JP7284463B2 - tooth extraction tool - Google Patents

Description

TECHNICAL FIELD The present invention relates to a tooth extraction tool that enables safe, stable and easy tooth extraction and reduces the burden on patients.

In conventional dental treatment, when a tooth is extracted, a lever (Hebel) is inserted into the periodontal ligament around the root between the tooth and the alveolar bone to dislocate the tooth. It is common to pinch the tooth with forceps (pliers) and pull it out.
Examples of forceps are described in detail in JP-A-2002-291753, and examples of levers are described in JP-A-2009-119095.
However, if the tooth is pushed in by mistake when prying it with a lever, this may cause damage to the nerves, damage to the blood vessels, increased bleeding, or collapse of the alveolar bone. There is This is a big problem.
As a result of intensive research, the inventor of the present invention found that the tooth root is weak against twisting force and can be lifted from the alveolar bone relatively easily when twisted, so that the tooth can be easily extracted by pulling it out. I got some insight. Therefore, the tooth can be twisted without using leverage to lift the tooth from the alveolar bone, without being influenced or affected by adjacent teeth, and subsequent extraction of the tooth is also easy. is what you want to do.
Therefore, the present applicant has previously proposed a "tooth extraction tool" of Utility Model Registration No. 3162169. This tooth extraction tool (reamer) consists of a threaded portion to be screwed into the tooth and a handle portion to be picked up with the fingertips, and the handle portion is provided with a non-slip portion. When the threaded portion is screwed into the hole in the center of the tooth using the handle portion, the threaded portion bites firmly into the tooth. At this time, the tooth root is twisted and floated from the alveolar bone, so the tooth extraction is relatively easy and safe. In addition, since the force is applied only to the tooth to be extracted from the alveolar bone, adjacent teeth are less likely to be affected or affected. In addition, since the handle has a non-slip portion, it is possible to effectively apply the force of pinching with fingers or pinching and pulling with forceps to the threaded portion, that is, the teeth. Assuming that the non-slip portion is a hole or hook formed in the handle portion, the tip of the forceps or hook can be securely hooked to this hole or hook. The forceps and hooks in this case can be said to be greatly different from conventional levers in that they are pulled out by hooking on the tooth whose root has already been twisted and lifted by the threaded portion.
In addition, the tooth extraction tool of Japanese Patent Application Laid-Open No. 2018-175817 is an invention of the present applicant, which consists of an anchor part and a handle part, and UV resin is injected into the cavity part opened in the tooth by cutting. After pushing the anchor part inside, irradiate the UV resin with UV light with a pen-shaped UV light, harden the UV resin, fix the tooth extraction tool firmly to the tooth, and hold the handle part with your fingertips or forceps or use a crowbar. to pull it out.
For both the tooth extraction tool of utility model registration No. 3162169 and the tooth extraction tool of Japanese Patent Application Laid-Open No. 2018-175817, if the handle is pulled out by using forceps or a hook instead of being pulled out by grasping the handle with fingers, there is a special tool. Even better. I would like to be able to more stably pull out the teeth that have been lifted by the reamer with a special tool. An extractor of Utility Model Registration No. 3162226 has been proposed as a special tool for such a tooth extraction tool. This main part is a crowbar consisting of a crowbar handle and a hooking portion provided at the tip of the crowbar handle for hooking the reamer. It is used in such a way that the part or the hooking part is latched and then pulled out with a lever.

Certainly, when the extractor of utility model registration No. 3162226 is used alone, even if it is used like a lever, unlike conventional levers, it is used for teeth that are already floating. , has the effect of hardly affecting adjacent teeth. However, the reality is not like pulling a nail out of a flat wooden board. This is because the flat bottom of the crowbar may be pulled out due to special circumstances such as the patient's difficulty in opening the mouth during treatment, the shape of the mouth at that time, the posture of the doctor at that time, the alignment of the teeth, and the bite. This is because there are cases where it does not touch the dentition that is adjacent to the desired tooth. When inserting the crowbar into the patient's mouth and hooking it to the handle of the reamer, the corners of the teeth are searched with the flat bottom of the crowbar. That is, at present, there is a demand for tooth extraction tools that can be easily handled in the patient's oral cavity.
If this problem could be solved, the dentist's job would be easier and less tiring. Accordingly, an object of the present invention is to solve the above-mentioned problems and to provide a tooth extraction tool which can be easily handled in an inconvenient intraoral cavity and which enables tooth extraction to be performed more safely and easily.

