JP2023060161A - Vibrating cylinder of reciprocating motion generator for root canal treatment, reciprocating motion generator and cap provided with this vibrating cylinder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a root canal treatment device allowing a dentist to maintain concentration power by reducing fatigue by facilitating work such as cutting a root canal of a tooth and pulling a nerve.

SOLUTION: A cap 7 is formed by opening an insertion hole 72 at a central part of a contact part 70, the bottom part of a threaded part with a thread 71 engraved. A width of a knob part 40 of a hand file 4 with a thick handle and a width of the contact part 70 of the cap 7 are substantially equal, so that even when the insertion hole 72 is opened at the central part of the contact part 70, the hand file 4 is fixed inside a vibration cylinder 63, while being pressed by the contact part 70. A hand file 8 with a thin handle is fixed inside the vibration cylinder 63, while a knob part 80 is fitted to the insertion hole 72 of the contact part 70 of the cap 7.

SELECTED DRAWING: Figure 11

COPYRIGHT: (C)2023,JPO&INPIT

Description

The present invention provides a vibrating cylinder of an electric reciprocating motion generating tool for electrically generating a reciprocating motion in a file to cleanly treat a decayed tooth, a reciprocating motion generating tool provided with this vibrating cylinder, It also relates to a cap attached to the vibrating cylinder. The file referred to in the present invention is a term that includes a file for filing and a reamer for reaming, but the present invention includes therapeutic tools similar to these. It also relates to dental tools for reciprocating a plugger or similar rod to apply pressure to a tooth filling.

2. Description of the Related Art Dentists generally use a cutting tool called a file when treating a patient's root canal or the like. A file includes a file and a reamer, and the file is named from filing (vertical movement), and the reamer is named from reaming (twisting). These items are color-coded according to their purpose and size, and have symbols and numbers printed on them. Also, what is handled by hand is called a hand file. Also, the thickness of the handle is different. A root canal length measuring instrument is often used in combination with such root canal treatment. In addition, the treatment to prevent reinfection by filling the cavity of the decayed tooth after removing the nerve with a root canal filling material such as floss with wax or gutter perture is called root canal filling. The article on the Internet site of Non-Patent Document 1 is easy to understand about the treatment method for the nerve of the tooth as described above. Regarding root canal filling treatment, the article on the Internet site of Non-Patent Document 2 is easy to understand.

The inventor has developed Japanese Patent Application No. 2018-558447 as an electric reciprocating motion generator as described above. This device consists of a housing, a reciprocating motion generator housed in the housing, and a file attachment/detachment section provided in this reciprocating motion generator. is eliminated and this operation is performed automatically. When a file is attached to the detachable portion, the needle portion of the file protrudes from the tip portion of the reciprocating motion generating portion and reciprocates. This development has made it easier to enlarge and clean the root canal of the tooth and remove the nerve, reducing the dentist's fatigue and achieving the effect of maintaining concentration. be.

Patent application 2018-558447 Internet WWW site <URL: http://mushiba-labo. com/? p=10133> Internet WWW site <URL: http://www. is-dc-m. net/pages/root. html>

For example, when attaching a file to Japanese Patent Application No. 2018-558447, it is good to use the file attached to the reciprocating motion generating part exclusively for this reciprocating motion generating part. I feel that it is easier to use because I am used to wearing it.

By the way, although it is an excellent electric reciprocating motion generating device as described above, it is difficult to open the patient's mouth during treatment, the shape of the mouth at that time, the posture of the doctor, the position of the carious tooth, and other special circumstances. Therefore, if the length of the needle part of the file protruding from the tip of the reciprocating motion generating part is shorter, it will be easier to handle in the patient's oral cavity and to deal with a root canal with a difficult angle. I have as much as I want. This also applies to other dental treatments such as root canal filling.

Alternatively, from another point of view of ease of use, if one electric reciprocating motion generator can use files with two different handle thicknesses, the file options can be expanded. Even if there are two types of files with handle thicknesses that are familiar to doctors, they can be handled.

If these problems could be solved, the dentist's job would be easier and less tiring. Therefore, the object of the present invention is to solve the above-mentioned problems, and as a first object, the electric reciprocating motion generator can shorten the length of the needle part of the file according to the treatment situation. The second object is to make it possible for the electric reciprocating motion generating tool to use files with two types of handle thicknesses according to the treatment situation.

