KR102082848B1 - Method for root canal filling and apparatus for the same - Google Patents

Abstract

The present invention relates to a root canal filling method. The root canal filling method according to one embodiment of the present invention comprises: a step of preparing a root canal filling material comprising calcium silicate and H_2O which has not been degassed; a step of providing the root canal filling material in a storage container; a step of generating air bubbles in the root canal filling material by applying ultrasonic waves to the storage container; and a step of pressurizing the root canal filling material having generated air bubbles with a pressurizing part to be discharged from the storage container and spraying the same through a nozzle while making a root canal suck the same. In the air bubble generating step, the ultrasonic waves can be applied at a predetermined intensity or more in order to generate air bubbles in the root canal filling material.

Description

Root canal filling method and apparatus {METHOD FOR ROOT CANAL FILLING AND APPARATUS FOR THE SAME}

The present invention relates to a root canal filling method and apparatus.

Conventionally, a method of injecting a filling material into the root canal using a syringe-needle for root canal filling is known. However, in this prior art, the high viscosity of the filling material and the air present in the root canal act as a resistance, thereby limiting the injection to the tooth end portion.

In addition, dental instruments exist to facilitate root canal filling. The technique disclosed in Japanese Patent Application Laid-Open No. 05-200054 (name of invention: Root canal filling device) is one of them, and the essential points of the above technique are shown in FIG. In the prior art root canal filling apparatus shown in FIG. 1, the vacuum pump 1 is connected to the nozzle 6, the nozzle 6 is installed in the open tooth, and the pump is operated to lower the pressure in the chamber. After that, the nozzle 6 is removed, the vacuum pump 1 is connected to the nozzle 8, the nozzle 8 is installed in the open tooth and the pump is operated. While the suction is carried out through the tube 14 and the annular first channel 15 and the lever 20 is pressed, the reservoir 17 is opened and the filling material 16 is sucked through the second channel 21. The key to this prior art is that suction is performed to fill the root canal filling material into the root canal to fill the root canal with this suction force.

The present inventors proceeded further research based on the recognition of the prior art to the present invention. The present inventors carried out the suction at the same time as the filling by the pressing force, in addition to filling the root canal with the suction force in the technique disclosed in the Japanese patent application disclosed above. In addition, the inventors have introduced additional technical means. In the filling of the root canal, the present inventors have introduced ultrasonic technology to the root canal filling material as an additional technical means other than the filling and inhalation of the filler by the pressing force.

In Korean Patent Application No. 10-2017-0064117 (name of the invention: Root canal treatment device), an apparatus for improving the root canal filling efficiency by introducing ultrasonic waves into the root canal filling material by lowering the fluidity of the material filling the root canal has been introduced. After the above filing of the same applicant, the inventors conducted further studies. The present inventors have led to the present invention by developing a method and apparatus capable of filling the root canal closely and closely by lowering the porosity of the root canal filling material in addition to lowering the fluidity of the root canal filling material.

It is an object of the present invention not only to apply ultrasonic waves, but also to develop a method for lowering the porosity of the root canal filling material by applying ultrasonic waves.

In addition, the present invention is not only to apply ultrasonic waves, but also to develop a root canal filling apparatus that operates under conditions that can lower the porosity of the root canal filling material by applying ultrasonic waves.

Representative configuration of the present invention for achieving the above object is as follows.

A root canal filling method according to an embodiment of the present invention comprises the steps of preparing a root canal filling material comprising Calcium Silicate and H ₂ O without gas; Providing the root canal filling material to a storage container; Generating bubbles in the root canal filling material by applying ultrasonic waves to the storage container; And pressurizing the bubble-producing root canal filling material into the pressurizing unit to discharge from the storage container and to inhale from the root canal while spraying through the nozzle. In the bubble generation step, ultrasonic application is applied at a specific intensity or more to generate bubbles in the root canal filling material.

The specific intensity of the ultrasonic application is 0.825 W / cm ² under ultrasonic vibration conditions of 40 kHz.

In addition, the root canal filling device according to an embodiment of the present invention, the storage container 310 is stored in the root canal filling material 130 containing Calcium Silicate and H ₂ O is not removed gas as a filling material for filling the root canal Wow; An ultrasonic oscillator 320 connected to the storage container 310 and applying ultrasonic waves to the filling material stored in the storage container; An injection hole connected to the storage container 310 and passing until the filling material 130 stored in the storage container 310 is discharged toward the root canal; A suction port for sucking air in the root canal; And a pressurizing portion 312 for pressurizing the filling material of the storage container to discharge the filling material through the injection hole. The ultrasonic oscillator 320 generates bubbles in the filling material by applying ultrasonic waves having a specific intensity or more to the filling material stored in the storage container.