The above problem is a tooth extraction tool for hooking an anchor fixed to a tooth and extracting the tooth by the principle of leverage, which comprises a handle and a hook provided at the tip of the handle, This is achieved by providing a tooth extraction tool in which the hooking portion is provided with a hooking groove for bifurcating the portion, and the bottom portion of the hooking portion is provided in a curved shape.
Since patients normally open their mouths as thinly as possible, even if they have some difficulty in inserting the tooth extraction tool into their mouth, there is a mechanism for hooking it to the handle of the reamer. Since the bottom part of the hooking part provided with the hooking groove is curved, it is possible to smoothly explore the contact condition of the corners and flat surfaces of the teeth with the curved bottom part of the crowbar. It is very easy to handle in the oral cavity.
In addition, the above-mentioned problem is a tooth extraction tool for extracting a tooth by the principle of leverage by hooking an anchor fixed to the tooth, which comprises a handle and a curved bottom provided at the tip of the handle. This is achieved by providing a tooth extraction tool comprising a hook portion and a hook hole provided on the front side or rear side of the hook portion.
In the tooth extraction tool of claim 1, the anchor is hooked in the hooking groove of the hooking portion. In the case where the hooking groove is provided at the tip of the hooking part, the rear curved bottom part is used as a lever for the tooth behind the hooked anchor. make sure to However, if there are no teeth at the rear, it is difficult to find a place to apply the curved bottom. Therefore, on the contrary, a hooking hole is provided on the rear side, the anchor is hooked here, and the curved bottom part in front of this is placed on the front tooth when viewed from the tooth on which the anchor is hooked. I made it. Such a hooking hole can be provided on the front side of the curved bottom portion instead of the hooking groove of claim 1 .
Further, the above-mentioned problem is a tooth extraction tool for extracting a tooth by the principle of leverage by hooking an anchor fixed to the tooth, and is provided with: (1) a handle and a hook provided at the tip of the handle; , a connecting shaft positioned between them, and an engaging groove provided in the engaging portion for bifurcating the portion; (2) a base handle; and a tip of the base handle. (3) the hooking portion; is fitted into the connecting groove to integrally connect the crowbar and the base to open the handle and the base handle, the hooking portion of the crowbar fits into the abutting portion of the base. This is achieved by providing a tooth extraction tool, characterized in that the abutting portion is provided with a notch as shown in FIG. It is also possible to provide an extractor comprising a plurality of burls each having a different shape of the hooking portion and a single base. Also in this case, the bottom portion of the contact portion of the base is configured to be curved.
The extractor for this reamer has two uses. One method is to use only the crowbar alone to engage the hole formed in the handle of the reamer or the engaging portion with the engaging portion, and pull out the reamer while performing the above-described groping. At this time, it can be used like a lever, but unlike the conventional lever, it is used for teeth that have already been lifted, so there is almost no effect on adjacent teeth. In addition, it is possible to form the bottom portion of the hooking portion of the bar in a curved shape. In this case, the curved shape may be matched with the bottom of the contact portion of the base.
The second method is to use the burl and the base by connecting them together. That is, for example, the abutting portion of the base is passed over the teeth on both sides of the raised teeth, and while performing the above-mentioned searching, the hooking portion engages the hole formed in the handle portion of the reamer and the hooking portion. The crowbar and the base are connected and integrated by fitting the connecting shaft into the connecting groove while being hooked, the crowbar handle and the base handle are gripped like forceps, and the reamer is pulled out by the crowbar while the state is stabilized by the base. This method is used as follows. It is possible to perform the above search even after the burl and the base are connected and integrated. Alternatively, the crowbar and the base are connected and integrated by fitting the hooking portion into the connecting groove to open the crowbar handle and the base handle. If the reamer can be protruded downward from the notch of the abutting portion, the reamer is protruded downward, and the reamer is engaged with the engaging portion while searching as described above, and then the bar handle and the base handle are closed. is the method to use. In these cases, too, there is almost no effect on adjacent teeth because they are used for teeth that have already been lifted.
The abutting portion of the base has an annular shape, and the notch portion is a hole inside the annular abutting portion. It can be designed to have space to pass through. In addition, in order to create a space through which the reamer can pass through the hooking portion, the contacting portion of the base may be configured such that a portion of the contacting portion, such as the tip portion, is left open, instead of making the contacting portion annular.
When the hooking portion is fitted into the connecting groove to connect and integrate the bar and the base, one or both of the connecting shaft and the connecting groove may be magnetized. It is possible to further reduce the possibility that the connecting shaft and the connecting groove are magnetically attached to each other and unintentionally come off. This configuration can be realized by using a magnet for the connecting shaft or the connecting groove, or by magnetizing the connecting shaft or the connecting groove itself. The connecting shaft and the connecting groove may both be magnetized and magnetically attached to each other, or one may be magnetized and the other may be magnetically attached to it, such as iron. is also possible.
Further, the above-mentioned problem is a positive action forceps for tooth extraction for hooking an anchor fixed to a tooth and extracting the tooth by the principle of leverage, wherein the hooking portion at the tip of the first handle is the first handle. The first handle and the second handle protrude forward from the contact portion for contacting the teeth of the tip of the handle 2, and the hook portion is provided with a forked hook groove. The handle is rotatably provided on a rotating shaft, and a spring is attached between the first handle and the second handle behind the rotating shaft, and the bottom of the contact portion is This is achieved by providing an extraction tool characterized by being curved. In the forward-acting forceps, gripping the first handle and the second handle causes the hooking portion and the contacting portion of the distal end portions to move in the opening direction. Also, when the gripping force is relaxed, the tip closes with the help of the spring force.