The first problem above is that the vibrating barrel has a mounting portion for the shaft of the file, and has needle holes for the file needle on both sides of the vibrating barrel in the reciprocating direction of the file. It is configured so that it can be attached to the attachment part by changing its orientation, and is configured so that the needle passing hole on one side and the needle passing hole on the other side have different lengths of needles protruding from the needle passing holes. This is achieved by using a vibrating cylinder of a reciprocating motion generator for root canal treatment.

Until now, as described above, the needle of the file has been projected only from the tip of the reciprocating motion generator. On the other hand, in the present invention, if the tip of the reciprocating motion generating portion is set to one side, the needle of the file can be projected from the rear end of the reciprocating motion generating portion as the other side. . This allows the doctor to select which side the needle should face when attaching the file to the attaching part.

Moreover, since the needle passing hole on one side and the needle passing hole on the other side are constructed so that the length of the needle protruding from the needle passing hole is different, the length of the needle necessary for the treatment to be performed from now on can be minimized. can be selected. For example, normally, the file is attached to the attachment part so that the needle protrudes from the tip of the reciprocating movement generating part, but if a situation arises where handling is easier if the needle is shorter, this time is reattached with the needle pointing in the opposite direction, toward the rear end. Therefore, in this case, the length of the needle passing hole on the rear end side should be designed to be longer than the length of the needle passing hole on the front end side. As a result, not only the file dedicated to the present invention, but also the commercially available file can be used as two files by changing the needle length to two types.

By the way, regarding the attachment of the file to the attachment portion, it can be constructed such that the shaft portion of the file is attached to the attachment portion through the attachment opening opened in the side surface of the vibrating barrel. When attaching the shaft to the attachment opening, first pass the needle of the file through the needle hole on the front end side of the vibration cylinder, or pass it through the needle hole on the rear end side, and then insert the file shaft. The part is attached to the attachment opening. As for the vibration side housing of the electric reciprocating motion generator, align it with the mounting hole of the vibration cylinder and open the mounting hole for the shaft of the file in the vibration side housing. need to leave

With this configuration, the file can be easily attached by pushing the shaft of the file through the attachment opening into the vibrating barrel. do it. Therefore, it is easy and convenient to attach and detach the file from the side wall of the vibrating cylinder.

Furthermore, the length of the needle passing hole on the front end side of the vibrating cylinder and the needle passing hole on the rear end side of the vibrating barrel are different, so that the length of the needle coming out from the needle passing hole is reduced. The length is different between the front end side and the rear end side. Therefore, after the needle of the file is passed through one of the needle threading holes so as to obtain the desired needle length, the shaft portion of the file is attached to the attachment opening. That is, the needle length on the other side can be made shorter than the needle length on the one side simply by changing the direction of the needle and attaching it.

Next, as for the attachment of the file to the attachment part, there is a needle through hole on one side of the vibration cylinder and an attachment opening for the shaft of the file on the other side, and the file is fixed to this attachment opening. A cap is detachably attached to the needle, and the cap may have a needle insertion hole on the other side. What is noteworthy about this configuration is that the cap has a needle hole on the other side. In addition, it is necessary to make the length of the needle through hole different from that of the other side so that the length of the needle coming out from the needle through hole is different. be.

By constructing in this manner, the needle length on the other side can be easily made shorter than the needle length on the one side simply by changing the direction of the needle of the file, attaching it, and fixing it with the cap. of.

In this case, the cap has a needle through hole on the other side, and the cap is configured to be attached to the mounting opening of the mounting portion. It does not have to be something that can be called a cap. For example, the mounting part is divided into a front side and a rear side, which can be detachably attached to each other with screws, and the lengths of the front side mounting part and the rear side mounting part are different so that the length of the needle passing hole is different. For example, a different needle passing hole may be provided.

Next, the second problem above is that the vibrating barrel has a mounting portion for the shaft portion of the file, the needle passing hole is on one side of the vibrating barrel, and the mounting port for the shaft portion of the file is on the other side. A cap for fixing a file is detachably attached to the mounting opening, and the bottom of the screwed portion of the cap is a contact portion with a width of approximately the handle of a file with a thick handle. In addition, this is achieved by providing a vibrating cylinder of a reciprocating motion generator for root canal treatment, which has an insertion hole with a width of the handle of a file with a thin handle in the relevant contact portion.

