KR101440379B1 - Root canal filling apparatus integraled plunger - Google Patents

Abstract

In the present invention, since the plunger, which has been directly separated from the plunger body, is integrally formed, not only the loss or damage of the plunger is minimized even when the plunger is pulled out from the filling chamber for charging the filling material, An object of the present invention is to provide a root canal charger having an integral plunger capable of supplying the filling material safely and continuously without damaging the skin or the face of the practitioner or the recipient due to the heat.
In addition, the present invention further includes a desiccant, so that even if the pressurizing portion is fixed together by sticking after filling the filler, the pressurizing portion can be pulled out from the filling chamber by using the desorbing portion so that the needle portion can be recycled There is another purpose in providing a root canal charger.
In addition, the present invention allows the operator to perform the operation while changing the position of the root canal filling device according to the filling direction by making the root canal filling device into a pen type and operating the power supply of the actuator by a battery type or from outside. Another object of the present invention is to provide a root canal charger equipped with an integral type plunger which can be stably filled in a comfortable posture.

Description

[0001] ROOT CANAL FILLING APPARATUS INTEGRALED PLUNGER WITH INTEGRATED PLUNGER [0002]

More particularly, the present invention relates to a root canal filling apparatus having an integral plunger, and more particularly, to an apparatus and a method for forming an air duct between a heater for dissolving a filler and a root canal filling body to prevent heat generated from the heater from being directly transferred to the body, The present invention relates to a canal tube charger which can repeatedly use a needle portion while minimizing the risk of loss of the plunger while preventing the needle from being clogged by integrally configuring the plunger moving in the longitudinal direction by the actuator.

In general, root canal treatment is known to be a neurological treatment that removes the root canal contents by removing the root canal contents of the damaged teeth in the damaged or periapical tissues.

This root canal treatment removes root canal contents and then is filled with a non-invasive material (filler) to prevent reinfection of the root canal, allowing the teeth to function normally in the oral cavity.

At this time, a root canal charger is used for charging the filling material. Patent Document 1 discloses a root canal charger equipped with a detachable plunger applied by the present applicant. The endodontic charger forms an air layer between the heater and the body provided with a heating function for melting the filler so that the heat can be transferred through the air layer and the consumed amount of the filler can be checked, The heat generated from the heater of the heater can be prevented from being directly transmitted to the body, and the filler can be safely and continuously supplied without causing injury to the skin or the face of the practitioner or the patient.

However, such a detachable root canal charger has the following problems.

1) The plunger was separated from the plunger body. If the plunger is detached from the canal filling device to insert a new filling material into the filling chamber again after exhausting the filling material as well as the number of components, the plunger or the plunger body, which is a component thereof, may be lost .

(2) Since the loss of the root canal charger can not be used immediately or a new plunger must be prepared, the maintenance cost is increased.

(3) In addition, since the molten state of the filler is excellent by the heater, the filler which has melted at the time of filling the root canals may sometimes stick to the end of the plunger.

(4) Since this fixation can not be used by putting the filler back into the filling chamber, the needle should be discarded and replaced with a new one. There was a difficulty in recycling the needles.

Korean Application No. 10-2011-0124719

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is an object of the present invention to provide a plunger which is integrally formed with a plunger which has been separated from a plunger body, The present invention provides a root canal charger having an integral plunger for preventing heat generated from a patient from being directly transmitted to the body, thereby supplying the filling material safely and continuously without damaging the skin or the face of the practitioner or the patient. .

The present invention further provides a desiccant that allows the pressing portion to be pulled out of the filling chamber by using the desorption port even if the pressurizing portion is fixed to the filling chamber together with the exhaust after the exhaustion of the filler is completed so that the needle portion can be recycled, Another object is to provide a root canal charger equipped with a plunger.

In addition, the present invention allows the operator to perform the operation while changing the position of the root canal filling device according to the filling direction by making the root canal filling device into a pen type and operating the power supply of the actuator by a battery type or from outside. Another object of the present invention is to provide a root canal charger equipped with an integral type plunger which can be stably filled in a comfortable posture.