Therefore, first, hold the handle of the reamer-like tooth extraction tool with your fingers, screw the threaded part into the tooth to be extracted, and then lift the contact part of the tip of the second handle so that the adjacent tooth is pulled. While performing the above-mentioned search by applying it to the first handle, while hooking the hole and the hooking portion formed in the handle portion of the reamer with the hooking portion at the tip of the first handle, the first handle and Grasp the second handle and pull out the reamer. Since this tooth extraction tool is used for teeth that have already been lifted, there is almost no effect on the adjacent teeth, and there is no need to dislocate the teeth with a lever (Hebel) or the risk of the alveolar bone sinking. The burden of is light.
In this way, by enabling the positive action forceps to perform the above-described search, similar to the other tooth extraction tools described above, the situation where the patient's mouth is difficult to open, the shape of the mouth at that time, the posture of the doctor at that time, and the alignment of the teeth It is possible to adapt extremely well to special circumstances such as occlusion and occlusion.
In any of the tooth extraction tools of claims 1, 2, 3, and 4, the bottom portion can be curved in the longitudinal direction of the tip portion. In particular, the tooth extraction tool of claim 1 consists of a handle and a hook provided at the tip of the handle, and the bottom is curved in the longitudinal direction of the handle and hook. There will be no choice. In addition, in the tooth extraction tool of claim 2, the bar and the base are integrally connected to form a forceps, and in the tooth extraction tool of claim 3, in the positive action forceps, the bottom is curved in the longitudinal direction of the tip. It will be what is provided in the form.
On the other hand, in the tooth extraction tools according to claim 1 and claim 2, the hooking portion has a substantially elliptical shape, and the bottom portion is provided in a curved shape in the entire circumferential direction. Is possible. This includes so-called spoon-like shapes. This facilitates the search in all circumferential directions, which is more convenient. In particular, when a patient is afraid of tooth extraction and only opens their mouth thinly, the spoon-like shape is less frightening to the patient and has the advantage of being easy to insert into the mouth.
In the case where the bottom portion is provided in a curved shape in the entire circumferential direction, the engaging groove may be provided on the side portion of the engaging portion. A side may be an anterior side, a medial side, a posterior side, or the like. In the case where the bottom portion is curved in all circumferential directions, it is easy to search in all circumferential directions. It was possible to hang the handle part of the Therefore, the groping in all circumferential directions is smooth, and it is easy to hook the reamer to the handle portion.
Next, regarding the tooth extraction tools of claims 1 and 2, the handle or the hook may have a mirror portion. Having a mirror section is convenient because the back side of the patient's teeth can be seen in detail. The mirror part may be a plated surface for the handle or the hook part, or may be an independent mirror attached. If the mirror section is a so-called plane mirror, a mirror image of equal magnification can be obtained, and if it is a concave mirror, a magnifying mirror image can be obtained.
Further, with respect to the tooth extraction tools of claim 1 and claim 2, the handle or the hooking portion may be provided with a pattern to reassure the patient. If the latching part has a so-called spoon-like shape, even if the patient is afraid of tooth extraction and only opens his/her mouth thinly, it is less frightening to the patient and has the advantage of being easy to insert into the mouth. I have already explained something. In order to further strengthen this advantage, I tried to include a design such as a so-called character picture. According to this, there is an effect that not only children but also adults can reassure patients who dislike dentists and patients who are not good at bright objects.
Further, in the tooth extraction tools of claims 1 and 2, the handle is provided with an audio generating circuit for generating an audio signal or an input portion for receiving an audio signal from an external audio generating device, and converting the audio signal into an audio vibration. It may have a transducing bone conduction transducer, a power source for driving the bone conduction transducer, and a power switch for turning these on and off. According to this method, when the sound signal is applied from the tooth, it is transmitted to the inner ear by bone conduction and the sound is heard. Healed. Therefore, the dentist takes advantage of this time to extract the tooth.
In other words, the sound signal emitted by the sound generating circuit or the sound signal from the external sound generating device is converted into sound vibration by the bone conduction transducer, and this sound vibration is used to obtain the tooth to be extracted and the fulcrum of the lever adjacent to it. It is added to the teeth and bones of the body, and further stimulates the auditory nerve through the bones. It is thanks to bone conduction that Beethoven, who had become deaf, was able to hear the bone-conducted sound and continue composing by pressing the baton that he had chewed with his teeth against the piano. His music heals us now. Voice can be voice or music. In the case of voice, it can be a non-painful suggestion. It is also possible to record the voice of the parent for the child and design it so that this voice can be used. It is also possible to have both an audio generating circuit for outputting an audio signal and an input section for an audio signal from an external audio generating device. The power supply may be an internal battery or a connector to an external power supply.
It is also possible to provide a combination of the tooth extraction tool for reaming and this reamer as described above. A plurality of types of reamers having different overall sizes and shapes may be combined with one type of tooth extraction tool. Similarly, it is possible to provide a set of tooth extraction tools of different sizes, such as large, medium and small.

