KR101261408B1 - Root canal filling apparatus detachable plunger - Google Patents

Abstract

PURPOSE: A root canal filler with a separable plunger is provided to safely and continuously supply an endodontic sealer without damage to the skin or the face of a surgical operator or a person who gets the operation. CONSTITUTION: A root canal filler with a separable plunger includes a body(100) with a separable cover which is composed of a checking window and with a cap which is fixedly clamped to the fore-end opened by the connection with the cover; an actuator(200) including a guide which is installed inside the body in a longitudinal direction and a separable plunger which moves in the longitudinal direction according to the guidance of the guide, and is installed inside the body in order to move the plunger; a heater which is installed on the guide for one end to be positioned on a coaxial line of the plunger simultaneously with a central axis line of the cap being faced; a protection element(400) which forms an air layer in between the heater and the protection element; and a needle unit(500) which is detachable by being rotated at a predetermined angle.

Description

Root canal charger with separate plunger {ROOT CANAL FILLING APPARATUS DETACHABLE PLUNGER}

The present invention relates to a root canal charger equipped with a separate plunger, and more particularly, to form an air layer between the heater dissolving the filler and the root canal charger body to prevent heat generated from the heater from being transferred directly to the body. The plunger moving in the longitudinal direction by the actuator can be configured as a separate type so that it can be easily disinfected and cleaned by contacting with the filling material to remove the minimal part that may be contaminated. Thus, the needle part is repeatedly prevented from being blocked by the needle. It relates to a root canal charger that can be used.

In general, root canal treatment refers to the removal of the root canal disease by removing and then disinfecting the root canal contents of the damaged tooth from the tooth with the damaged pulp or root apical tissue.

This root canal treatment removes the root canal contents and then fills with invariant materials (fillers) to prevent re-infection of the root canal so that the tooth can function normally in the oral cavity.

At this time, the root canal charger is used to charge the filler. Patent Document 1 discloses such a root canal charger. Conventional root canal charger, the handle portion is equipped with a trigger, a dental device is placed on top of the handle portion is equipped with a filling and softening the filling, and a plunger portion for discharging the filling softened by the operation of the trigger In the root canal filling device, a temperature control part is built in the handle part, and a power connection terminal for applying power to the temperature control part is formed on the lower surface of the handle part and extends downward on both sides of the power connection terminal. A guide groove extending in a direction facing each other is formed, and the guide groove is characterized in that the battery unit is built with a conventional rechargeable battery.

However, the conventional root canal charger has the following problems.

1) In order to melt it according to the type of filler, the heating tip with filler should be heated at about 60 ~ 200 ℃. At this time, the heat generated is transferred to the main body to act as a factor to hurt the operator or the skin of the subject.

2) Particularly, since the conventional root canal charger has a structure in which the heating tip and the main body directly contact each other, heat generated from the heating tip is directly transferred to the main body, thereby acting as a factor for further accelerating skin damage.

3) Because there was no way to determine how much the filler was consumed, the operator had to insert the filler into the root canal charger during the procedure. This not only degrades the continuity of filling but also causes the filler not to be uniformly filled.

4) The root canal charger was inconvenient to use because it consists of Gun type. In other words, the filling direction of the filler is changed depending on the state or position of the tooth, in the case of the gun type root canal charger, it was difficult to change the direction by holding the handle portion.

5) The silicon ball, which is used to prevent contamination due to direct contact between the filler and the drive shaft, remains inside the charging chamber after exhausting the filler in the charging chamber.

6) To use the needle part again, you need to disinfect and clean it by removing the needle part from the cap, but there is a problem that the cleaning and disinfection cannot be performed even if foreign matter gets stuck between the silicon ball remaining in the charging chamber and the inside. .

7) Since the silicon ball remaining in the charging chamber is difficult to be pulled out again, the needle part cannot be used again and should be discarded.

8) If the end of the plunger is filled with filler or needs to be disinfected and cleaned due to contamination, the plunger should be separated from the root canal charger. Since the plunger is directly connected to the actuator, it is almost impossible to separate the plunger only.