The specific intensity is 0.825 W / cm ² at 40 kHz ultrasonic vibration conditions.

In addition to the additional configuration may be further included in the root canal filling method or root canal filling device according to the present invention.

According to the present invention, a method of lowering the porosity of the root canal filling material may be provided by not only applying ultrasonic waves but also by applying ultrasonic waves.

In addition, according to the present invention, the root canal filling apparatus may be provided that operates under conditions that can lower the porosity of the root canal filling material by not only applying ultrasonic waves but also by applying ultrasonic waves.

1 is a view showing a root canal filling device of the prior art.
2 is a view showing each component of the root canal filling device according to an embodiment of the present invention.
3 is a photograph of a state change of the root canal filling material according to the conditions of pressurizing the filling material, performing suction and applying ultrasonic waves.
4 is a view showing experimental conditions that can lower the porosity of the root canal filling material under ultrasonic application.
FIG. 5 is a graph showing the porosity and bubble generation of the root canal filling material measured by varying the type of water included in the root canal filling material and the ultrasonic power output condition.
FIG. 6 is a SEM photograph of the root canal filling material under H ₂ O without gas removal and ultrasonic output conditions of 0.275 W / cm ² .
FIG. 7 is a SEM photograph of the root canal filling material under H ₂ O without gas removal and an ultrasonic power output condition of 0.825 W / cm ² .
8 is a SEM photograph of the root canal filling material under H ₂ O without gas removal and ultrasonic output conditions of 1.650 W / cm ² .
9 is a SEM photograph of the root canal filling material under degassed H ₂ O and ultrasonic output conditions of 0.275 W / cm ² .
10 is a SEM photograph of the root canal filling material under degassed H ₂ O and ultrasonic output conditions of 0.825 W / cm ² .
FIG. 11 is a SEM photograph of the root canal filling material under degassing H ₂ O and ultrasonic output conditions of 1.650 W / cm ² .
FIG. 12 is a photograph of bubbles generated from a root canal filling material using H ₂ O without degassing when the ultrasonic power is 0.825 W / cm ² .
FIG. 13 is a photograph of a state in which bubbles are not generated in the root canal filling material using degassed H ₂ O when the ultrasonic power is 0.825 W / cm ² .

DETAILED DESCRIPTION OF THE INVENTION The following detailed description of the invention refers to the accompanying drawings that show, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It is to be understood that the various embodiments of the invention are different but need not be mutually exclusive. For example, certain shapes, structures, and characteristics described herein may be implemented with changes from one embodiment to another without departing from the spirit and scope of the invention. In addition, it is to be understood that the location or arrangement of individual components within each embodiment may be changed without departing from the spirit and scope of the invention. Accordingly, the following detailed description is not to be taken in a limiting sense, and the scope of the present invention should be taken as encompassing the scope of the claims of the claims and all equivalents thereof. Like reference numerals in the drawings denote the same or similar elements throughout the several aspects.

Hereinafter, various preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention.

Overall device configuration and how the device works

The root canal filling apparatus 300 according to an embodiment of the present invention may include a storage container 310, an ultrasonic oscillator 320, and a nozzle 330.

The storage container 310 receives the filling material 130 from an external filling material storage unit (not shown) to accommodate the filling material 130 therein.

The pressing unit 312 pressurizes the filling material 130 in the storage container 310 to discharge the filling material 130 from the injection hole of the nozzle 330 which will be described later. In the present invention, the storage container 310 and the pressurizing portion 312 may be formed in a syringe shape as the cylinder 310 and the piston 312 as shown. At this time, the piston 312 may automatically move up and down by the force of the motor to pressurize the filling material 130 filled in the cylinder (310).

The ultrasonic oscillator 320 applies ultrasonic waves to the filling material 130 stored in the storage container 310. The inner particles of the root canal filling material have a high viscosity due to the strong bonding force with each other, and the bonding between the inner particles can be broken by applying ultrasonic waves to the root canal filling material. Therefore, since the viscosity of the filling material 130 may be lowered by applying ultrasonic waves to the filling material 130 by the ultrasonic oscillator 320, the filling material 130 may be smoothly flowed.

The nozzle 330 may include a jet port and a suction port. In this embodiment, the air in the root canal is sucked through the suction port and discharged to the outside. The air in the root canal may act as a resistance when the filling material 130 is filled, and the air in the root canal may be removed through the inlet, and as described above, the flow of the filling material 130 may be changed by the ultrasonic oscillator 320. Since it can be improved, it is possible to effectively fill the filler material 130 to the tooth end portion.