According to the present invention, it was possible to provide a crowbar-shaped tooth extraction tool that is effective in extracting teeth that have been lifted using utility model registration No. 3162169, utility model registration No. 3162226, and the like. According to this, adjacent teeth are hardly affected, and tooth extraction can be performed safely, stably, and easily, and there is an effect that the burden on the patient is light. This also produces effects such as making the dentist's job easier and less tiring. The tooth extraction tool of the present invention can be used as a lever (Hebel).
It should be noted that a device having a mirror portion on the handle or hook portion is convenient because the back side of the patient's teeth can be seen in detail by the mirror portion. In addition, a pattern such as a picture of a character on the handle or hook has the effect of reassuring the patient, regardless of age or child. In addition, since voices and music can be heard in a strange way in those equipped with bone conduction transducers, it is possible to give comfort and a sense of security to patients. This also reduces the physical and mental burden on the dentist himself.

FIG. 1 is an explanatory diagram of a side view of the first embodiment.
FIG. 2 is an explanatory diagram in which the first embodiment is viewed obliquely.
FIG. 3 is an explanatory diagram of the usage state of the first embodiment.
FIG. 4 is an explanatory diagram of a plan view of the second embodiment.
FIG. 5 is an explanatory diagram of the first embodiment viewed from the side.
FIG. 6 is an explanatory diagram of a plan view of the third embodiment.
FIG. 7 is an explanatory diagram of the fourth embodiment viewed from the side.
FIG. 8 is an explanatory diagram of the fourth embodiment viewed from the side.
FIG. 9 is an explanatory diagram of the fifth embodiment as viewed from the side.
FIG. 10 is an explanatory diagram of a side view of the fifth embodiment.
FIG. 11 is an explanatory diagram of the sixth embodiment viewed from above.
FIG. 12 is an explanatory diagram of the usage state of the sixth embodiment.
FIG. 13 is an explanatory diagram of the seventh embodiment viewed from above.
FIG. 14 is an explanatory view of the cross section of Example 7 as viewed from the side.
FIG. 15 is an explanatory diagram of the eighth embodiment viewed from above.
FIG. 16 is an explanatory diagram showing a block diagram of the eighth embodiment.