Korea Patent Registration No. 10-0614628 (Aug. 14, 2006)

The present invention has been made in view of this point, by forming an air layer between the heater and the body provided for the body to generate heat, heat is transferred through this air layer to make it possible to confirm the consumption of the filler, And a root canal charger equipped with a detachable plunger that can safely and continuously supply fillers without injuring the operator's or subject's skin or face due to the heat generated from a high temperature heater. The purpose is to provide.

In addition, the present invention is to separate the pull plunger to pressurize the filler to the plunger body and the pressure bar and to form a detachable type so that they can be easily removable through the uneven coupling, when separating the needle portion from the cap to fill the filler again, By configuring only the pressure bar to be pulled out together with the needle part, it is possible to separate and use only the minimum part (pressure bar) that needs to be disinfected or cleaned in contact with the actual filler, and also prevents the needle from clogging. Its purpose is to provide a plunger for root canal chargers that allows wealth to be reused.

In addition, the present invention is to make the canal charger in a pen type and to operate by receiving the power of the actuator from a battery type or external, so that the operator can easily perform the procedure while changing the position of the canal charger according to the charging direction Another object of the present invention is to provide a root canal charger equipped with a detachable plunger that enables stable charging in a comfortable posture.

Root canal charger equipped with a detachable plunger according to the present invention for achieving this purpose, the cover provided with a confirmation window so that you can see the transport position of the plunger is detachable and coupled, screwed to the open end coupled with the cover A body having a cap fastened to it; An actuator installed inside the body, the guide being installed in the longitudinal direction and a separate plunger that is guided by the guide and moved in the longitudinal direction within the body, the actuator being installed in the body to operate the plunger; A heater installed in the guide such that one end thereof is positioned coaxially with the plunger while facing the center axis of the cap; A protection member mounted to a guide to be positioned inside the cap to form an air layer between the heater; And a needle part inserted into the heater through the protection member so that the filler can be pressurized by the plunger, and a needle part detachably mounted by rotating the protection member by a predetermined angle. Is made of a plunger body and a pressure bar formed with a first detachable opening and a second detachable opening at one end so as to extend or extend in the longitudinal direction, respectively, the rear end of the plunger body connected to the actuator for root canal charger The connector is formed so as to be movable in the longitudinal direction, the outer peripheral surface is formed with at least one groove for preventing rotation; The pressing bar is characterized in that the packing is fitted to the end by fastening with a fixing screw to form a fixed mounting portion.

In particular, the body is characterized in that it is formed in a pen type.

In addition, the actuator is characterized in that for receiving the necessary power through the external power line from the battery or the outside stored in the body.

The pressing bar is longer than the length of the filling chamber into which the filling material is inserted.

In addition, the first release port is made of a groove, the second release port is characterized in that it is made of a convex shape that can be accommodated in the groove.

In addition, the connector is a female screw, the actuator is characterized in that the stationary motor having a drive shaft screwed with the female screw.

In addition, the packing is characterized in that consisting of two stages of fluorocarbon resin (teflon) and PEEK (polyetheretherketone).

Finally, the needle portion is closed to the cap and a lower surface is formed with a plurality of flanges protruding a plurality of fixing projections at predetermined intervals; the fixing member is fitted to these fixing projections so that the flange is not separated from the cap The note is characterized in that a fixing hole having a "+"-shaped groove is further formed.

According to the root canal charger equipped with a separate plunger of the present invention has the following effects.

1) By allowing the heat generated from the heater to pass through the air layer instead of being transferred directly to the body, it is possible to prevent skin damage that may occur due to high temperature heat coming into contact with the skin or face.

2) By confirming the consumption of the filler in the root canal charger, it is possible to easily check the re-supply timing of the filler during the procedure as well as to minimize the inconvenience of having to reinsert the filler during the charging, thereby enabling continuous charging.

3) By making the canal charger in pen type, it can be grasped while changing the position of the operator. This can be used in a comfortable position to fit the position of the root canal charger depending on the location of the tooth or the filling position.

4) By rotating the needle portion by a predetermined angle to be easily detachable from the root canal charger, it is possible to easily and quickly refill the filler.

5) When the filling material inside the filling chamber is exhausted and the needle part is pulled out of the cap, the pressure bar comes out in the state of being fitted into the filling room, and when the pressure bar is pulled out, it is immediately pulled out of the filling room. The bar can be cleaned easily.

