JPH11299806A - Syringe for housing gutta-percha - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a syringe for housing gutta-percha capable of easily heating, softening and extruding the gutta-percha for being injected and filled inside a root canal by utilizing a flame at the time of performing root canal treatment in a dental treatment field. SOLUTION: A syringe outer cylinder 1 for extruding the gutta-percha 6 housed in the inside from an extrusion nozzle port 2 at a tip by a plunger 5 is constituted of a material whose heat conductivity is <=20 W/m.K and fusing point is >=250 deg.C. It is more preferable to provide a supporting base 3 for supporting the softened gutta-percha 6 extruded from the extrusion nozzle port 2 on the tip and to provide a reversible temperature indication material 4 for indicating that is becomes a temperature higher than the softening temperature of the housed gutta-percha 6 by a prescribed temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for easily softening and extruding a rattle aperture for injecting and filling into a root canal in a dental treatment field in a short time using a flame. The present invention relates to a playable storage syringe.

[0002]

2. Description of the Related Art When a root canal treatment is required due to tooth decay or the like, a dentist removes the dental pulp, enlarges and forms the root canal, and injects and fills the formed root canal with a filling material. In order to perform this treatment, the length of the root canal is measured in advance using an X-ray or the like, and a reamer or a file corresponding to the length of the root canal is selected. At this time, positioning according to the root canal length is performed using a stopper previously attached to the reamer and the file. After that, several reamers and files in accordance with the ISO standard are used in order from the thinner one, and the root canal is enlarged and formed while taking time and effort.

[0003] Here, the dentist must be most careful in preventing the reamer or file from protruding from the tip (apical tip) of the root. This is because the inside of the root canal and the outside of the apex are completely different from a biological point of view. In other words, the inside of the root canal has not been activated much as a living body after removing the dental pulp, but the outside of the apex has been activated,
Various biological activities such as blood circulation, repair of destroyed cells, and biological defense by macrophages are performed.

[0004] After the root canal is enlarged and formed using a reamer, a file, or the like, and the condition inside and outside the root canal is sufficiently recognized, the dentist fills the root canal with the apical part. In order to perform such a filling operation carefully, the master point or accessory point, which is a solid backlash, was conventionally pushed into the root canal using a plugger or a sprayer. However, this requires 5 to 10 minutes per root canal. If the root canal is not completely sealed by filling the root canal with gutta-percha, bacteria will grow especially in the apical part and a cavity is formed in the tooth bone. Therefore, the dentist must perform this treatment operation with great care.

[0005] In order to perform such a treatment operation more easily, there is a method of heating and softening the backlash stored in the syringe together with the syringe, extruding a required amount thereof, and injecting and filling the root canal into the root canal. However, the conventional method requires a special and expensive heater for heating and softening the backlash through the syringe while the syringe containing the backlash is inserted and held in the syringe insertion hole, and The phenomenon that the softened rattle perch cools and hardens during root canal treatment and can no longer be operated may occur. When the backlash in the syringe has hardened in this way, the back-injected backlash must be removed from the root canal and refilled. In the case of performing such a refilling operation, a reheating time of about 10 minutes is required to soften the backlash by a heater again via a syringe, so that the workability is very poor. there were.

[0006]

SUMMARY OF THE INVENTION As described above, the present invention solves the above-mentioned drawbacks and provides a special and expensive heater for heating and softening the backlash stored in the syringe to a predetermined temperature. A predetermined temperature can be obtained by short-time heating by a simple heating tool using a flame such as a gas burner or an alcohol lamp, and the backlash other than the backlash at the tip to be heated and softened is softened. An object of the present invention is to provide a syringe for storing a backlash that does not cause damage to the quality of the syringe.

[0007]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, a syringe outer cylinder in which a backlash stored inside the plunger is pushed out from an extruding nozzle port at a tip thereof, Thermal conductivity 20W /
If it is made of a material with m · K or less and a melting point of 250 ° C. or more, since the material has excellent heat resistance, a simple flame using a gas burner or an alcohol lamp attached to a medical chair of a dental clinic can be used. It is possible to heat and soften the backgutter at the tip to a predetermined temperature by heating for a short time with a heating tool, so that a special and expensive conventional heating device is not required. The present invention was completed by investigating that the backlash other than the backlash located in the heated tip portion is not softened and does not cause damage to its quality.