The bur-shaped tooth extraction tool of this embodiment will be described with reference to FIGS. 1 to 3. FIG. The tooth extraction tool 1 is composed of a handle 10 and a hook portion 11 provided at the distal end thereof. In particular, the bottom portion of the hooking portion 11 is formed as a curved portion 12 convexly curved downward in the longitudinal direction of the tooth extraction tool 1 . This is best seen by the dashed auxiliary lines. It's like the base of a rocking chair. A hooking groove 13 is formed at the tip of the hooking portion 11 to bifurcate this portion. A reamer 8 , which will be described later, is engaged with this engaging groove 13 .
A detailed description of the reamer 8 that fits this tooth extraction tool 1 is omitted, but this one has, for example, a threaded portion 80 for screwing into the tooth and a handle portion 81, which are connected by a shaft portion 82 as a central axis of rotation. The shaft portion 82 and the handle portion 81 form a T-shape when viewed from the side. A portion on the side of this T-shape is a hooking portion, which is hooked by the hooking portion 11 of the tooth extraction tool 1 described above. Note that the reamer 8 is not an essential requirement of the present invention.
In this usage, the handle portion 81 of the reamer 8 is held between the thumb and the index or middle finger, the screw portion 80 is inserted into the root canal of the decayed tooth, and the handle portion 81 is rotated clockwise with the pinched fingers. In this way, the threaded portion 80 is firmly bitten into the root of the tooth, but at this time, the torsion applied to the decayed tooth causes the decayed tooth to float. Therefore, as shown in FIG. 3, in order to grasp the handle 10 and hook the hooking groove 13 of the hooking portion 11 to the reamer 8, the curved portion 12 searches the upper surface portion of the tooth row adjacent to the carious tooth, and the hooking groove 13 is pulled. is hung on the reamer 8. Since the bottom portion of the hooking portion 11 is the curved portion 12, it is easy to slide and the handle 10 can be handled relatively freely. While manipulating the handle 10 of the tooth extraction tool 1, the reamer 8 is pulled out. At this time, it is also possible to use the tooth extraction tool 1 like a lever to pull out the reamer 8 .
In this way, adjacent teeth are hardly affected, and tooth extraction can be performed safely, stably, and easily, thereby lightening the burden on the patient.

4 and 5 show the tooth extraction tool 2 of this embodiment. This device is composed of a handle 20 and a substantially oval hooking portion 21 provided at the tip of the handle 20 . In particular, the bottom portion of the hooking portion 21 is formed as a ship bottom portion 22 convexly curved downward in the longitudinal direction of the tooth extraction tool 2 . Although this shape is similar to that of a spoon, the portion of the hooking portion 21 near the handle 20 is formed thick. A hooking groove 23 is formed at the tip of the hooking portion 21 to bifurcate this portion. A reamer is hooked in this hooking groove 23 . A lacing hole 24 is provided at the other end of the handle 20 .
Regarding this method of use, after the reamer is firmly bitten into the decayed tooth in the same manner as in Example 1, the handle 20 is gripped to hook the reamer on the hooking groove 23 of the hooking portion 21. The hooking groove 23 is hooked on the reamer while searching for the upper surface of the tooth row adjacent to the . In this way, the handle 20 of the tooth extraction tool 2 is freely manipulated while the reamer 3 is pulled out. At this time, the tooth extraction tool 2 can be used like a lever to pull out the reamer.
The probing of the ship bottom 22 differs from that of the first embodiment in that the wide ship bottom 22 similar to the shape of a spoon allows the user to search not only the upper surface of the tooth row but also the corners of the tooth row. It is at the point where it is possible. Since it is possible to search for the corners of teeth and steps in the dentition, it is possible to detect situations in which the patient's mouth is difficult to open, the shape of the mouth at that time, the posture of the doctor at that time, the alignment of the teeth, and the bite. Special circumstances can be dealt with. To express this, it means that the point of contact between the reamer of the hooking groove 23 and the teeth of the ship bottom 22 and the handle 20 are aligned with each other. In addition, since the hooking portion 21 exhibits the shape of the ship's bottom at the bottom portion 22 to provide strength, it is possible to configure the hooking portion 21 to be thin.
In this way, adjacent teeth are hardly affected, and tooth extraction can be performed safely, stably, and easily, thereby lightening the burden on the patient. It also has the effect of making the dentist's work easier and less fatigued. Since the hooking portion 21 has a substantially oval shape, there is little resistance when inserting it into the patient's mouth, and in this sense, it is a safe tooth extraction tool.

FIG. 6 shows the tooth extraction tool 25 of this embodiment. Although most of the configuration of this device is similar to that of the above-described second embodiment, the configuration of the hooking portion 26 is different. That is, the bottom portion of the hooking portion 26 is a ship bottom portion 27 that is convexly curved in the longitudinal direction of the tooth extraction tool 25 and downward. A locking groove 28 and a locking groove 29 are provided. Hooking grooves 28, 28 are formed on both sides of the hooking groove 23 on the front side of the side of the hooking portion 26, and hooking grooves 29, 29 are formed on both sides of the rear side of the hooking portion 26. is provided. There is also a design in which another locking groove is provided between the locking groove 28 and the locking groove 29 . This is due to the fact that the hooking portion 26 has a substantially oval shape.
As described above, it is very user-friendly and convenient that the hooking groove 28 and the hooking groove 29 can be used together according to the patient's difficulty in opening the mouth and the doctor's posture. .