6) In particular, since it is possible to clean the inside of the charging chamber by separating the pressure bar, it is possible to easily remove the residues inside, so that the needle part can be used immediately after disinfection and cleaning.

7) It is effective and hygienic because it can be cleaned and disinfected by removing only the pressure bar inside the filling room that may be contaminated or the filling material.

1 is a perspective view showing a root canal charger according to a first embodiment of the present invention.
2 is an exploded perspective view showing a part of the root canal charger in accordance with a first embodiment of the present invention to show a configuration.
3 is a cross-sectional view showing the internal configuration of the root canal charger according to the first embodiment of the present invention.
Figure 4 is an exploded perspective view showing the removable plunger structure according to the first embodiment of the present invention.
5 and 6 are cross-sectional views for showing the operating state before and after pressing the plunger according to the present invention.
7 is a cross-sectional view showing a process of separating the plunger from the needle portion according to the present invention.
FIG. 8 is a perspective view showing a root canal charger according to a second embodiment of the present invention; FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents It should be understood that water and variations may be present.

(Embodiment 1)

1 is a perspective view showing a root canal charger according to a first embodiment of the present invention, Figure 2 is an exploded perspective view partly disassembled to show the configuration of the root canal charger according to a first embodiment of the present invention. 3 is a cross-sectional view showing the internal configuration of the root canal charger according to the first embodiment of the present invention.

The root canal charger F according to the first embodiment of the present invention includes an actuator 200 providing a driving force for pressurizing the hollow body 100 and the filler 511 with an empty inside, and the filler 511. A heater 300 for melting, a protection member 400 for forming the air layer 410 between the heater 300 and a needle portion 500 for ejecting the filler 511.

In particular, the root canal charger (F) according to the first embodiment of the present invention is that the heat generated from the heater 300 by the air layer 410 directly contact the skin or face of the operator or the subject through the body 100, etc. This prevents injuries such as burns in advance.

In addition, the actuator 200 includes a separate plunger 210, which can minimize contamination of the plunger 210 due to contact with the filler 511, and also facilitates cleaning and the like. It is to be maintained.

Hereinafter, this configuration will be described in more detail as follows.

Body 100 is composed of an upper body (100a) and a lower body (100b), in particular the upper body (100a) is separated by a cover 110 to be separated and assembled from side to side. In addition, the body 100 is preferably made in the form of a pen, so that the operator can easily change to the desired filling position by easily rotating the body 100 by hand in any direction. .

In addition, the upper body (100a) is formed in a tubular shape, one side thereof is provided with a cover 110 to be removable in a one-touch type. In addition, the cover 110 is formed with a confirmation window 111 so that the inside of the body 100 can be seen. At this time, the confirmation window 111 is the amount of operation of the actuator 200 to be described later, that is, the plunger 210 presses the filler 511 by the operation of the actuator 200, the transfer distance of the plunger 210 It is desirable to be able to visually check the exhaustion state of the filler 511 to be able to see.

And, the upper body (100a) is provided with a cap 120 on the top. Cap 120 is mounted in a screw fastening method on the upper end portion 100a and the cover 110 is coupled, and serves to close the top. In addition, a mounting hole 121 is formed in the upper surface of the cap 120 so that the needle portion 500 can be inserted in the center thereof.

The lower body 100b is formed in a container shape having a long depth, and is detachably attached to the lower body in which the upper body 100a and the cover 110 are coupled by a screwing method. In addition, the lower body 100b is used as a space for accommodating the battery 220, and an electric circuit for supplying power or controlling the battery 220 and the actuator 200 may be further configured. The construction of such an electric circuit is made by a conventional technique, and it can be used at the bottom of the upper body 100a.

The actuator 200 is a component for pressurizing the filler 511 inserted into the needle part 500, and preferably, a driving motor may be used.

In particular, the actuator 200 is mounted with a plunger 210 for screwing substantially the filler 511 against the drive shaft. The plunger 210 converts the rotational movement of the actuator 200 into a straight line to pressurize the filler 511. In addition, it is preferable to form a mark (not shown) on the surface of the plunger 210 so as to know the maximum and minimum travel length, the mark at this time so that it can be seen from the outside through the above-described confirmation window 111. It is desirable to enable the operator to visually check the consumption state of the filler 511 at any time.