[0008] Further, if a support base for supporting the softened rattle aperture extruded from the extrusion nozzle port is provided at the tip, it is possible to prevent the extruded softened rattle aperture from falling and becoming unusable. After being extruded, the time it takes to maintain the state heated by the heat of the support and to solidify becomes longer, and a temperature higher than the softening temperature of the stored rattle aperture by a predetermined temperature. If the reversible temperature indicator is provided at the tip, it indicates that the reversible temperature indicator causes the backlash stored in the tip to reach a temperature higher than the softening temperature by a predetermined temperature or more. Not only can it be possible to grasp the appropriate heating and softening of the rattle aperture, but this thermometer is also semi-permanent. It is also of the investigation is an economical can be used to.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a syringe for accommodating backlash according to the present invention.
FIG. 1 is a perspective view showing one embodiment of a rattle-perch storage syringe according to the present invention in which the syringe outer cylinder is made of a transparent material, and FIG. 2 is a sectional view taken along the center line of FIG.

In the drawings, reference numeral 1 denotes a plunger 5 made of an arbitrary material such as metal, plastic, or glass.
Stainless steel (thermal conductivity: 16.3 W /
m · K, melting point: about 1,400 ° C) and titanium (thermal conductivity:
17 W / m · K, melting point: about 1,820 ° C.) or a metal such as fluoroethylene polymer (thermal conductivity: 0.25 W / m)
・ K, melting point: about 300 ° C.), glass (thermal conductivity: 0.80 to 0.70 W / m · K, melting point: about 1,300 to 1,500 ° C.), and ceramic (for example, In the case of mullite, the thermal conductivity is as low as 20 W / m · K or less, as in the case of mullite, which has a thermal conductivity of 2.3 to 2.9 W / m · K and a melting point of 1,500 ° C. And the melting point is 25
A syringe outer cylinder made of a heat-resistant material having a temperature of 0 ° C. or higher. In particular, the syringe outer cylinder 1 is made of transparent glass so that the backlash 6 housed in the syringe outer cylinder can be visually checked. It is preferred that

At the distal end of the syringe barrel 1, a reversible temperature indicator 4 indicating that the temperature has become higher by a predetermined temperature than the softening temperature of the backlash 6 housed in the syringe barrel 1. Preferably, it is provided.

Here, the syringe outer cylinder 1 has a thermal conductivity of 20
The reason why the material must be composed of a material having a melting point of not more than W / m · K and a melting point of not less than 250 ° C.
If it is larger than m · K, when the distal end of the syringe barrel 1 is heated to a temperature higher than the softening temperature of the backlash 6 by a predetermined temperature or more (usually in the range of 40 ° C. to 90 ° C.), the entire syringe barrel 1 becomes When the syringe barrel 1 is heated to a temperature close to that, it becomes difficult not only to operate the syringe barrel 1 by hand, but also the whole backlash 6 housed in the syringe barrel 1 is softened. This is because it is not possible to prevent a phenomenon that the remaining rattle aperture 6 is changed in quality when the entire rattle aperture 6 stored in the syringe barrel 1 is not completely used at once, and When the melting point is lower than 250 ° C., the distal end of the syringe barrel 1 is heated by a simple heating tool using a flame such as a gas burner or an alcohol lamp attached to a medical chair of a dental clinic. Syringe barrel 1 which is heated when the
Is melted so that it cannot be used for use.

As described above, the syringe barrel 1 is made of a material having a thermal conductivity of 20 W / m · K or less and a melting point of 250 ° C. or more, so that a gas burner attached to a medical chair of a dental clinic can be provided. By heating the distal end of the syringe barrel 1 directly for a short time with a simple heater using a flame such as a flame or an alcohol lamp, it is possible to heat the syringe barrel 1 to a temperature higher by a predetermined temperature than the temperature at which the backlash 6 is softened. It does not require a heating time of 10 minutes as in the method of heating through air with poor heat transfer like the special and expensive heating device of the above, so that the additional backlash 6 is immediately softened and extruded and refilled into the root canal. It is possible to prevent clinical rework, and materials with such low thermal conductivity generally have a large specific heat at a constant pressure, so that they are stored once. When the dentist is heated to a temperature higher than the softening temperature of -6 by a predetermined temperature, the temperature does not decrease so easily that the dentist can maintain the temperature until the injection of the rattle aperture 6 into the root canal of the patient is completed. There are advantages too.

