groove 122 is also a partial arc pattern that is concentric with the arc of the recess 114a (see FIG. 2). Within 122 is the tip of the lower jaw teeth of the infant.
Further, in FIG. 5, in the tooth profile 111 in this embodiment, the upper dentition groove 120 and the lower dentition groove 122 are formed so as to form a concentric circular arc having the same diameter, and are substantially equal from the recess 114a. It is formed at a position separated by a distance.

Hereinafter, the maxillary dentition groove 120 will be described.
As shown in FIG. 5C, the upper dentition groove 120 includes a flat part 132 with rounded corners forming a concave part 114 a, an inclined part 134 that gently falls from the flat part 132, and a lower end part of the inclined part 134. To a flat portion 136 disposed in parallel to the flat portion 132, and an inclined portion 138 that rises gently from the flat portion 136. The recess 114a, the flat part 132, the inclined part 134, the flat part 136, and the inclined part 138 form a concentric circular arc pattern having a predetermined center point in plan view. This arc pattern is determined based on the shape of a normal dentition in a 3-year-old child.

The lower dentition groove 122 has the same shape as the upper dentition groove 120. In this embodiment, the width A1 of the upper dentition groove 120 and the lower dentition groove 122 shown in FIG. 5C is the same as that of the upper dentition groove 20 and the lower dentition groove 22 in the first embodiment described above. It is wider than the width A (see FIG. 1), for example, 2.2 mm.
By widening in this way, there is an effect that a wider range of infant mouth sizes can be accommodated.

<Third Embodiment>
In the present embodiment, unlike the first embodiment described above, the upper dentition groove formed on the front surface of the teeth and the lower dentition groove formed on the back surface have different shapes at different arc diameter positions. The case where it is formed will be described.
FIG. 6 is an external view of a toothed 211 according to the third embodiment of the present invention, FIG. 6A is a plan view of the toothed 211, FIG. 6B is a bottom view of the toothed 211, and FIG. 6C is a toothed. Therefore, it is X3-X3 sectional drawing of 211. FIG.
As shown in FIG. 6, the edge of the protruding portion 214 of the toothed portion 211 has an arc shape protruding outward, like the protruding

portions

212a, 212b, and 212c. The front surface and the back surface of the protrusion 214 are respectively formed with an upper circular dentition groove 220 and a lower dentition groove 222 in an arc pattern. The position and shape of these two grooves, and the surroundings thereof The shapes are different from each other.

In FIG. 6C, the surface of the protrusion 214 has a flat portion 232 from the edge side of the protrusion 214 toward the center of the teeth 211, an inclined portion 234 that descends from the flat portion 232, and an inclined portion 238 that rises from the inclined portion 234. The flat portion 239 is formed in order from the inclined portion 238 toward the inside. Here, the inclined portion 234 and the inclined portion 238 form a maxillary dentition groove 220. On the other hand, the flat portion 232 is formed at a position higher than the deepest portion of the maxillary dentition groove 220 as compared with the flat portion 239.

In addition, an inclined portion 252, a flat portion 256, and an inclined portion 258 are formed in this order from the end of the protruding portion 214 toward the center portion of the toothed portion 211 on the back surface of the protruding portion 214. A lower jaw dentition groove 222 is formed by 258. At this time, the edge side (left side in FIG. 6C) of the protrusion 214 of the lower dentition groove 222 is formed by the flat portion 256, so that there is almost no depth of the groove.
Here, the circular arc pattern of the upper dentition groove 220 and the lower dentition groove 222 is set to the same diameter (for example, about 18 mm). However, the lower jaw dentition groove 222 is formed to be shifted to the edge side (left side in FIG. 6C) of the protrusion 214 by about 2 mm as compared to the upper dentition groove 220.

According to the tooth length 211 in the present embodiment, the lower jaw dentition is positioned in front of the upper dentition because the lower dentition groove 222 is located on the end side compared to the upper dentition groove 220. It can suppress effectively that it comes out. Further, since the tongue can be positioned in the space formed by the inclined portion 252 on the back surface, the tongue can be moved freely. Furthermore, since the end portion side of the lower dentition groove 222 is a flat portion 256, the infant can move the lower dentition in a wide range.
In the above-described embodiment, the case where the maxillary dentition groove 220 and the mandibular dentition groove 222 have the same diameter has been described. However, the same diameter is not necessarily required, and different diameters may be used.

<Fourth embodiment>
In the present embodiment, similar to the third embodiment described above, the upper dentition groove formed on the front surface of the teeth and the lower dentition groove formed on the back surface have different arc diameter positions. The case where it is formed will be described.
FIG. 7 is an external view of the tooth 311 according to the fourth embodiment of the present invention. 7A is a plan view of the toothed 311, FIG. 7B is a bottom view of the toothed 311, and FIG. 7C is a side view of the toothed 311. FIG. 8 is a sectional view taken along the line X4-X4 shown in FIG.

As shown in FIG. 7, the edges of the protruding

portions

312a, 312b, and 312c of the teeth 311 have a semicircular arc shape protruding outward. On the other hand, the edge of the protruding portion 314 is formed with a concave portion 314a that is curved in an arc shape toward the center side of the tooth 311 due to the teeth.
The upper surface and the back surface of the protrusion 314 are respectively formed with an upper dentition groove 320 and a lower dentition groove 322 in a partial arc pattern. The position and shape of these two grooves, and the shape of the periphery thereof. Are different from each other.