Until now, only one type of file was attached to the vibrating barrel and the cap, but here two types of files with different handle thicknesses can be attached. For thick handle files, the bottom of the cap will abut the top end of the thick handle. Alternatively, for thin handle files, the insertion hole in the bottom of the cap will receive the thin handle by inserting the thin handle. Regarding the difference in the length of the handle of the file, it is possible to absorb the difference in the length of the handle by adjusting the depth of attachment of the cap to the vibration cylinder. For example, if it is a screw type, the depth of screwing may be adjusted.

By constructing in this way, even if there are two types of files with handle thicknesses familiar to doctors, they can be easily and easily dealt with by making it possible to replace them with caps. If, in the future, files with different pattern thicknesses will become the standard, it will suffice to provide several types of caps corresponding to the two types of files. It is also possible to set the size of the concentric holes in two or three steps.

According to this invention, it is only necessary to change the direction of the stylus of the file to attach the file to the mounting part. There is an effect that it becomes possible to use two wires properly.

Further, according to the present invention, when exchanging files with handles of two different thicknesses, it is possible to cope with the difference in thickness with the cap.

FIG. 2 is an explanatory diagram schematically showing a part of Example 1 with a cutout; It is an explanatory view schematically showing this circuit portion. It is explanatory drawing which notched and represented typically a part of vibration cylinder 13. FIG. It is explanatory drawing of a usage state. It is explanatory drawing which notched and represented one part of Example 2 typically. It is explanatory drawing of a usage state. FIG. 11 is an explanatory diagram of Example 3; It is explanatory drawing of a usage state. FIG. 11 is an explanatory diagram of Example 4; FIG. 11 is an explanatory view showing the cap 7 of Example 4 from the bottom direction; It is explanatory drawing of a usage state. It is explanatory drawing of a usage state.

Although embodiments of the present invention will be described below with reference to the drawings, the present invention is not limited thereto.

This embodiment will be described with reference to FIGS. 1 to 4. FIG. The reciprocating motion generator 1 is composed of a handle-side housing 10 and a vibration-side housing 11. The vibration-side housing 11 and the handle-side housing 10 form a T shape at the tip of the handle-side housing 10. attached to the A detachable portion 13 of a hand file 4 for treating the inside of a root canal is incorporated in the vibration side housing 11 so as to protrude from an opening 12 so as to be able to reciprocate. A reciprocating motion generator, which will be described later, is for reciprocating the attaching/detaching portion 13 .

An electric geared motor 20 is housed in the chair unit 2 , and power is supplied to an input terminal 22 of the geared motor 20 from a chair unit power supply 24 via a foot switch 23 . A rotating shaft 21 of the geared motor 20 is connected to a rotating shaft 25 inside the handle-side housing 10 .

A pin 26 is provided eccentrically at the tip of the rotating shaft 25 , and this pin 26 is engaged with a pin hole 14 provided on the side surface of the attachment/detachment section 13 . The reciprocating motion generator is configured in this way. The hand file 4 used in this embodiment consists of a knob portion 40 which is an insertion portion and a needle portion 41, and a fine projection 42 is formed around the needle portion 41. As shown in FIG.

The attachment/detachment portion 13 is provided inside the vibration-side housing 11 so as to be able to vibrate in the front-rear direction (vertical direction in FIG. 1). A guide pin 17 protruding from the side surface of the attaching/detaching portion 13 is inserted into a guide groove 18 provided inside the vibration side housing 11 in the front-rear direction, that is, in the direction in which the hand file 4 reciprocates.

A mounting opening 16 is opened at the rear end of the attaching/detaching portion 13, and when the hand file 4 is attached from here, the needle portion 31 is opened in the attaching/detaching portion 13 (as a needle passing hole on one side). 2), it can be pushed in until it comes out of the needle passage hole 15 and the tip of the knob 40 comes into contact with the inner side of the needle passage hole 15. As shown in FIG.

The hand file 4 can be fixed by screwing the cap 3 as fixing means into the mounting opening 16 . Therefore, the replacement of the hand file 4 is performed by attaching and detaching the cap 3 . In particular, the cap 3 has a needle through hole 30 (as a needle through hole on the other side). The depth of the needle threading hole 30 is designed to be longer than the depth of the needle threading hole 15 of the attaching/detaching portion 13 . Note that the fixing means need not be of a screw type.