In order to achieve the above object, according to the present invention, there is provided a root canal charger equipped with an integrated plunger, wherein a lid having a confirmation window for viewing the delivery position of the plunger is coupled and detachable, A body having a cap fastened to the body; An actuator installed in the body so as to operate the plunger, the guide including a guide provided in the body in the longitudinal direction and a plunger guided by the guide and moving in the longitudinal direction within the body; A heater installed in the guide such that one end thereof is positioned inside the cap; A protective member mounted on the guide so as to be positioned inside the cap and forming an air layer between the cap and the heater; And a needle portion which is inserted into the heater through the protection member so that the filling material can be pressed by the plunger and is detached and attached to the protection member by a predetermined angle, A plunger body connected to an actuator for a root canal filler and having a connecting port formed in a longitudinal direction thereof and having at least one groove for preventing rotation from being formed on an outer circumferential surface thereof; And a pressing bar provided at one end with a packing and a pressing bar which is in close contact with the pressing portion to substantially press the pressing portion.

Particularly, the body is formed as a pen type.

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

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

In addition, the connector is a female screw, and the actuator is a normal / reverse motor having a drive shaft screwed with the female screw.

In addition, the packing is characterized in that it is made of a two-stage of a polyetheretherketone (PEEK) and a fluororesin (teflon).

In addition, the needle portion may be formed with a flange having a plurality of fixing protrusions protruding at predetermined intervals on the bottom surface of the cap, and the fixing protrusions may be inserted into the cap to fix the flanges so as not to be detached from the cap And a fixing hole having a "+ " -shaped groove is further formed.

Finally, in the root canal filling apparatus according to the present invention, a male screw portion and a fitting hole are formed on the surfaces where the pushing portion and the pushing bar abut each other, and a desorption port is provided so as to easily pull out the pushing portion embedded in the filling chamber; The desorption unit includes a head unit having a female threaded portion to be fitted in the filling chamber and to fasten the male threaded portion to an upper end thereof; And a grip portion formed integrally with the head portion.

The endocardial charger provided with the integral plunger of the present invention has the following effects.

(1) Since the plunger body constituting the plunger and the pressure bar are integrally formed, the components of the root canal filling device can be reduced. Thus, the risk of losing the plunger can be reduced if the plunger is removed to replace the filler after the filler is exhausted.

(2) Since the pressing portion fixed by the filling material remaining in the filling chamber can be removed by using the desorption port, the needle portion can be reused by inserting the new filling material into the filling chamber again.

(3) Heat generated in the heater is not directly transmitted to the body but is passed through the air layer, thereby preventing damage to the skin, which may be caused by contact with high temperature heat on the skin or the face.

(4) Since the consumed amount of the filler can be confirmed in the root canal filling machine, the re-supply time of the filling material can be easily confirmed even during the procedure, and the inconvenience of re-fitting the filler during the filling can be minimized.

(5) By making the root canal charger as a pen type, the practitioner can hold it while changing the position to be held arbitrarily. Therefore, it can be changed to a comfortable posture according to the position of the root canal charger, which varies depending on the position of the teeth and the charging position.

(6) The needle portion can be rotated by a predetermined angle to be easily detached from the root canal filling device, so that the filling of the filling material can be carried out easily and quickly.

1 is a perspective view showing a root canal charger according to a first embodiment of the present invention;
FIG. 2 is an exploded perspective view of a part of a root canal filling apparatus according to a first embodiment of the present invention. FIG.
3 is a cross-sectional view illustrating an internal configuration of a root canal charger according to Embodiment 1 of the present invention.
4 is an exploded perspective view showing an integral plunger structure according to an embodiment of the present invention.
FIGS. 5 and 6 are cross-sectional views illustrating an operating state of the plunger before and after the press according to the first embodiment of the present invention. FIG.
7 is a sectional view showing a process of separating a plunger from a needle portion according to Embodiment 1 of the present invention.
FIG. 8 is a perspective view showing a root canal charger according to a second embodiment of the present invention; FIG.
9 is a sectional view for showing a use state of a desorption port according to a third embodiment of the present invention.
10 is a perspective view showing a configuration of a desorption port according to a third embodiment of the present invention.

