JPH1057147A - Toothbrush capable of brushing wisdom tooth - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently brush even a wisdom tooth by making the thickness of a block bead in the length direction of bristles thinner at a tip side part than a handle side part. SOLUTION: The tuft base 13 of the block bead is integrally formed with a handle and short bristles 11 and long bristles 12 are flocked to the tuft base 13. A part to flock the short bristles 11 is the tip side part of the tuft base 13 and the part to flock the long bristles 12 is the handle side part of the tuft base 13. The bristle base 13 is bent to a bristle surface side at a tip part where the short bristles 13 are flocked and a step is present on the bristle surface of the tuft base 13. The tip side part at the tuft base 13 is bent to the bristle surface side, the bristle surface of the bristle base 13 is turned to two stages, the bristles at the tip side part are turned to the short bristles 11 and the thickness of the tuft part is made thinner at the tip side part than the handle side part. Also, the thickness of the short bristles 11 is made thin and the hardness of the short bristles 11 and the long bristles 12 is made equal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toothbrush which can easily polish back teeth (wisdom teeth and molars) which are difficult to polish due to a small gap between teeth and cheeks, and in particular, can easily polish the outer surface of wisdom teeth (wisdom teeth). .

[0002]

FIG. 6 is a perspective view showing a conventional toothbrush. This toothbrush comprises a flock 1 and a handle 2. The flocking portion 1 includes a large number of bristles 3 and a flocking table. The flocking table is made of plastic molded integrally with the handle 2, and has a plurality of tuft holes 5 formed on one surface. Tufts 4 of hair are implanted in the holes 5 of the tufts of hair. Many hairs 3 are mainly made of nylon and are almost the same length,
They are planted on the flocking table almost parallel to each other. The surface on which the hole 5 of the tuft of hair is provided in the flocking table is referred to as a flocking surface. In addition, the hair 3
The surface where no is planted is called the back surface. Multiple tufts of hair 4
The surface (envelope surface) connecting the tips of the bristles 3 is substantially a plane, and the plane is parallel to the back of the flocking table. Therefore, the thickness from the envelope surface of the bristle 3 to the back of the flocking table is constant in the length direction of the flocking portion 1.

In the toothbrush of FIG. 6, a handle 2 and a flock 1
Is integrally formed with the flocking table, but there is also a toothbrush having a structure in which the handle 2 and the flocking table are detachably connected.

[0004]

The hair 3 of the flock 1 has
In order to brush the entire teeth efficiently and not to damage the gums, a certain elasticity and flexibility are required.
In order to have a certain elasticity and flexibility, the hair 3
Some length and thickness are required. Conventional toothbrushes have medial and lateral surfaces (lingual and labial) of the front and canines,
It is formed to a certain thickness that is convenient for brushing the surface of the tooth, such as the upper surface (occlusal surface) and the inner surface (lingual surface) of the molar, which has a relatively large margin in the space where the flocked portion 1 is located. Was. Therefore, in the conventional toothbrush of FIG. 6, the thickness from the back of the flocking table in the flocking section 1 to the envelope surface connecting the tips of the bristles 3, that is, the thickness of the flocking section 1 is constant in the longitudinal direction of the flocking table. It is.

FIG. 4 is a diagram showing the structure of the teeth and the bone around the teeth when the mouth is closed, and FIG. 5 is a diagram showing the structure of the teeth and the bone around the teeth when the mouth is open.

The gap between the teeth and the buccal mucosa is called the oral vestibule,
The oral vestibule is wide at the front teeth and narrow at the molars. In particular, it is extremely narrow at the wisdom tooth located at the rearmost position in the molar teeth. The following are two causes of the narrow oral vestibule in the molar part (including the wisdom part).

[0007] One of the causes is due to the cheek muscle, which applies a certain tension to the cheek according to the opening and closing of the mouth, and prevents damage to the teeth during chewing. It also has the effect of making the cleft straight and reducing the size of the oral vestibule.

As a second cause, when a human is opened as shown in FIG. 5, the mandibular condyle 22 comes off the joint fossa 21 forward. A muscle projection 23 projects in front of the mandibular head 22,
Below that is the mandibular branch 24. Tooth brushing is usually done with the mouth open in front of a mirror, but when the mouth is opened, the muscular protuberances 23 and the mandibular branch 2
4 moves in the direction of arrow 9 and moves forward, directly narrowing the oral vestibule of the upper molar 25, and compressing the buccal muscle to narrow the oral vestibule of the lower molar.

In the conventional toothbrush having the structure shown in FIG. 6 which is conveniently made for brushing the main part of the tooth, the thickness of the flocked portion 1 is too large to reach the wisdom tooth. Therefore, if you brush your teeth with a conventional toothbrush, even wisdom teeth that have erupted normally can quickly become caries or peridontitis (inflammation that infects surrounding teeth and bones) due to poor cleaning. It was normal. Therefore, in general, when a wisdom tooth erupted, it was necessary to remove the tooth at a dental clinic in most cases.

[0010] The general idea that wisdom teeth are extracted because they quickly become tooth decay or open their jaws is rooted in both dentists and patients. Therefore, an object of the present invention is to provide a toothbrush capable of brushing teeth sufficiently to a wisdom tooth.

[0011]

In order to solve the above-mentioned problems, the present invention provides the following means.

The flocked portion comprises a handle and a handle, and the flocked portion includes a plurality of bristles and a flock. The plurality of bristles are planted substantially in parallel on one surface of the flock. The tip of the toothed brush is substantially flat, and the handle is formed integrally with the flocking table or in a toothbrush detachably connected to the flocking table. A toothbrush characterized in that a thickness is thinner at a tip side portion than at a handle side portion.