The actuator 200 formed as described above is installed inside the body 100, wherein the plunger 210 is installed on the central axis of the body 100. In the drawing, the actuator 200 is mounted on the lower portion of the upper body 100a so as not to fall down, and shows an example configured to receive power from the battery 220 embedded in the lower body 100b.

On the other hand, the upper body (100a) has a guide 200b therein. The guide 200b is for guiding the plunger 210 to move in the longitudinal direction without stably rotating. The guide 200b is installed to be positioned on the central axis of the upper body 100a, and the end thereof is formed to be positioned below the cap 120. At this time, the length of the guide (200b) is to ensure a space for installing the heater 300 between the end and the cap 120.

On the other hand, the actuator 200, as shown in Figures 4 to 7, is provided with a separate type plunger 210. Figure 4 is an exploded perspective view to show a removable plunger structure according to a first embodiment of the present invention, Figures 5 and 6 are cross-sectional views for showing the operating state before and after pressing the plunger according to the present invention, Figure 7 Is a cross-sectional view showing a process of separating the plunger from the needle portion according to the present invention.

The separate plunger 210 is a plunger body 210a which is screwed to the drive shaft 200a of the actuator 200 in a screwed manner, and is pressurized to unevenly couple the plunger body 210a to pressurize the filler 511 substantially. It comprises a bar 210b.

The plunger body 210a is a kind of rod member having a predetermined length, and one end of the plunger body 210a is formed to allow the pressure bar 210b to extend in the longitudinal direction. Here, the first detachable opening 211 may be manufactured in the form of a groove or an iron groove, but the drawing shows an example of the production in the form of a groove.

In addition, the cross-sectional shape of the plunger body 210a may also be manufactured in various forms, but it is preferable to manufacture a rod-shaped rod having a circular cross section so as to minimize frictional resistance when moving in the longitudinal direction.

In addition, the connector 213 is formed at the other end of the plunger body 210a to be coupled to the drive shaft 200a of the actuator 200. At this time, since the actuator 200 uses a large number of forward and reverse motors to rotate in the forward and reverse directions, the connector 213 is operated by the drive shaft 200a and has a structure that can move the plunger body 210a in the longitudinal direction. Form. Thus, in a preferred embodiment of the present invention, the connector 213 is formed in the form of a female screw so that the plunger body 210a can be moved in the longitudinal direction by the rotation operation of the drive shaft 200a, and the drive shaft 200a is formed on the female screw portion. It is preferable to form a male screw on this outer circumferential surface to enable mutual fastening.

At least one groove 214 for preventing rotation is formed on the outer circumferential surface of the plunger body 210a so that the plunger body 210a does not rotate together even when the drive shaft 200a rotates. In the preferred embodiment of the present invention, the groove 214 is preferably formed over the entire length to prevent rotation to match the length because the plunger body (210a) moves in the longitudinal direction. In the figure, an example in which two grooves 214 are formed at equal intervals is shown. The groove 214 formed as described above receives the guide 200b provided inside the body 100 of the root canal charger to prevent rotation of the plunger body 210a.

The pressure bar 210b is mounted to the first release port 211 to be coaxial with the plunger body 210a. To this end, at one end of the pressure bar 210b, a second detachment port 212 is formed to be detachable from the first detachment port 211. At this time, the second detachable opening 212 is formed in the form of a convex portion so as to be fitted to the first removable opening 211 of the groove shape by way of example.

In addition, the mounting portion 216 is formed at the other end of the pressure bar 210b. The mounting groove 16 is made of a diameter smaller than the diameter of the pressure bar (210b), the packing 215 is fitted. A fixing screw 216a is fastened in the longitudinal direction to the front end of the mounting groove 16 to firmly fix the packing 215.

Meanwhile, the packing 215 serves to guide the other end of the pressure bar 210b into the filling chamber 510 so that the filling material 511 can be pressurized without leaking when the filling material 511 is pressurized. In the present invention, the packing 215 is used by inserting the fluorine resin 215a (teflon) and PEEK (215b (polyetheretherketone)) into the mounting portion 216. That is, the packing 215 formed of the fluororesin 215a and the PEEK 215b is inserted into the mounting part 216, and then the fixing screw 216a is fastened to the mounting part 216 to fix the packing 215.