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.

FIG. 1 is a perspective view showing a root canal filling device according to a first embodiment of the present invention, and FIG. 2 is an exploded perspective view of a part of the root canal filling device according to the first embodiment of the present invention. 3 is a cross-sectional view illustrating an internal configuration of a root canal charger according to a first embodiment of the present invention.

The root canal filling machine F according to the first embodiment of the present invention comprises an hollow hollow body 100 having an inner hollow therein, an actuator 200 providing a driving force for pressing the filling material 511, A protective member 400 for forming an air layer 410 between the heater 300 and the needle 300 and a needle unit 500 for spraying the filler 511.

Particularly, the root canal filling machine F according to the first embodiment of the present invention prevents the heat generated from the heater 300 by the air layer 410 from directly touching the skin, the face, etc. of the practitioner or the patient through the body 100 So that an injury such as an image can be prevented in advance.

In addition, since the actuator 200 includes the integral plunger 210, the ease of use of the root canal filling machine is increased.

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

The body 100 is composed of an upper body 100a and a lower body 100b and is separated into a lid 110 so as to be separated and assembled to the left and right of the upper body 100a. In addition, it is preferable that the body 100 is formed in the shape of a pen so that the body 100 can be easily turned by hand, irrespective of the direction, so that the body 100 can be easily changed to a desired filling position .

In addition, the upper body 100a is formed in a tubular shape, and a lid 110 is provided on one side of the upper body 100a so as to be detachable and attachable in a one-touch style. A check window 111 is formed on the lid 110 so that the inside of the body 100 can be seen. At this time, the confirmation window 111 pushes the filler 511 by the operation amount of the actuator 200, that is, the operation of the actuator 200, which will be described later. So that the exhausted state of the filler 511 can be visually confirmed.

A cap 120 is disposed on the upper body 100a. The cap 120 is mounted on the upper end of the upper body 100a and the lid 110 in a screw-tight manner to close the upper portion. A mounting hole 121 is formed through the upper surface of the cap 120 to allow the needle portion 500 to be inserted into the center.

The lower body 100b is formed in a shape of a long vessel and is installed at a lower portion where the upper body 100a and the lid 110 are engaged with each other by a screw fastening method. The lower body 100b is used as a space for accommodating the battery 220. An electric circuit for supplying or controlling power may be further provided between the battery 220 and the actuator 200. [ 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 pressing the filler 511 fitted to the needle portion 500, and preferably a drive motor can be used.

Particularly, the actuator 200 is mounted with a plunger 210 for screwing the filler 511 substantially to the drive shaft. The plunger 210 converts the rotational motion of the actuator 200 into a straight line to press the filler 511. It is preferable that a mark (not shown) is formed on the surface of the plunger 210 so that the maximum and minimum lengths of the plunger 210 can be known. The mark may be visible from the outside through the confirmation window 111 So that the practitioner can visually confirm the consumption state of the filling material 511 at any time.

The actuator 200 is installed inside the body 100 so that the plunger 210 is positioned on the center axis of the body 100. In the figure, the actuator 200 is mounted on the lower portion of the upper body 100a so as not to fall downward, and is configured to be able to receive power from the battery 220 built in the lower body 100b.

Meanwhile, a guide 200b is installed in the upper body 100a. The guide 200b is for guiding the plunger 210 to move in the longitudinal direction without stably rotating. The guide 200b is disposed on the central axis line of the upper body 100a, and the end of the guide 200b is positioned below the cap 120. At this time, the length of the guide 200b allows a space for installing the heater 300 between the end portion and the cap 120 to be secured.

4 to 7, the actuator 200 is provided with a plunger 210 having an integral structure. The integral type plunger 210 includes a plunger body 210a which is screwed to the drive shaft 200a of the actuator 200 and a pressing member 210a formed integrally with the plunger body 210a and pressurizing the filler 511 And a bar 210b.