7 and 8 show the tooth extraction tool of this embodiment. The base 4 includes a base handle 40 and a contact portion 42 provided at the tip portion thereof for contacting the occlusal surfaces of the teeth, and positioned between them to rotate the left and right connecting shafts 31 of the burls 3, which will be described later. It is composed of two connecting grooves 41 for movably fitting. Further, the contact portion 42 is provided with an annular notch portion 44 in which the hook portion 32 of the bar 3 (to be described later) is accommodated. The bottom portion of the contact portion 42 is a curved portion 43 that is convexly curved downward in the longitudinal direction of the base 4 .
On the other hand, the crowbar 3 is composed of a crowbar handle 30, an engaging portion 32 provided at the tip of the crowbar handle 30, and left and right connecting shafts 31 positioned between them and fitted in a connecting groove 41 of the base 4 so as to be rotatable. It is A hooking groove 33 is formed at the tip of the hooking portion 32 to bifurcate this portion. A handle portion 81 of the reamer 8 , which will be described later, is engaged with the engaging groove 33 .
Next, in order to combine the base 4 with the burl 3 as shown in FIG. The crowbar 3 is connected and integrated, and in the space formed ahead of the hooking portion 32 of the crowbar 3 in the annular cutout portion 44 (a hole portion inside the contact portion 42) of the base 4, The reamer 8 biting into the carious tooth is positioned, and the abutting part 42 of the base 4 is applied to the tooth on both sides while searching for the upper surface parts of the tooth on both sides of the carious tooth that is lifted by the curved part 43. while the hooking groove 33 is hooked on the reamer 8. In this way, the base handle 40 and the burl handle 30 are gripped like forceps, and the reamer 8 is pulled out by the burl 3 while the base 4 stabilizes the condition.
It should be noted that it is possible to use the burl 3 alone, as shown in FIG. 7, according to one of the two uses described above. The bar handle 30 is grasped and the hooking groove 33 of the hooking portion 32 is hooked on the handle portion 81 of the reamer 8 to pull out the reamer 8. - 特許庁At this time, it is also possible to pull out the reamer 8 by using the bar 3 of this embodiment like a lever. It is also possible to configure the bottom portion of the hooking portion 32 of the crowbar handle 30 to be a curved portion that curves downward in the longitudinal direction of the crowbar 3 . Also, this curved portion can be made to have a similar degree of curvature in conformity with the curved portion 43 which is convexly curved downward in the longitudinal direction of the base 4 . As a result, the crowbar 3 can perform the above-mentioned searching even by itself.

9 and 10 show the tooth extraction tool 5 (positive action forceps) of this embodiment. A hooking portion 51 at the tip of the first handle 50 protrudes further forward than a contacting portion 54 that is the tip of the second handle 53 and is brought into contact with the tooth, and the hooking portion 51 is bifurcated. A locking groove 52 is provided. The first handle 50 and the second handle 53 are rotatably provided on a rotating shaft 56 and are located behind the rotating shaft 56 between the first handle 50 and the second handle 53 . A spring 57 is attached. In particular, the bottom portion of the contact portion 54 is provided in a curved shape to form a curved portion 55 .
In the forward-acting forceps, when the first handle 50 and the second handle 53 are gripped, the hooking portion 51 and the contact portion 54 at the tips of the forceps move in the opening direction. By loosening the gripping force, the force of the spring 57 is also applied to automatically close the tip portion.
In this usage, the abutting portion 54 at the tip of the second handle 53 is brought into contact with the adjacent teeth of the raised teeth, and while performing the above-described searching, the first handle 53 is applied at this time. While a handle portion 81 as a hooking portion of the reamer 8 is hooked by a hooking portion 52 at the tip of the handle 50, the first handle 50 and the second handle 53 are gripped to pull out the reamer 8. . The probing is made possible by providing the curved portion 55 .
In this way, by enabling the tooth extraction tool 5, which is a positive action forceps, to perform the above-mentioned groping, similar to the other tooth extraction tools described above, the patient's mouth is difficult to open, the shape of the mouth at that time, and the doctor at that time. It is possible to adapt extremely well to special circumstances such as the posture of the body, the alignment of the teeth, and the occlusion. Since this tooth extraction tool 5 is also used for a tooth that has already been lifted, there is almost no effect on adjacent teeth, and there is little need to dislocate a tooth with a lever (Hebel) and there is little risk of the alveolar bone sinking. It's a light burden.