In a preferred embodiment of the present invention, the pressure bar 210b is preferably formed longer than the length of the charging chamber 510. When the pressure bar 210b runs out of the filling material 511, the pressure bar 210b may be inserted into the filling chamber 510 and thus may not come out due to the packing 215. When the needle part 500 is removed from the cap 120, the pressure bar 210b is separated from the plunger body 210a in a state of being fitted into the charging chamber 510 as shown in FIG. 7. In this state, if the pressure bar (210b) of contamination may be removed from the needle portion 500 to disinfect and clean, it is possible to continuously use the pressure bar (210b) as well as the needle portion (500). .

The heater 300 is a component for melting the filler 511, and the heater 300 uses a conventional technique that is widely used in this field. In particular, as shown in FIG. 5, the heater 300 is manufactured in a cylindrical shape to surround the outside of the filling chamber 510 in which the filler 511 is inserted, so that the whole melting can be performed.

The heater 300 formed as described above is installed at the tip of the guide 200b. At this time, the heater 300 is installed to be coaxial with the plunger 210 so that the plunger 210 drives the filler 511 by driving the actuator 200. It is desirable to be able to pressurize.

In addition, the heater 300 is preferably manufactured so as not to protrude to the outside of the cap 120 so that the length of the needle portion 500 does not interfere with each other when mounting the protective member 400.

As shown in FIG. 3 or 5, the protection member 400 forms an air layer 410 between the heater 300 to prevent burns due to heat, and the needle 500 may be easily detached. It is a supportive role.

The protection member 400 is formed in a cylindrical shape with an upper surface sealed, and is fixed by being fitted to the tip portion of the guide 200b. At this time, the protection member 400 is preferably formed so that the upper end does not protrude to the outside of the cap 120 to be fixed by the cap 120.

In addition, the protective member 400 is described as having a cylindrical shape, but is not limited thereto. For example, it is also possible to make and use the two-stage stepped form as shown in the drawing in consideration of its own rigidity or installation space.

Finally, the protection member 400 is formed with a fixing hole 420 on the upper surface. In particular, the needle part 500 is inserted into the fixing hole 420, and a groove having a “+” shape is further formed to fix the needle part 500. The fixing hole 420 is formed coaxially with the plunger 210, so that the plunger 210 and the filler 511 are positioned coaxially when the needle part 500 is fixed thereto. desirable.

The needle part 500 includes a filling chamber 510 configured to insert the filler 511 and a flange 520 for mounting the needle part 500 to the protection member 400.

In particular, the flange 520 is in contact with the upper surface of the protection member 400, the fixing projections 521 protruding downward on the bottom surface. The fixing protrusion 521 is a portion to be inserted into the "+"-shaped groove of the fixing hole 420. When the needle part 500 is rotated while holding the cap 120, the fixing protrusion 521 has a groove. The needle part 500 is fixed while returning to the lower fixing hole 420. In a preferred embodiment of the present invention, the needle portion 500 is rotated by an angle smaller than 90 °, it is preferable to be able to prevent the fixing projections 521 protruding to the neighboring "+" groove, In the fixing hole 420, it is preferable that a locking jaw (not shown) is formed on the inner surface to limit the fixing projection 521 from rotating further by a predetermined angle.

The needle part 500 is a filler 511 melted by the heater 300 is pressed by the plunger 210, the filler 511 is ejected from the charging chamber 510 to the outside through the upper end of the filling operation Make it happen.

In the root canal charger (F) according to the present invention made as described above, since the air layer 410 is formed between the heater 300 and the protection member 400, the heat generated from the heater 300 passes the air layer 410. Because it is delivered to the body 100 will be able to prevent injury to the operator or the skin of the operator due to the high temperature heat.

In addition, since the plunger 210 is formed in a detachable type, only the pressure bar 210b that has been in contact with the filler 511 when the filler 511 is exhausted can be cleaned and then reassembled, thereby maintaining a clean state. Not only can it be recycled.

In addition, the present invention by forming the shape of the body in the form of a pen, the operator can be used to hold the root canal charger (F) in a convenient posture in accordance with the position to be charged.

(Second Embodiment)

8 is a perspective view showing a root canal charger according to a second embodiment of the present invention. Here, the same components as those in the first embodiment are denoted by the same reference numerals and the detailed description thereof will be omitted.