Then, the backlash 6 housed in the inside of the plunger 5 is pushed into the extrusion nozzle port 2 at the tip.
At the tip of the syringe outer cylinder 1 extruded from the nozzle, if the support base 3 for supporting the softened rattle aperture 6 extruded from the extrusion nozzle port 2 is provided, the extruded softened rattle aperture 6 falls and is used. It is preferable because it can prevent the state where the support table 3 becomes impossible, and after the extrusion, the time until the solidified state is maintained by maintaining the state heated by the heat of the support base 3 is preferable.

Further, the temperature indicating material 4, which is preferably provided at the distal end of the syringe outer cylinder 1, and indicates that the temperature has become higher than the softening temperature of the backlash 6 to be stored by a predetermined temperature, must be reversible. The reason is that if not reversible, the heating material 4 loses its function in one heating, so that it is not only uneconomical, but also the temperature in the distal end portion of the syringe barrel 1 becomes lower than the softening temperature of the backlash 6. The use of the reversible temperature indicator 4 prevents the occurrence of a phenomenon that the temperature indicator 4 cannot be visually confirmed that the temperature indicator 4 is no longer suitable for use.
Can be extruded from the extrusion nozzle port 2 in a stable state.

[0016]

[Example] (Example 1) Outer diameter 6.5 mm, inner diameter 4.0 mm, length 75
A syringe for storing a rattle aperture as shown in FIGS. 1 and 2 was provided, which was provided with a support base for supporting a softened rattle aperture that was extruded at the tip of a syringe outer cylinder made of stainless steel (SUS 304) having a diameter of mm. The syringe for storing the backlash is filled with a backlash (softening temperature: 55 ° C., manufactured by GC Corporation), and the backlash filled with a plunger made of plastic (polyether sulfone) is located in the distal end portion of the syringe barrel. After pressing, the tip of the syringe is roasted for 10 seconds with the flame of a lighter-type heating tool (trade name: Chakkaman) while rotating the syringe barrel and immediately extruded with a plunger, suitable for the intended use. The rattle aperture having the above temperature and softened state could be easily extruded from the syringe.

(Embodiment 2) The syringe barrel of the syringe for storing the backlash having the dimensions shown in Embodiment 1 is made of glass, and a reversible temperature indicator having a discoloration temperature of 60 ° C. ± 2 ° C. Product name: Thermopaint R-6)
Was prototyped. The inside of the syringe for storing the backlash is filled with a backlash (softening temperature: 55 ° C., manufactured by GC Corporation), and the backlash filled with a plunger made of plastic (polyether sulfone) is located in the distal end portion of the syringe barrel. After extruding, the tip of the syringe was roasted for 15 seconds with the flame of a lighter-type heating tool (trade name: Chakkaman) while rotating the syringe barrel, and the temperature indicating material changed from red to black. Where you stopped and immediately pushed out with a plunger,
The rattle aperture having a temperature and a softened state suitable for the purpose of use could be easily extruded from the syringe.
In addition, the time during which the color tone of the temperature indicating material is maintained at black is 10
For 0 seconds, the backlash having a temperature and a softened state suitable for the purpose of use could be continuously extruded and used.

(Embodiment 3) The syringe barrel of the syringe for accommodating the backlash having the dimensions shown in Embodiment 1 was made of ethylene tetrafluoride polymer, and a reversible temperature indicator (manufactured by NOF Engineering Co., Ltd.) was provided at the tip. , Product name: Digital Thermo Tape D-50,
(Temperature range: 50 to 100 ° C., temperature pitch: 5 ° C.) were manufactured as trial products. In this syringe for storing backlash, a backlash (manufactured by GC Corporation, softening temperature: 55 ° C)
And then extruded with a plunger made of plastic (polyethersulfone) so that the backlash is positioned inside the tip of the syringe barrel, and then rotate the syringe barrel while turning the unit burner (GC). The tip was burned with a flame for 6 seconds, and when the temperature indicator reached 65 ° C, the heating was stopped and immediately extruded with a plunger to easily produce a rattle with a temperature and softening state suitable for the intended use. It could be extruded from the syringe. Also, during the time of 80 seconds, which is the time until the temperature of the temperature indicating material reaches 55 ° C., the backlash having a temperature and a softened state suitable for the purpose of use could be continuously extruded and used.