Hereinafter, an operation of filling the filling material 130 in the root canal using the root canal filling device 300 described with reference to FIG. 2 will be described.

The filling material 130 may be supplied into the storage container 310 from the filling material storage unit (not shown) in which the filling material 130 is stored.

When the filling material 310 is supplied into the storage container 310, the filling material 130 may be pressed by the pressing unit 312 and discharged through the injection hole of the nozzle 330 by pressure. In this case, the ultrasonic oscillator 320 may lower the viscosity of the filling material 130 by applying ultrasonic waves to the filling material 130 accommodated in the storage container 310. Thus, the flow characteristics of the filler material 130 may be improved. The improved flow characteristics of the filler material 130 do not only contribute to flow in the dental root canal. The improved flow characteristics of the filling material 130 is such that the filling material 130 flows from the storage container 310 toward the nozzle of the nozzle 330, that is, the filling material 130 inside the root canal filling device 300. It also produces a beneficial effect on flow. The ultrasonic oscillator 320 lowers the porosity by bringing the stirring effect of the filling material 130 when operating to generate bubbles in the filling material 130 in addition to the technical effect of lowering the viscosity of the filling material 130 to improve the flow characteristics As a result, it is possible to bring about an effect of improving the filling rate, which is a main feature of the present invention. This will be described later with reference to the experimental results.

The filling material 130 is discharged toward the root canal through the injection hole of the nozzle 330 and at the same time, the suction port sucks air in the root canal and discharges it to the outside.

As described above, the ultrasonic oscillator 320 improves the flow characteristics of the filling material 130 and removes the air in the root canal, which acts as a resistance when the filling material 130 is filled in the root canal, through the suction port, and thus the tooth end portion. Up to the filling material 130 can be effectively charged.

The left, center, and right photographs of FIG. 3 show that the filling material 130 is filled in the root canal only by pressing by the pressing part 312, respectively, by pressing by the pressing part 312 and in the root canal by the suction port 234. When the air intake is performed at the same time and the filling material 130 is filled in the root canal, pressurization by the pressurizing unit 312 and air suction in the root canal by the suction port and ultrasonic application by the ultrasonic oscillator 320 are performed simultaneously. In the case where 130 is filled in the root canal, the cross-sectional view of the root canal of the tooth is enlarged by SEM imaging. As can be seen in the right picture of FIG. 3, when the pressurization by the pressing unit 312, suction of air in the root canal, and ultrasonic application are simultaneously performed, the filling material 130 may be most densely filled in the root canal.

Conducting experiments on the conditions for lowering the porosity of the filler material by ultrasonic application

FIG. 4 is a view showing experimental performance conditions for lowering the porosity of the root canal filling material under ultrasonic application.

Specifically, the pressurizing portion 312 of the root canal filling device described in the above embodiment was pressed at a pressure of 0.5 bar. In addition, the ultrasonic oscillator 320 was operated at a frequency of 40kHz, the interval between the nozzle and the intermediate portion of the ultrasonic oscillator 320 was 30mm.

We used a mixture of Calcium Silicate and H ₂ O as the root canal filling material. The ratio was defined as Calcium Silicate 38.0% by weight, H ₂ O 62.0% by weight. H ₂ O was tested using two types. One used tap water as a general H ₂ O gas, and the other used degassed H ₂ O. In addition, the present inventors adjust the intensity of 0.275W / cm ² to about 1.650W / cm ^2, and the ultrasonic output was measured for porosity of the root canal filling material. The experimental results are shown in the graph of FIG.

Has been shown only the results for the three ultrasonic output graph of Figure 5, the present inventors have carried out an experiment for a plurality of ultrasonic output, which is not shown in the graph of Figure 5 between 0.275W / cm ² and 0.825W / cm ² It was. The experimental results at 0.825 W / cm ² are characteristically shown in FIG. 5 and explained here because the generation of bubbles was observed in H ₂ O without degassing at the ultrasonic power of this intensity. At the ultrasonic power of 0.825W / cm ² or more, bubbles were observed up to the maximum ultrasonic power of 1.650W / cm ² , and the porosity continued to decrease.

Specifically, the porosity was measured to be 22.98% when a mixture of H ₂ O without degassing and Calcium Silicate was used as the root canal filling material at an ultrasonic power of 0.275 W / cm ² . The porosity was measured to be 23.31% when a mixture of degassed H ₂ O and Calcium Silicate was used as the root canal filling material at the same ultrasonic power. In both cases no bubbles were observed.