Since the pin 26 of the rotating shaft 25 is laterally fitted into the pin hole 14 of the side wall of the attaching/detaching portion 13, as is clear from FIG. Another feature is that it does not substantially rotate around the needle portion 41 of the hand file 4 just by rotating it. However, in consideration of the case where relatively large rotational vibration is not desirable, the configuration of the guide pin 17 and the guide groove 18 as described above is provided. An arrow S indicates the direction of the stroke.

As for the usage of this embodiment, as shown in FIG. The hand file 4 is fixed by screwing the cap 3 into the mounting opening 16.例文帳に追加In this way, the reciprocating motion generator 1 is ready for use in root canal treatment.

If there is no problem with the reciprocating motion generator 1 in this state, it can be used as it is. On the other hand, if a situation arises in which the length of the needle portion 41 should be shorter, the following measures can be taken only by the reciprocating motion generator 1 of this embodiment. be. That is, the cap 3 is removed from the mounting opening 16, and the hand file 4 is temporarily taken out. Subsequently, the posture of the hand file 4 is reversed by 180 degrees and inserted into the mounting opening 16 from the knob portion 40 side. As a result, the needle portion 41 is directed rearward from the mounting opening 16 . Then, when the needle portion 41 is passed through the needle passing hole 30 provided in the cap 3 and the cap 3 is screwed into the mounting opening 16, the hand file 4 is fixed and the needle portion 41 passes through the needle passing hole 30. protrudes out of the cap 3 from (FIG. 4).

Although both FIGS. 1 and 4 are schematic diagrams, it can be seen from these figures that the length of the needle portion 41 protruding from the needle insertion hole 15 of the detachable portion 13 of the needle portion 41 is larger than that of the needle portion of the cap 3 . It can be clearly seen that the length of the part protruding from the through hole 30 is shorter.

Next, the reciprocating motion generator 5 of this embodiment, which will be described with reference to FIGS. That is, an opening 52 is opened at the tip of the vibration-side casing 51, and a detachable portion 53 as a vibration cylinder is attached thereto. The attachment/detachment portion 53 is located inside the vibration-side housing 51 and is provided so as to be able to vibrate in the front-rear direction (vertical direction in FIG. 5). Further, the pin 26 described in the first embodiment is fitted into the pin hole 54 provided at the rear end of the vibrating cylinder 53 . A guide pin 58 protruding from the rear end portion of the vibrating cylinder 53 is inserted into a guide groove 59 provided inside the vibrating housing 51 in the front-rear direction (vertical direction in FIG. 5). At the front end of the vibrating cylinder 53, a needle threading hole 55 for passing the needle portion 41 of the hand file 4 is formed.

A mounting opening 56 for the hand file 4 is opened in the side wall of the vibration cylinder 53, and a mounting opening (not shown) is also opened in the side wall of the vibration side housing 51 in accordance with the position of the mounting opening 56. It is A receiving rubber 57 for the knob 40 of the hand file 4 is attached to the inner wall of the vibrating cylinder 53 . At the rear end of the vibrating cylinder 53, a needle threading hole 500 for passing the needle portion 41 of the hand file 4 is formed.

The needle threading hole 55 and the needle threading hole 500 have different depths. It is designed to be shorter than the depth of the needle threading hole 500 .

As for the usage of this embodiment, as shown in FIG. Then, the knob portion 40 is firmly fixed by the receiving rubber 57 . Next, the hand file 4 is once removed from the mounting opening 56 by pinching the knob 40 in the mounting opening 56 with the fingertips. Subsequently, the posture of the hand file 4 is reversed 180 degrees, and the knob 40 is pushed into the mounting opening 56 while passing the needle 41 through the needle through hole 500 . As a result, the knob portion 40 is firmly fixed by the receiving rubber 57 . The hour hand portion 41 protrudes outward from a needle through hole 500 on the rear end side of the vibrating cylinder 53 as shown in FIG.

5 and 6 are both schematic diagrams, it can be seen from these diagrams that compared to the length of the needle portion 41 protruding from the needle insertion hole 55 on the distal end side of the vibrating cylinder 53, It can be seen at a glance that the length of the needle portion 41 protruding from the needle insertion hole 500 on the rear end side is shorter.

Next, a reciprocating motion generator 6, which will be described with reference to FIGS. It does not have a configuration by Instead, the reciprocating motion generator 6 is characterized in that a pin hole 64 for inserting the pin 26 is formed in the outer peripheral portion of the vibrating cylinder 63 over 360 degrees. However, although it is said to be 360 degrees, a stopper 67 is provided in a part of the pin hole 64 . The rotating shaft of the motor (not shown) is connected to the rotating shaft through a geared box. A pin 26 is provided on this rotating shaft. 64 can be moved freely. That is, conversely, until the pin 26 comes into contact with the stopper 67, the vibration cylinder 63 is rotatable inside the vibration side housing 61. As shown in FIG.