11 and 12 show the tooth extraction tool 6 of this embodiment. This device is composed of a handle 60 and a substantially oval hooking portion 61 provided at the tip of the handle 60 . In particular, the bottom portion of the hooking portion 61 is formed as a ship bottom portion 62 that is convexly curved downward in the longitudinal direction of the tooth extraction tool 6 . Although this shape is similar to that of a spoon, the portion of the hooking portion 61 near the handle 60 is formed thick. A hooking groove 63 is formed at the tip of the hooking portion 61 to bifurcate this portion. Also, at the rear end of the hooking portion 61, a circular hole large enough to allow the handle portion 81 of the reamer 8 to pass through and a continuous elongated hole narrow enough not to allow the handle portion 81 to pass therethrough are continuously formed. A hooking hole 64 is formed. The hooking groove 63 reaches the edge of the hooking portion 61 , but the hooking hole 64 does not reach the edge of the hooking portion 61 . A hooking hole 64 can be provided instead of the hooking groove 63 . Accordingly, a configuration in which a hooking hole 64 is provided in place of the hooking groove 23 of the second embodiment is also within the scope of the present invention. The reamer 8 is hooked in the hooking groove 63 and the hooking hole 64 . The handle part 81 fits into the elongated hole so that it will not come off when the tooth is extracted. A stringing hole 65 is provided at the other end of the handle 60 .
Regarding this method of use, here, it is assumed that there is a chipped or loose tooth as indicated by the dashed line behind the decayed tooth into which the reamer 8 has been bitten. Otherwise, refer to the usage in Example 2. Therefore, after the reamer 8 is firmly bitten into the carious tooth, the handle 60 is gripped and the hooking hole 64 of the hooking portion 61 is hooked on the reamer 8, so that the upper surface portion of the row of teeth adjacent to the front of the carious tooth is held by the bottom portion 62 of the ship. The hooking hole 64 is hooked on the reamer 8 while searching. Thus, the reamer 8 is pulled out by pulling up the handle 60 of the tooth extraction tool 6 . This is an operation opposite to that of the second embodiment described above.

13 and 14 show the tooth extraction tool 66 of this embodiment. The basic configuration is similar to that of the sixth embodiment described above, and the overall shape is similar to that of a spoon, and is composed of a handle 60 and a substantially oval hooking portion 61 provided at the tip of the handle 60. . A hooking groove 63 is formed at the tip of the hooking portion 61 , and the hooking hole 64 is formed at the rear end of the hooking portion 61 . The bottom of the hooking portion 61 between the hooking groove 63 and the hooking hole 64 is formed flat, and its surface is mirror-finished to form a plane mirror 67 .
This plane mirror 67 allows a detailed view of the back side of the patient's teeth. Although the flat mirror 67 is formed by applying mirror plating to the hooking portion 61, it is also possible to embed a separate glass mirror. It is also possible to provide a concave mirror as a magnifying glass in place of the plane mirror 67 .
On the other hand, the handle 60 is printed with a pattern 68 of a cute animal. When the tooth extraction tool 66 is held out in front of the patient, the patient's eye will be drawn to the animal pattern 68 on the handle 60, which will distract the patient and reassure the patient. In addition to printing the pattern 68, a similar configuration can be realized by attaching a seal or molding the handle 60 in such a shape.

15 and 16 show the tooth extraction tool 7 of this embodiment. This device is composed of a handle 70 which is also a housing made of synthetic resin and a substantially oval hooking portion 71 provided at the tip of the handle 70 . In particular, the bottom portion of the hooking portion 71 is formed as a ship bottom portion 72 which is convexly curved downward in the longitudinal direction of the tooth extraction tool 7 . This is close to the shape of the tip of a spoon. A hooking groove 73 is formed at the tip of the hooking portion 71, and a circular hole large enough to allow the handle portion 81 of the reamer 8 to pass through at the rear end of the hooking portion 71. A hooking hole 74 is formed by connecting a narrow elongated hole that does not allow the handle portion 81 to pass therethrough.
The handle 70 contains a melody IC circuit 75, a bone conduction speaker 76 connected thereto, and a dry battery 77 for supplying power to them. A bone conduction speaker 76 is connected to the hook portion 71 . A switch 78 for operating a melody IC circuit 75 is provided outside the handle 70 . The state of these wirings becomes clear from FIG. When the switch 78 is turned on, the electric power of the dry cell 77 causes the melody IC circuit 75 to generate a predetermined melody signal to operate the bone conduction speaker 76 . Since the melody vibration of the bone conduction speaker 76 is transmitted to the hooking portion 71, the hooking portion 71 is brought into contact with the patient's tooth to be extracted and the adjacent tooth for obtaining the fulcrum of the lever. When set to , the melody vibration is further transmitted through the jawbone and directly stimulates the auditory nerve. This is heard as a melody for the patient, and this removes or reduces anxiety about tooth extraction. Although the melody IC circuit 75 generates a predetermined melody signal, a plurality of types of melodies may be made selectable so that the dentist may allow the patient to select a melody.