The porosity was measured to be 19.22% when a mixture of degassed H ₂ O and Calcium Silicate was used as the root canal filling material at an ultrasonic power of 0.825 W / cm ² . The porosity was measured to be 20.51% when a mixture of degassed H ₂ O and Calcium Silicate was used as the root canal filling material at the same ultrasonic power. Bubble generation was observed in H ₂ O without degassing, and bubble generation was not observed in H ₂ O without degassing.

A mixture of H ₂ O and Calcium Silicate without degassing is used as the root canal filling material, and special attention is given to the experimental conditions with an ultrasonic power of 0.825 W / cm ² . The present inventors were not carrying out experiments for a plurality of ultrasonic output condition, the ultrasonic output immediately before the bubble 0.825W / cm ² is not observed up to the ultrasound output of 0.825W / cm ² from the ultrasonic output of 0.275W / cm ² . Porosity until just before the ultrasonic output of 0.825W / cm ² is a show a linear decrease mode, 0.825W / cm ² reaches the output of the ultrasonic air bubbles began to be observed there was not observed prior to the abrupt decrease in porosity was observed nonlinear .

More specifically, the present inventors have measured the porosity at an interval of 0.05W / cm ² down to the ultrasound output of 0.825W / cm ² from the ultrasonic output of 0.275W / cm ^2, was observed whether the bubbling. The ultrasonic power change interval was set to be narrower than the ultrasonic power change interval in the section exceeding 0.825W / cm ^2, and before the bubble was measured, a relatively fine section was set compared to after the measurement of the bubble occurrence. . The porosity measured in the H ₂ O gas is not removed from the ultrasonic output of 0.825W / cm ² ultrasound output ultrasonic output is 0.775W / cm ² immediately before is 19.78%, and the value of ultrasonic output of 0.825W / cm ² There is a difference of 0.56% from the measured porosity at. 0.275W / from the ultrasonic wave output from the ² cm 0.825W / to the output of the ultrasonic cm ² 0.05W / cm ² interval of one per segment porosity fell in the previous 10 sections in the total of 11 sections, while the aortic Soi to about 0.32% , the last one period, that is, showed a decline of 0.56% porosity in the interval from the output of the ultrasonic 0.775W / cm ² to the ultrasound output of 0.825W / cm ^2, a broken linear porosity falling trend occurred a non-linear fall porosity. The inventors have identified the cause as the generation of bubbles.

The porosity was measured to be 12.28% when a mixture of degassed H ₂ O and Calcium Silicate was used as the root canal filling material at an ultrasonic power of 1.65 W / cm ² . The porosity was determined to be 20.19% when a mixture of degassed H ₂ O and Calcium Silicate was used as the root canal filling material at the same ultrasonic power. Bubble generation was observed in H ₂ O without degassing, and bubble generation was not observed in H ₂ O without degassing.

6 to 11 show SEM photographs of the material used as the root canal filling material in the experiment of the present invention under the six conditions shown in the graph of FIG. 5. In these pictures, the gas is not removed from H ₂ O is used and the ultrasonic output is 0.825W / cm ² in the same H ₂ O and is used when filling the root canal as compared to the rest of the case, if the ultrasonic output 1.650W / cm ² It can be seen that the material is dense and the pore size is reduced.

FIG. 12 is a photograph of bubbles generated from a root canal filling material using H ₂ O without degassing when the ultrasonic power is 0.825 W / cm ² . In FIG. 12, when 38.0% by weight of Calcium Silicate and 62.0% by weight of H ₂ O without degassing were used as the root canal filling material, bubbles were observed. 12 is a bubble in which circular objects observed in the center and around the 10 o'clock direction are indicated by circular dotted lines.

On the other hand, Figure 13 is a photograph of the root canal filling material using the degassed H ₂ O at the same ultrasonic power output. In FIG. 13, when 38.0% by weight of Calcium Silicate and 62.0% by weight of degassed H ₂ O are used as the root canal filling material, bubbles are not observed. 12 and 13 are images taken using a microscope of 10 magnification, respectively.

As a result of the experiment as described above, the facts confirmed by the present inventors can be summarized as follows.

1. In the experimental conditions where Calcium Silicate and H ₂ O without degassing were used as root canal filling materials, the decrease in porosity was observed with increasing ultrasonic power.

2. Bubbles were observed when the ultrasonic power was 0.825 W / cm ^{2 or} more under the same conditions.

3. In the experimental conditions where Calcium Silicate and degassed H ₂ O were used as the root canal filling material, the decrease in porosity was observed with increasing ultrasonic power.

4. No bubbles were observed under the same conditions regardless of the magnitude of the ultrasonic power output.

5. For Calcium Silicate based root canal filling, whether water contains gas has a direct effect on the generation of bubbles when ultrasonic is applied.