The plunger body 210a is a kind of rod member having a predetermined length and can be formed into various shapes in cross section, but it is also possible to manufacture the rod member in a circular shape so as to minimize frictional resistance when the rod member moves in the longitudinal direction desirable.

A connection port 213 is formed at the other end of the plunger body 210a to be coupled to the driving shaft 200a of the actuator 200. [ In this case, since the actuator 200 uses a regular motor rotating in the normal and reverse directions, the connector 213 is operated by the drive shaft 200a and can move the plunger body 210a in the longitudinal direction . In the preferred embodiment of the present invention, the connecting hole 213 is formed in a female screw shape so that the plunger body 210a can be moved in the longitudinal direction by the rotation of the driving shaft 200a, It is preferable that male threads are formed on the outer circumferential surface so as to be mutually engageable.

At least one rotation preventing groove 214 is formed on the outer circumferential surface of the plunger body 210a to prevent the plunger body 210a from rotating together even if the drive shaft 200a rotates. In the preferred embodiment of the present invention, since the plunger body 210a moves in the longitudinal direction, it is preferable that the groove 214 is formed over the entire length so as to prevent the rotation corresponding to the length. The figure shows an example in which two grooves 214 are formed at regular intervals. The groove 214 thus formed is guided by the guide 200b provided in the body 100 of the root canal filling device to prevent the plunger body 210a from rotating.

The pressure bar 210b is a rod member formed integrally with the plunger body 210a, and a pressing portion 216 is provided at an end thereof. As shown in Fig. 4, the pressing portion 216 is provided with a packing 215 on one side, and the packing 215 is preferably fixed by a fixing screw 216a.

On the other hand, 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 pressed without being leaked when the filling material 511 is pressurized. Such a packing 215 is exemplified in the present invention by sandwiching a pressurizing portion 216 made of a fluororesin (215a; teflon) and a PEEK (polyetheretherketone). That is, the packing 215 formed of the fluorine resin 215a and the PEEK 215b is inserted into the pressing portion 216 and the fixing screw 216a is fastened to the pressing portion 216 to fix the packing 215 will be. In the preferred embodiment of the present invention, the packing 215 is fixed by the fixing screw 216a. However, the packing 215 may be directly fixed to the pressing portion 216 without using the fixing screw 216a .

In the preferred embodiment of the present invention, the pressure bar 210b is preferably longer than the length of the filling chamber 510. This is because the pressure bar 210b pressurizes the filler 511 and exhausts the pressurizing bar 210b into the filling chamber 510. At this time, (511) to be completely exhausted.

When the filler 511 is completely consumed, the needle bar 500 is removed from the filling chamber 510 to be replaced with a new needle. At this time, the pressurizing portion 216 may escape to the outside of the filling chamber 510 together with the pressing bar 210b, or may be adhered to the remaining filling material 511 remaining in the filling chamber 510 as shown in FIG. 7 (b) And is separated from the pressure bar 210b. The needle portion 500 can be replaced with a new needle portion.

The heater 300 is a constituent element for melting the filler 511, and is made of a conventional technique widely used in this field. 5, the heater 300 is formed in a cylindrical shape so as to cover the outside of the filling chamber 510 in which the filler 511 is fitted, so that the whole can be melted.

The heater 300 is installed at the tip of the guide 200b so as to be positioned inside the cap 120. [ In the preferred embodiment of the present invention, the heater 300 is disposed coaxially with the plunger 210 to allow the plunger 210 to press the filler 511 by driving the actuator 200 desirable.

It is preferable that the heater 300 is formed so as not to interfere with each other when the needle unit 500 is mounted on the protective member 400 by preventing the cap unit 120 from protruding outward.

3 or FIG. 5, the protective member 400 may be formed by forming an air layer 410 between the heater 300 and the heater 300 to prevent burn-in or the like, It is the role of supporting.

The protective member 400 is formed in a closed cylinder shape, and is fitted and fixed to the distal end of the guide 200b. At this time, it is preferable that the upper end of the protection member 400 is formed so as not to protrude outward of the cap 120, and is fixed by the cap 120.