[0013] The toothbrush according to the above, wherein a length of the bristle of the tip side portion is shorter than a length of the bristle of the handle side portion.

[0015] The hair of the tip side portion is softer than the hair of the handle side portion.
Or the toothbrush according to.

[0015]

Next, the present invention will be described in more detail with reference to the embodiments of the present invention.

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a side view showing the embodiment, and FIG. 3 is an enlarged side view showing the flocking portion 1 of FIG.

In this embodiment, the flocking table 1 of the flocking section 1
3 is formed integrally with the handle 2. In the flocking table 13,
Short hairs 11 and long hairs 12 are planted. The portion where the short hairs 11 are planted is the tip side portion of the flocking table 13, and the portion where the long hairs 12 are planted is the handle side portion of the flocking table 13. The flocking table 13 is bent to the flocking surface side at the tip end portion where the short hair 11 is planted, and the flocking surface of the flocking table 13 has a step. In FIG. 3, a is the thickness of the tip side portion of the flocking table 13, b is the length of the short hair 11, c is the flocking table 13
Is the distance from the back surface 13a of the tip side portion to the tip of the short hair 11, that is, the thickness of the flocked portion 1 at the tip side portion in the length direction of the hair, and d is the back surface (holding) This is the distance from the back surface 2a of the hand 2) to the tip of the long hair 12, that is, the thickness of the flocked portion 1 on the handle side in the length direction of the hair. The length of the long hair 12 is the same as the length of the bristle 3 of the conventional toothbrush as shown in FIG.

The present invention employs a structure in which the tip can be easily inserted into the gap between the outside of the wisdom tooth and the buccal mucosa when a human opens, that is, into the oral vestibule at the wisdom tooth,
As a result, we aim at a toothbrush that can easily brush the outer surface of the wisdom tooth. In order to realize such a toothbrush, the means adopted in this embodiment is to make the length in the length direction of the bristle in the flocked portion 1, that is, the thickness smaller in the tip side portion than in the handle side portion. It is. Short hair 11
The envelope surface connecting the tip of the long hair 12 and the long hair 12 is the conventional hair 3 shown in FIG.
It is necessary that the surface be substantially flat like the envelope surface connecting the tips. Therefore, by bending the tip side portion of the flocking table 13 to the flocking surface side and setting the flocking surface of the flocking table 13 to two steps, and the bristle of the tip side portion as the short hair 11,
The thickness of the flocked portion 1 is made thinner at the tip end portion than at the handle side portion. Since the short hairs 11 are harder to bend than the long hairs 12, the hardness of the short hairs 11 against the teeth and gums is increased. Therefore, the thickness of the short hairs 11 was reduced, and the hardness of the short hairs 11 and the long hairs 12 were made equal.

When the toothbrush of this embodiment is used, the tip side portion of the flocked portion 1 can be easily inserted into the oral vestibule on the side (buccal side) outside the molar teeth, so that the plaque on the outer surface of the molar teeth can be easily removed. It can be removed, and thus can prevent caries (cavities) of molars such as wisdom teeth and peritonitis around wisdom teeth.

As means for making the thickness of the tip side portion of the flocking portion 1 smaller than the thickness of the handle side portion, there is also a structure in which the thickness a of the tip side portion of the flocking table 13 is made smaller than the thickness of the handle side portion. It is possible. However, the flocking table 13 needs a certain thickness in order to plant hair, and it is difficult to make the distal end portion of the flocking table 13 considerably thinner than the handle side portion. The structure shown in FIGS. 1 to 3 which is shorter than the hair on the handle side is practical.

Instead of making the short hair 11 thinner than the long hair 12, the material of the short hair 11 may be softer than the long hair 12.

[0022]

As described above in detail with reference to the embodiments, according to the present invention, it is possible to provide a toothbrush which can easily polish the outer surface of the molar teeth including the wisdom teeth. By using this toothbrush, plaque adhering to the wisdom teeth can be easily and sufficiently removed, and the wisdom teeth can be kept clean at all times, so that the necessity of extracting the normally erupted wisdom teeth is greatly reduced. In addition, this toothbrush has the same length, thickness and material long hairs as the conventional toothbrush on the handle side of the flocked portion, so that each part of the tooth other than the outer surface of the molar tooth is efficiently used in the same manner as the conventional toothbrush. Can be polished well.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a side view showing the embodiment of FIG. 1;

FIG. 3 is an enlarged side view showing the flocking portion 1 of FIG. 2;

FIG. 4 is a diagram showing a structure of a tooth and a bone around the tooth when the mouth is closed.

FIG. 5 is a diagram showing a structure of a tooth and a bone around the tooth when the mouth is open.

FIG. 6 is a perspective view showing a conventional toothbrush.

[Explanation of symbols]

1... Flocked part 2... Handle 2a... Back of handle 2... Hair 4... Tuft of hair 5. An arrow indicating the direction in which the muscle projection 23 moves when opened 9... Short hairs 12... Long hairs 13. ..Back face of flocking table 13 21..Glenoid fossa 22..Mandibular head 23..Muscle projection 24 ... Mandibular branch

Claims (3)

[Claims] 1. A flocking portion and a handle, wherein the flocking portion comprises a plurality of hairs and a flocking table, and the plurality of hairs are planted substantially in parallel on one side of the flocking table. Wherein the tips of the bristles are substantially flat and the handle is integrally formed with the flocked table or is detachably connected to the flocked table; A toothbrush characterized in that the thickness of the portion is smaller at the tip end portion than at the handle side portion. 2. The toothbrush according to claim 1, wherein the length of the bristle of the tip side portion is shorter than the length of the bristle of the handle side portion. 3. The toothbrush according to claim 1, wherein the bristle of the tip side portion is softer than the bristle of the handle side portion.