An opening 62 is opened at the tip of the vibration-side casing 61 of the reciprocating motion generator 6, and the above-described vibration cylinder 63 is mounted therein. The vibrating cylinder 63 is provided inside the vibrating side housing 61 so as to vibrate in the front-rear direction (vertical direction in FIG. 7). A file mounting opening 66 is opened at the rear end of the vibrating cylinder 63, and when the file 4 is mounted from here, the needle portion 41 of the file passes through one side (front end side) of the vibrating cylinder 63. It is constructed so that it can be pushed in until it comes out of the hole 65 and the tip of the knob 40 comes into contact with the inner side of the needle insertion hole 65 . The file 4 can be fixed by screwing the cap 3 into the attachment opening 66 . Therefore, the file 4 is exchanged by attaching and detaching the cap 3 . In particular, the cap 3 has a needle through hole 30 (as a needle through hole on the other side). The depth of the needle through hole 30 is set longer than the depth of the needle through hole 65 of the vibration cylinder 63 . Note that the fixing means need not be of a screw type.

The reciprocating motion generator 6 of this embodiment has been developed to reciprocate the flexible needle 41 of the hand file 4 . This is because the shape of the curved root canal differs from patient to patient and from tooth to tooth even in the same patient. In such a case, it may be difficult to pull out the needle 41, and the needle 41 may be bent or damaged. be.

As a result of diligent research and development, it was found that it would be even better if the vibrating cylinder 63 was freely rotated. This free rotation does not mean forced rotation or rotation by driving force, but rather the ability to move freely in either the left or right direction without resisting external force without being fixed. . With this configuration, even if there is resistance to the reciprocating motion of the hand file 4, or even if the root canal is about to be bitten, it can be avoided, and the needle 41 can be twisted or twisted. It became possible to continue reciprocating motion smoothly without bending. FIG. 8 is a schematic diagram showing its operating state. Since pins 26 of approximately the same diameter are inserted into the pin holes 64, when the pins 26 connected to the rotating shaft of the motor in an eccentric state rotate ( FIG. 8 shows the moment when the pin 26 moves from the position indicated by the dashed line to the position indicated by the solid line). . On the other hand, since the pin holes 64 are formed on the outer periphery of the vibrating cylinder 63 over 360 degrees, the vibrating cylinder 63 can freely rotate in the direction of the arrow. This is exactly what makes the needle of the reamer difficult to twist. The action of the stopper 67 will be described later.

The pin hole 64 and pin 26 of this embodiment have important effects as described above. Furthermore, due to the synergistic effect of the smoothly repeated reciprocating motion and the flexibly bending property of the needle 41 of the hand file 4, there are many moments when the root canal is conveniently entered into the root canal even at a curved part. I have visited many times, and as a result, I was able to finish the treatment of caries in a short time. In addition, when free rotation became possible, a phenomenon was also observed in which the robot entered while avoiding the stuffing, and conversely retreated while winding the stuffing and took out the old stuffing.

By the way, the pin 26 on the rotating shaft side of the motor is engaged with a pin hole 64, and this pin hole 64 is engraved on the outer peripheral portion of the vibrating cylinder 63 over 360 degrees. The reason for this configuration will be described later, but when the hand file 4 is inserted into the vibrating cylinder 63 from the rear side and the cap 3 is screwed into the mounting opening 66, the vibrating cylinder 63 will move against the vibration side housing 61. It is difficult to tighten the cap 3 because the cap 3 rotates freely over 360 degrees. However, since the stopper 67 is provided in the pin hole 64, it is possible to prevent the vibration cylinder 63 from rotating beyond 360 degrees, and the cap 3 can be securely tightened.

As a result, the length of the part protruding from the needle passing hole 30 of the cap 3 is longer than the length of the protruding part from the needle passing hole 65 of the detachable portion 63 of the needle portion 41. It will be shorter.

9 to 12, the cap 7 of this embodiment has an insertion hole 72 at the center of the abutting portion 70, which is the bottom portion of the screw-in portion on which a screw thread 71 is formed. It is screwed into the mounting opening 66 of the vibrating cylinder 63 of the reciprocating motion generator 6 described above.