In addition, although the protective member 400 is described as a cylinder, it is not limited thereto. For example, it is also possible to make a stepped shape in two steps as shown in the drawing, in consideration of the self-stiffness, installation space, and the like.

Finally, a fixing hole 420 is formed on the upper surface of the protective member 400. Particularly, the needle portion 500 is inserted into the fixing hole 420, and a "+" -shaped groove is further formed to fix the needle portion 500. The fixing hole 420 is formed so as to be coaxial with the plunger 210 so that the plunger 210 and the filler 511 are positioned coaxially with each other when the needle 500 is inserted and fixed desirable.

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

Particularly, the flange 520 abuts against the upper surface of the protective member 400, and a fixing protrusion 521 protrudes downward from the bottom surface thereof. The fixing protrusion 521 is a portion to be inserted into the "+" groove of the fixing hole 420. When the needle portion 500 is rotated while holding the cap 120, So that the needle portion 500 is fixed. In the preferred embodiment of the present invention, the needle portion 500 is preferably rotated by an angle of less than 90 degrees so as to prevent the fixing protrusions 521 from protruding into other neighboring "+" It is preferable that a locking protrusion (not shown) is formed on the inner surface of the fixing hole 420 to limit rotation of the fixing protrusion 521 when the fixing protrusion 521 is rotated by a predetermined angle.

As the filler 511 melted by the heater 300 is pressed by the plunger 210, the filler 511 is ejected from the filler chamber 510 to the outside through the upper part of the needle part 500, .

Since the endotracheal tube F according to the present invention has the air layer 410 formed between the heater 300 and the protective member 400, the heat generated from the heater 300 passes through the air layer 410 It is possible to prevent the skin of the practitioner or the recipient from being injured by the heat of the high temperature since it is transmitted to the body 100.

In addition, according to the present invention, the shape of the body is formed into a pen type so that the practitioner can grasp the endocardial charger F in a convenient posture suitable for the position to be filled.

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

The root canal filling device F 'according to the second embodiment of the present invention differs from the first embodiment in power supply method.

That is, the root canal filling device F 'according to the second embodiment operates the actuator 200 by receiving external power through the external power line 230. At this time, the external power source is supplied with DC power or AC power. If necessary, it is preferable to configure an AC / DC converter or a stabilization circuit in the body 100.

Since the root canal filling machine F 'according to the second embodiment does not need to incorporate a battery, it is not necessary to divide the upper body 100a and the lower body 100b into one body 100 ').

The root canal filling apparatus according to the third embodiment of the present invention has the same configuration as that of the first and second embodiments. After the filling material 511 is exhausted from the filling chamber 510, So that the needle portion 500 can be recycled. As shown in FIGS. 9 and 10, a detachable attachment 600 is further configured to remove the pressing portion 216 fixed to the charging chamber 510 for this purpose.

To this end, a male screw portion 216b and a fitting hole 217 are formed on the surfaces of the pressing portion 216 and the pressing bar 210b facing each other. At this time, the male thread portion 216b is fitted to the insertion hole 217 by a hand or the like so that it can be pulled out or inserted.

Further, a desorption port 600 is further provided to allow the pressurizing portion 216 fixed inside the charging chamber 510 to be removed. 10, includes a head portion 610 which is fitted to the inside of the filling chamber 510 and a grip portion 620 which is formed integrally with the head portion 610, do.

Particularly, the length of the head portion 610 is made longer than the length of the filling chamber 510, and the diameter of the head portion 610 is smaller than the inner diameter of the filling chamber 510 so that the head portion 610 can be easily fitted into the filling chamber 510 . The head portion 610 is formed with a female screw portion 611 so that the male screw portion 216b can be fastened to the end portion thereof.

The grip portion 620 may be formed in any shape and may be integrally formed with the head portion 610 so that the removable attachment 600 can be rotated by hand. In the drawing, an example is shown in the form of a bar.