Comparative Example 1 A plastic syringe (made by Terumo Corporation) made of plastic (polypropylene) was charged with a gutta percha (made by GC Corporation), and the tip was burned with a lighter flame and heated. The part began to melt, and the internal rattle apertures softened together and could not withstand use.

(Comparative Example 2) A syringe barrel made of aluminum was filled with a backlash, and the syringe was heated by burning with a lighter flame for 13 seconds, and the heating was stopped and immediately extruded with a plunger to soften. The rattled aperture having the state could be easily pushed out from the syringe, but the temperature of the syringe barrel was high and it was difficult to hold the syringe barrel, and the backlash remaining in the syringe barrel without being pushed out Had changed in quality and became unsuitable for future use.

[0021]

As described in detail above, the rattle-perch storage syringe according to the present invention has various effects as listed below, and is of great value contributing to the dental field. It is. A syringe outer cylinder in which the platter is housed by a plunger and extruded from an extruding nozzle port at the tip has a thermal conductivity of 20 W / m · K or less and a melting point of 2 W / m · K.
Because it is composed of a material of 50 ° C. or higher, it does not soften even when the tip is heated with a flame, and the temperature of only the heated portion rises and the temperature of the unheated portion hardly rises. The time required for softening the rattle aperture used is short. Since the syringe barrel is made of a material with a melting point of 250 ° C or higher, only the tip is heated to a suitable temperature by short-time heating with a gas burner or alcohol lamp commonly used in dental clinic chairs. It is easy to reheat and it is easy to reheat.Moreover, it takes up space as before, and not only causes problems such as the power cord obstructing the medical treatment, but also the filling of the root canal with filling of the rattle aperture is not completed. If the syringe barrel cools down and the backlash hardens, it takes about 10 minutes to re-heat, so there is a problem that the filling operation needs to be performed again. As a result, it is possible to significantly reduce clinical costs, and the dentist can concentrate on the treatment with confidence. Since the syringe barrel is made of a material having a thermal conductivity of 20 W / m · K or less, when the distal end is heated, only the appropriate amount of rattle aperture in the heated distal end for performing dental treatment is softened. The syringe is heated to a temperature higher than the predetermined temperature by a predetermined temperature, and there is no danger of deterioration due to the fact that the back aperture in the syringe barrel outside the unheated distal end portion does not reach the softening temperature. If the tip is provided with a support for supporting the softened rattle aperture extruded from the extrusion nozzle port, the extruded softened rattle aperture will not fall down and become unusable, and the supported softened rattle aperture will not be used. Is supported by the heated support table, so that it does not harden in a short time and becomes unusable. And, if a reversible temperature indicating material indicating that the temperature has become higher by a predetermined temperature than the softening temperature of the stored backlash is provided at the tip, the backlash used to be extruded is heated to a suitable use temperature. It is very easy to know whether or not it is operating and whether it is maintained at an appropriate temperature for use. It is also possible to prevent the occurrence of a phenomenon in which the quality of the backgutter, which must be maintained for ten years or more after filling the root canal by heating the aperture to an excessively high temperature, is severely damaged.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a syringe for housing a rattle aperture according to the present invention in which a syringe outer cylinder is made of a transparent material.

FIG. 2 is a sectional view taken along the center line of FIG. 1;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 syringe outer cylinder 2 extrusion nozzle opening 3 support 4 reversible temperature indicating material 5 plunger 6 rattling

Claims (3)

[Claims] 1. A rattle aperture (6) housed therein by a plunger (5) is pushed out at an extruding nozzle port (2).
The syringe barrel (1) extruded from the
A syringe for accommodating a backlash, comprising a material having a melting point of not more than W / m · K and a melting point of not less than 250 ° C. 2. The syringe according to claim 1, further comprising a support (3) for supporting the softened rattle aperture (6) extruded from the extrusion nozzle port (2). 3. A reversible temperature indicator (4), which indicates that the temperature of the stored backlash (6) is higher than a softening temperature by a predetermined temperature, is provided at the tip.
The syringe for storing a rattle aperture described in 1.