The reciprocating motion generator 6 can use two types of hand file 4 and hand file 8 properly by having this cap 7 . FIG. 11 is an explanatory diagram when using the hand file 4, and FIG. 12 is an explanatory diagram when using the hand file 8. As shown in FIG. First, when using the hand file 4, the grip portion 40, which is the handle, is gripped by hand, and the needle portion 41 is passed through the needle passing hole 65 from the mounting opening 66 of the vibration cylinder 63. The cap 7 is screwed into the 66. At this time, since the width of the knob portion 40 of the thick-handled hand file 4 and the width of the contact portion 70 of the cap 7 are substantially equal, the hand file 4 has an insertion hole 72 at the center of the contact portion 70. However, it is fixed in the vibrating cylinder 63 while being pressed by the contact portion 70 .

Next, when using the hand file 8, the hand file 4 is removed by first twisting the cap 7 in the loosening direction. Subsequently, the grip portion 80 of the hand file 8 is gripped by hand, and after the needle portion 41 is inserted from the mounting opening 66 of the vibration cylinder 63 into the needle passing hole 65, the grip portion 80 of the hand file 8 is attached to the cap 7. The cap 7 is screwed deeply into the mounting opening 66 so that it can be mounted in the insertion hole 72 of the contact portion 70 of the cap 7 and fixed in the vibrating cylinder 63 . The hand file 8 is composed of an elongated knob portion 80 and a needle portion 81, which are insertion portions, and fine projections 82 around the needle portion 81. As shown in FIG.

According to this invention, the electric reciprocating motion generator can shorten the length of the needle part of the file according to the treatment situation. Alternatively, the electric reciprocating motion generator can use two types of files (two types of files with different handle thicknesses) that are different in usability depending on the treatment situation. As a result, the dentist's work becomes easier and less fatigued, and the industrial utility value of this invention is extremely high.

This invention has potential applications in the field of veterinary medicine. It should be noted that it is important that the cap having a needle through hole of the present invention, whether it is a screw type or not, has a needle through hole for a file, and the conventional electric Since it can be applied to a reciprocating motion generator, it can be said that the cap alone has a very large industrial utility value. Alternatively, since the cap having the insertion hole of the present invention can be applied to a conventional electric reciprocating motion generator, it can be said that the cap alone has an extremely large industrial utility value.

1: Reciprocating Motion Generating Tool 10: Handle Side Housing 11: Vibration Side Housing 12: Opening 13: Detachable Part 14: Pin Hole 15: Needle Passing Hole 16: Mounting Port 17: Guide Pin 18: Guide Groove 2: Chair Unit 20: Geared motor 21: Rotating shaft 22: Input terminal 23: Foot switch 24: Chair unit power supply 25: Rotating shaft 26: Pin 3: Cap 30: Needle hole 4: Hand file 40: Knob 41: Needle 42 : Protrusion 5 : Reciprocating Motion Generating Tool 51 : Vibration Side Housing 52 : Opening 53 : Detachable Section 54 : Pin Hole 55 : Needle Passing Hole 56 : Mounting Port 57 : Receiving Rubber 58 : Guide Pin 59 : Guide Groove 500 : Needle Through hole 6: Reciprocating motion generator 61: Vibration side housing 62: Opening 63: Vibration cylinder 64: Pin hole 65: Needle through hole 66: Mounting port 67: Stopper 7: Cap 70: Contact part 71: Thread 72: Insertion hole 8: Hand file 80: Knob part 81: Needle part 82: Protrusion

Claims (4)

The vibrating barrel has a mounting portion for the shaft portion of the file, the needle passing hole is provided on one side of the vibrating barrel, and the mounting opening for the shaft portion of the file is opened on the other side, and the file is fixed. A cap for holding is detachably attached to the mounting opening, and the bottom of the threaded portion of the cap is a contact portion with a width of approximately the handle of a file with a thick handle, and a file with a thin handle is attached to the contact portion. A vibrating cylinder of a reciprocating motion generator for root canal treatment, having an insertion hole with a width of a handle. A reciprocating motion generator for root canal treatment, comprising the vibrating cylinder according to claim 1 . The reciprocating motion generator for root canal treatment according to claim 2, comprising the file. 2. The cap according to claim 1, which has a contact portion with a thick handle and an insertion hole with a thin handle.

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