As shown in FIGS. 7A and 8, the surface of the protruding portion 314 has a flat portion 332, an inclined portion 334, and an inclined portion from the edge side of the protruding portion 314 toward the center of the tooth 311 (right side in FIG. 8). 338 are formed in order, and the upper dentition groove 320 is formed by the inclined portion 334 and the inclined portion 338.

Further, as shown in FIG. 7B and FIG. 8, an inclined portion 354 and an inclined portion 358 are formed on the back surface of the protruding portion 314 from the edge side of the protruding portion 314 toward the center side of the tooth 311 (right side in FIG. 8). These are formed in order, and thereby, a mandibular dentition groove 322 is formed. Here, the inclination angle of the inclined portion 354 is set smaller than that of the inclined portion 334.
Here, the arc patterns of the upper dentition groove 320 and the lower dentition groove 322 are set to have the same diameter (for example, about 18 mm). However, the lower jaw dentition groove 322 is formed to be shifted to the edge side (left side in FIG. 8) of the protrusion 314 by about 2 mm as compared to the upper dentition groove 320.

Further, the groove width (length in the left-right direction in FIG. 8) of the lower dentition groove 322 is formed wider than the groove width of the upper dentition groove 320. Further, the groove depth (length in the vertical direction in FIG. 8) of the lower dentition groove 322 is formed deeper than the groove depth of the upper dentition groove 320.

As described above, according to the teeth 311, the lower dentition 322 is located on the edge side of the upper dentition groove 320, so that the infant's lower dentition is positioned before the upper dentition. It can suppress effectively that it comes out. Further, since the tongue can be positioned in the space formed by the inclined portion 358 on the back surface, the tongue can be moved freely. Furthermore, since the lower dentition groove 322 is wider and deeper than the upper dentition groove 320, the infant can freely move the lower dentition over a wide range.

The teeth in the present invention are not limited to the first to fourth embodiments described above.
That is, those skilled in the art may make various modifications, combinations, subcombinations, and alternatives regarding the components of the above-described embodiments within the technical scope of the present invention or an equivalent scope thereof.
For example, the patterns and sizes of the upper dentition groove 20 and the lower dentition groove 22 formed in the protrusion 14 and the like described above are directed inward from the edge side of the protrusion 14 and the like in accordance with the infant's dentition. As long as it is curved, it is not limited to those described above. For example, the groove may be formed in an elliptical arc shape instead of an arc shape.

Moreover, although the case where the groove | channel for dentition was formed in both surfaces, such as the protrusion part 14, etc. was illustrated in embodiment mentioned above, you may form a groove | channel for dentition only in one surface.
In the above-described embodiment, the tooth 11 having four

protrusions

12a, 12b, 12c, and 14 is illustrated as an example, but the number of protrusions is not particularly limited as long as it is one or more.
Moreover, although the protrusion part 14 etc. were illustrated as an example of the to-be-bited part of this invention in embodiment mentioned above, as long as an infant can bite, a to-be-parted part etc. may be sufficient as an to-be-bited part.

The present invention is applicable to teeth that are used to give a predetermined feel to an infant's teeth when the infant bites. +

11, 111, 211, 311...

Toothed

14, 114, 214, 314... Projecting

part

14 a, 114 a... Recessed

part

20, 120, 220, 320 ... groove for

upper dentition

22, 122, 222, 322. Groove

Claims

It has a bite part that can be bitten by the user,
A guide groove for guiding a user's dentition is formed in the bite portion.
The tooth according to claim 1, wherein the guide groove is formed so as to draw an arc-shaped trajectory projecting inward from the edge side of the bite portion.
The tooth according to claim 1 or 2, wherein a curved recess is formed at an edge of the bite portion so that the tongue of the user can be positioned.
The first guide groove for guiding the upper dentition of the user;
The tooth according to any one of claims 1 to 3, wherein the second guide groove for guiding the user's lower jaw dentition and an arcuate locus are formed in the bite portion.
The tooth according to claim 4, wherein a recessed surface is formed between the second guide groove and an edge of the bite portion so that the tongue of the user can be positioned.
The tooth according to claim 4 or 5, wherein the first guide groove and the second guide groove are formed at the same position from an edge of the bite portion.
The tooth according to claim 4 or 5, wherein the second guide groove is formed at a position closer to the edge of the bite portion than the first guide groove.
The tooth according to claim 4 or 5, wherein the first guide groove and the second guide groove have substantially the same cross-sectional shape.
The tooth according to claim 4 or 5, wherein the first guide groove and the second guide groove have different cross-sectional shapes.
A first surface extending from the first guide groove toward the edge of the bite portion;
A second surface extending from the first guide groove toward the inside of the bite portion,
The tooth according to claim 4, wherein the first surface is formed at a position higher than the deepest portion of the first guide groove as compared to the second surface.
The tooth according to claim 4, further comprising: a surface inclined from the vicinity of the edge portion of the second portion of the second guide groove formed on the back surface toward the surface on which the first guide groove is formed. Because.
The tooth according to any one of claims 1 to 11, wherein a depth of a central portion of the guide groove is shallower than a depth of a peripheral portion.