This invention has made it possible to reduce the burden on the patient during tooth extraction and to make the dentist's work easier, thereby making the industrial utility value extremely high. The tooth extraction tool of the present invention can be configured and provided for use by veterinarians. Needless to say, the configuration of the hooking hole of claim 2 may be applied to claims 3 and 4.

1: tooth extraction tool 10: handle 11: hooking part 12: curved part 13: hooking groove 2: tooth extraction tool 20: handle 21: hooking part 22: boat bottom part 23: hooking groove 24: string hole 25: tooth extraction Tool 26: Hooking part 27: Ship bottom 28: Hooking groove 29: Hooking groove 3: Burl 30: Burl handle 31: Connecting shaft 32: Hooking part 33: Locking groove 4: Base 40: Base handle 41: Connection groove 42: contact part 43: curved part 5: tooth extraction tool 50: first handle 51: hooking part 52: hooking groove 53: second handle 54: contact part 55: curved part 56: rotation Shaft 57: Spring 6: Tooth extraction tool 60: Handle 61: Hooking part 62: Ship bottom part 63: Hooking groove 64: Hooking hole 65: Stringing hole 66: Tooth extraction tool 67: Plane mirror 68: Pattern 7: Tooth extraction tool 70 : handle 71: hooking part 72: boat bottom part 73: hooking groove 74: hooking hole 75: melody IC circuit 76: bone conduction speaker 76: power supply 77: dry battery 78: switch 8: reamer 80: screw part 81: handle Part 82: Axle

Claims (7)

A tooth extraction tool for extracting a tooth by hooking an anchor fixed to the tooth and using the principle of leverage, comprising a handle and a generally oval hooking part provided at the tip of the handle. The bottom portion of this hooking portion is curved in the entire circumferential direction, and a hooking groove is provided on the front side of this hooking portion for bifurcating this portion, or the front side of this hooking portion is provided. or a hooking hole is provided on the rear side of this hooking part. A tooth extraction tool for extracting a tooth by the principle of leverage by hooking an anchor fixed to the tooth, comprising a handle, a hook provided at the tip of the handle, and positioned between them. a burl comprising a connecting shaft and an engaging groove provided in the engaging portion for bifurcating this portion;
a base comprising a base handle, an abutting portion for abutting against teeth at the tip of the base handle, and a connecting groove positioned between them for fitting the connecting shaft of the burl;
When the hooking portion is fitted into the connecting groove to connect and integrate the bar and the base to open the handle and the base handle, the contact portion of the base is attached to the contact portion of the base. A tooth extraction tool, characterized in that a notch is provided in the contact part so that the hook part of the crowbar can be accommodated therein, and the bottom part of the contact part is provided in a curved shape. Positive action forceps for tooth extraction for hooking an anchor fixed to a tooth and extracting the tooth by the principle of leverage, wherein the hooking portion at the tip of the first handle is the tip of the second handle. and a bifurcated locking groove is provided in the locking portion, and the first handle and the second handle are connected to the rotation shaft and a spring is attached between the first handle and the second handle on the rear side of the rotating shaft, and the engaging portion has a substantially elliptical shape. In addition, the tooth extraction tool is characterized in that the bottom portion of the contact portion is curved in the entire circumferential direction. The tooth extraction tool according to claim 2, wherein the locking groove is provided on the side of the locking portion. 3. The tooth extraction tool of claim 2, having a mirror on the handle or on the catch. 3. The tooth extraction tool according to claim 2, wherein the handle or the hook is patterned to reassure the patient. A sound generating circuit for generating a sound signal, or an input unit for a sound signal from an external sound generating device, a bone conduction transducer for converting the sound signal into sound vibration, and a drive for the bone conduction transducer. 3. The dental extraction tool of claim 2, comprising a power source for turning them on and a power switch for turning them on and off.

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