6. If no bubbles are generated, it is difficult to reduce the porosity even if ultrasonic waves are applied and the output is increased.

7. The technique of generating bubbles by applying ultrasonic waves to the root canal filler reduces the porosity and consequently increases the filling ratio.

Calcium Silicate (CaSiO ₄ ) cement-based root canal fillers need to have a high filling rate to prevent reinfection after root canal neurotherapy. Bubbles generated by ultrasonic application are believed to have a stirring effect on the root canal filler to remove voids in the spaces between the filler particles, thereby reducing the porosity and increasing the filler filling rate. In this case, since the H ₂ O-based root canal filling material does not generate air bubbles even when ultrasonic waves are applied, the root canal filling material made of H ₂ O without gas degassing must be used in order to obtain agitation effect through bubble generation. In order to generate bubbles, an ultrasonic power of a certain intensity or more is required.

New root canal filling method and device based on experimental results

The present inventors derived the following new root canal filling method based on the experimental results described above.

First, a root canal filling material including Calcium Silicate and H ₂ O without degassing is prepared as a first step of root canal filling.

As a second step, the root canal filling material is provided in a storage container.

As a third step, ultrasonic waves are applied to the reservoir to generate bubbles in the root canal filling material. In order to generate bubbles in the root canal filling material, the application of ultrasonic vibration is at a specific intensity or more. Specifically, the intensity of the ultrasonic wave applied under the ultrasonic vibration condition of 40 kHz is 0.825 W / cm ² or more.

In a fourth step, the canal filling material in which bubbles are generated is pressurized by a pressurizing unit, discharged from the storage container, and sprayed through the nozzle to inhale from the root canal.

The inventors of the present invention confirmed that the application of the root canal filling method not only applies ultrasonic waves, but also lowers the porosity of the root canal filling material by applying ultrasonic waves, and consequently achieves a high filling rate of the root canal filling material into the root canal. .

In addition, the present inventors derive the following new root canal filling apparatus based on the experimental results described above and the root canal filling apparatus structure shown in FIG. 2.

The root canal filling apparatus includes: a storage container 310 in which a root canal filling material 130 including Calcium Silicate and H ₂ O in which gas is not removed as a filling material for filling the root canal is stored; An ultrasonic oscillator 320 connected to the storage container 310 and applying ultrasonic waves to the filling material stored in the storage container; An injection hole connected to the storage container 310 and passing until the filling material 130 stored in the storage container 310 is discharged toward the root canal; A suction port for sucking air in the root canal; And a pressurizing portion 312 for pressurizing the filling material of the storage container to discharge the filling material through the injection hole. The ultrasonic oscillator 320 generates bubbles in the filling material by applying ultrasonic waves having a specific intensity or more to the filling material stored in the storage container. Specifically, the intensity of the ultrasonic wave applied under the ultrasonic vibration condition of 40 kHz is 0.825 W / cm ² or more. It should be noted that when the ultrasonic oscillator 320 operates under conditions that generate bubbles in the root canal filling material 130, the ultrasonic oscillator 320 operates as a means for reducing the porosity of the root canal filling material 130.

The present inventors have found that by using such a root canal filling device, not only the application of ultrasonic waves but also the application of ultrasonic waves can lower the porosity of the root canal filling material and consequently achieve a high filling rate of the root canal filling material into the root canal. .

Although the present invention has been described by specific matters such as specific components and limited embodiments and drawings, it is provided only to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments. Those skilled in the art can make various modifications and changes from this description.

Therefore, the spirit of the present invention should not be limited to the above-described embodiments, and all the scope equivalent to or equivalent to the scope of the claims as well as the claims to be described below are within the scope of the spirit of the present invention. Will belong to.

130: filling material
300: root canal filling device
310: storage container
312: pressurization
320: ultrasonic oscillator
330: nozzle

Claims (4)

delete delete A storage container 310 in which the root canal filling material 130 including Calcium Silicate and H ₂ O in which gas is not removed as a filling material for filling the root canal is stored;
An ultrasonic oscillator 320 connected to the storage container 310 and applying ultrasonic waves to the root canal filling material stored in the storage container;
An injection hole connected to the storage container 310 and passing until the root canal filling material 130 stored in the storage container 310 is discharged toward the root canal;
An inlet for sucking air in the root canal;
And a pressurizing part 312 which pressurizes the root canal filling material of the storage container and discharges it through the injection hole.
The ultrasonic oscillator 320 generates bubbles in the root canal filling material by applying an ultrasonic wave of 0.825 W / cm ² or more to the root canal filling material stored in the storage container at an ultrasonic vibration condition of 40 kHz.
Root canal filling device. delete

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