Such a desorption port 600 is used in the following situation. As the filler 511 is completely exhausted, the pressurizing bar 210b is pressed to the inside of the filling chamber 510, as shown in Fig. 7 (a). In this state, as shown in FIG. 7B, the plunger body 210a is pulled downward in the drawing, so that the pressure bar 210b is pulled out of the filling chamber 510. At this time, the pressing part 216 is fixed to the filling chamber 510 by the residual filler 511. Therefore, in order to recycle the needle portion 500, the pressing portion 216 must be removed and then the filling chamber 510 should be filled with a new filling material 511.

First, the head portion 610 is inserted into the filling chamber 510 so that the female screw portion 611 is fastened to the male screw portion 216b. When the fastening is completed, the grip portion 620 is gripped and pulled forcibly to pull out the pressing portion 216 from the fixed filler 511.

Thus, in the present invention, since the plunger is integrally formed as compared with the detachable plunger, the plunger can be prevented from being lost, and the pressed portion can be taken out to reuse the needle without discarding the needle portion.

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
213: connector 214: groove
215: packing 216:
220: Battery 230: External power line
300: heater 400: protective member
410: air layer 420: fixing hole
500: Needle portion 510: Charging chamber
511: Filler 520: Flange
521: Fixing projection

Claims (8)

A cover 110 having a check window 111 for viewing the transport position of the plunger 210 can be engaged with and detached from the cover 110 and a cap 120; < / RTI >
A guide 200b provided in the body 100 in the longitudinal direction and a plunger 210 moving in the longitudinal direction of the body 100 under the guidance of the guide 200b, An actuator 200 installed inside the body 100 to operate the actuator 200;
A heater 300 installed on the guide 200b so that one end thereof is positioned inside the cap 120;
A protective member 400 mounted on the guide 200b to form an air layer 410 with the heater 300 so as to be positioned inside the cap 120; And
The charging chamber 510 is fitted into the heater 300 through the protection member 400 so that the filling member 511 can be pressed by the plunger 210, (500) which is detached and attached according to the rotation of the needle portion
The plunger 210 includes a plunger body 210a connected to an actuator 200 for a root canal filling machine and having a connecting port 213 for moving in a longitudinal direction and having at least one groove 214 for preventing rotation from being formed on an outer circumferential surface thereof; And a pressurizing part 216 having a packing 215 at one end and a pressing bar 210b for pressing and pressing the pressurizing part 216 integrally with the plunger body 210a Characterized in that it comprises an integral plunger.
The method according to claim 1,
Wherein the body (100) is formed as a pen type.
The method according to claim 1,
Wherein the actuator (200) is supplied with necessary power through a battery (220) stored in the body (100) or an external power line (230) from the outside.
The method according to claim 1,
Wherein the pressure bar (210b) is longer than the length of the filling chamber into which the filler is inserted.
The method according to claim 1,
The connector 213 is a female screw,
Wherein the actuator (200) is a forward and reverse motor having a drive shaft (200a) screwed with the female screw.
The method according to claim 1,
Wherein the packing (215) comprises two ends of a fluorocarbon resin (teflon) and a polyetheretherketone (PEEK).
The method according to claim 1,
The needle unit 500 has a flange 520 on which a plurality of fixing protrusions 521 are protruded at predetermined intervals on the bottom surface of the cap 120,
The protective member 400 is further formed with a fixing hole 420 having a "+" groove for fixing the flange 520 so that the flange 520 is not separated from the cap 120 by fitting the fixing protrusion 521. Wherein the end-effector is provided with an integral plunger.
8. The method according to any one of claims 1 to 7,
A male screw portion 216b and a fitting hole 217 are formed on the surfaces where the pressing portion 216 and the pressing bar 210b are in contact with each other,
A detachable accessory 600 is provided to easily remove the pressing portion 216 inserted into the charging chamber 510,
The detachable attachment 600 includes a head part 610 fitted to the filling chamber 510 and having a female screw part 611 formed at an upper end thereof to fasten the male screw part 216b; And a grip part (620) formed integrally with the head part (610).

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