The root canal charger F 'according to the second embodiment of the present invention has a difference in power supply method compared with the first embodiment.

That is, the root canal charger F ′ according to the second embodiment receives the external power through the external power line 230 to operate the actuator 200. At this time, the external power source is supplied with a DC power source or an AC power source. If necessary, it is preferable to further configure an AC / DC converter or a stabilization circuit in the body 100.

In addition, since the root canal charger F ′ according to the second embodiment does not need to have a built-in battery, an integrated body (eg, the first body 100a and the lower body 100b) is not required as in the first embodiment. 100 ') is preferred.

Root canal charger made in this way is possible to continue the charging procedure without replacement of the battery.

100: Body
100a: Upper body
100b: lower body
110: cover
111: Confirmation window
120: cap
200: actuator
200a: drive shaft
200b: guide
210: plunger
210a: Plunger body
210b: pressure bar
211: first release
212: 2nd release door
213: connector
214: groove
215: Packing
216: mounting portion
220: battery
230: external power line
300: heater
400: protective member
410: air layer
420: fixing hole
500: needle part
510: charging room
511 filler
520: flange
521: fixed protrusion

Claims (8)

Cap 110, which is provided with a confirmation window 111, is detachable from the coupling so as to see the transport position of the plunger 210, and is coupled to the cover 110 and screwed to the open end by screwing cap ( 120 is provided with a body (100);
A guide 200b installed in the longitudinal direction inside the body 100 and a detachable plunger 210 that moves in the longitudinal direction in the interior of the body 100 by receiving the guide 200b. An actuator 200 installed inside the body 100 to operate the plunger 210;
A heater (300) installed at the guide (200b) so that one end thereof is positioned coaxially with the plunger (210) while facing the center axis of the cap (120);
A protection member 400 mounted on the guide 200b to be positioned inside the cap 120 to form an air layer 410 between the heater 300; And
The filling chamber 510 is fitted into the heater 300 through the protective member 400 so that the filler 511 may be pressurized by the plunger 210, and the predetermined angle is set in the protective member 400. Includes; needle portion 500 to be removed by rotating as much as,
The plunger 210, the plunger body (210a) and the pressure bar (210b) formed with a first detachable opening 211 and a second detachable opening 212 at one end portion so as to extend or connect in a longitudinal direction, respectively. It is made, including; The rear end of the plunger body (210a) is connected to the actuator for the root canal charger 200 is formed so as to move in the longitudinal direction, the outer peripheral surface of the groove 214 for preventing rotation is formed At least one is formed; Root canal charger having a detachable plunger, characterized in that the mounting portion 216 is fixed to the pressure bar (210b) by the packing 215 is fitted to the end by fastening with a fixing screw (216a) .
The method of claim 1,
Root canal charger having a detachable plunger, characterized in that the body 100 is formed in a pen type.
The method of claim 1,
The actuator 200 is a root canal charger having a detachable plunger, characterized in that the battery 220 stored in the body 100 or the external power line 230 is supplied with the necessary power from the outside.
The method of claim 1,
The pressurizing bar (210b) is a root canal charger having a separate plunger, characterized in that formed longer than the length of the charging chamber is inserted filler.
The method of claim 1,
The first removal opening 211 is made of a groove,
The second detachable opening 212 is a root canal charger with a removable plunger, characterized in that formed in the concave shape that can be accommodated in the groove.
The method of claim 1,
The connector 213 is a female screw,
The actuator 200 is a root canal charger having a separate plunger, characterized in that the stationary motor having a drive shaft (200a) is screwed with the female screw.
The method of claim 1,
The packing 215 is a root canal charger having a detachable plunger, characterized in that consisting of two stages of fluorocarbon resin (teflon) and PEEK (polyetheretherketone).
The method of claim 1,
The needle part 500 closes the cap 120 and further includes a flange 520 having a plurality of fixing protrusions 521 protruding at predetermined intervals from a lower surface thereof.
The protection member 400 is characterized in that the fixing projections 521 are inserted into the fixing hole 420 having a "+" groove for fixing the flange 520 so as not to be separated from the cap 120 is further formed Root canal charger equipped with a detachable plunger.

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