JP2005169034A - Near infrared irradiation type polymerizer for dentistry - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a polymerizer using a near infrared ray for curing a resin material. <P>SOLUTION: The near infrared irradiation type polymerizer for dentistry is characterized by polymerizing a thermosetting resin with the near infrared ray emitted from a near infrared irradiation part in the polymerizer for curing a shape-imparted thermosetting resin. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

A polymerization apparatus using near infrared rays as a method of curing the resin material.

In dentistry, conventionally, a method of applying a function restoring device of various shapes according to the condition in the oral cavity of a patient and the purpose of treatment is heavily used. In carrying out this method, a function restoring device is formed into a target shape using a material having deformability such as fluidity, plasticity, and spreadability, and then cured into that shape. After that, adjustment work is performed as necessary, and it is used for treatment such as recovery and restoration of functions related to the oral cavity and jaw joint of the patient, and regeneration guidance of living tissue.
In the case of a resin material, the shape is fixed by curing by light irradiation or polymerization by heating.
When creating a function restoration device for use by the technician in the oral cavity, a photopolymerizer for a technician or a thermal polymerizer equipped with any light source that generates light including the wavelength range necessary to cure these photocurable materials. A heated polymerizer for curing the polymerizable material is essential.

These resin materials have been rapidly used in recent years because of their high aesthetics not found in metals and their excellent operability compared to porcelain that must be fired and built in anticipation of shrinkage. Has become popular.

In addition to these advantages, the widespread use of resin materials contributes to the great advantage that the means for fixing the shape is simple and the working time is shorter than the work using metal or porcelain. The resin material was also cured by heating at the beginning, and there was no significant advantage in terms of working time. However, with the progress of subsequent research, workability will be improved when a chemical polymerization type that starts a polymerization reaction when a powder material and a liquid material are kneaded and a photopolymerization type that polymerizes and cures when irradiated with light having a specific wavelength are developed. Has improved dramatically and has spurred the spread.

Currently, resin materials are polymerized by photopolymerization, chemical polymerization, or a combination of these two methods, except for denture base resins, where dewaxing is widely used and heat polymerization with hot water is widely used. Mold materials are widely used. However, in the chemical polymerization type, since it is necessary to separate the catalyst system until it is cured, mixing and kneading are required, and it is often not used in some cases.

The polymerization apparatus is also improving. With the recent spread of photopolymerizable materials, the progress of photopolymerization equipment is remarkable. In recent years, improvements in photopolymerization devices such as an increase in the amount of emitted light and a reduction in the time required for polymerization have progressed, and some devices that polymerize resin materials in the oral cavity can be completed in about 5 seconds. . Even in the apparatus used in a technical laboratory, the polymerization is completed in a few tens of seconds.

As described above, the advancement of both the material and the polymerization apparatus brought two major advantages of improved operability and shortened working time. As a result, photopolymerizable materials have been frequently used in dental clinics.

Thus, although it is a photopolymerization type resin material widely used at present, there are some serious problems in actual use.

The photopolymerization type material activates the photopolymerization catalyst contained in the material by light and causes a polymerization reaction. Therefore, when polymerization is attempted by light irradiation, there is a problem that only a portion where light reaches can be polymerized. is there. That is, in the light irradiation by the photopolymerizer, there is a limit to the distance that light can reach from the surface of the material, and thus there is a limit to the thickness that can be cured at one time. Therefore, when producing a thick prosthesis using a material with a low curing depth using a photopolymerizer, it is cumbersome and long, such as laminating and laminating and repeating polymerization by light irradiation in several layers. There is a problem that it is forced to work that requires. The distance from the polymerizable surface is referred to as the curing depth. The more opaque the color and the darker the color tone, the lower the curing depth value.

In order to increase the curing depth, a device has been devised to increase the amount of light that can be output from the photopolymerizer. For example, Japanese Patent Application Laid-Open No. 9-168551 discloses a photocuring apparatus in which a condensing lens is provided between a light source and a light entrance to improve the light emission amount. However, even if the light emission amount is increased by such a device, it is difficult to completely eliminate the influence of light shielding due to the opacity and color tone of the polymer, and it is difficult to eliminate the limitation of the curing depth.

In the case of a shape having an undercut portion that is not directly exposed to light, an operation such as irradiating light by changing the direction of the prosthesis is necessary. If it can be cured by irradiating light from any direction, such as an inlay, a cured prosthesis is produced even if such a complicated operation and a long-time operation are required. be able to.
A box-type photopolymerizer is provided with a rotatable stage in which a polymer is placed in the center, and a certain area on the stage is irradiated with light from as wide an angle as possible so as to reduce the blind spot as much as possible. A plurality of lamps and light emitting diodes are installed at various angles, a reflection plate for reflecting light around the polymerization stage is attached, and a coating for reflecting light is applied.
For example, in Japanese Patent Laid-Open No. 2002-186632, a device is devised in which a light source is arranged so that light strikes a turntable at an angle of 10 degrees to 19 degrees with respect to a horizontal plane of the stage, thereby reducing a portion where light does not strike. It is shown. In another example, Japanese Patent Application Laid-Open No. 2003-61983 uses a plurality of light sources to form a plurality of light source groups, and each light source group is installed so as to irradiate different areas, and the device capable of irradiating light is devised. Illumination devices are shown. However, for example, in cases such as pontic hole filling and long span bridge cases where the dental arch has a strong curvature, there are areas where light cannot reach even with these devices, resulting in poorly polymerized or unpolymerized parts. There was a problem that there was a high risk of doing.

In addition, when the same resin material is polymerized by light irradiation and the one polymerized by applying heat is compared, the photopolymerized one tends to be inferior in physical properties to the one polymerized by heat. This tendency is that when a prosthesis cured by photopolymerization is present in the oral cavity for a long time, the stability of the shape and dimensions may be inferior to that of a material cured by thermal polymerization, and the amount of water absorption increases. There is a possibility that more eluate may be eluted, color stability may be inferior, and there is a problem that it may be one of the causes of being easily destroyed due to a tendency to deteriorate physical properties.

In addition, since polymerization with a photopolymerizer has the property of being polymerized and cured from the light-irradiated side, each layer that needs to be reliably polymerized and cured, even in the case of a thick prosthesis, even if laminated There is a serious problem that unpolymerization is likely to occur in the portion where the contact is made.

Further, a visible light irradiation part such as a halogen lamp used in a normal photopolymerizer has a color temperature of 5900 in order to emit visible light having a wavelength necessary to excite a photopolymerization catalyst blended in an object to be polymerized. It was necessary to raise the temperature to around 0 ° C. For this reason, a large amount of power energy is required during light irradiation, and a large amount of heat is generated that is not directly related to polymerization, which is wasteful and inefficient from the viewpoint of resource saving.

In order to solve these problems, it is well known that the use of heat polymerization is effective. If it is a heat polymerization type material, the problems peculiar to the above-mentioned photopolymerization type material can be almost solved. However, in the use of the heat polymerization method material, since a temperature of about 60 ° C. to about 130 ° C. is required at the time of polymerization, a heat polymerization device is necessary. For example, a heat polymerization apparatus called a pine wind pressure polymerization apparatus has been commercially available. This apparatus is a heating polymerization apparatus in which the pressurization time is controlled by a timer, and a polymer can be placed in the container and heated at a desired temperature for a necessary time for polymerization. Such a heat polymerization apparatus has good polymerization performance, but there are some major problems mainly in terms of workability as follows. The heating polymerization apparatus is basically a closed container, and is cured by a procedure in which a prosthesis to be polymerized is placed in the container, the lid is closed, and heating is performed for a predetermined time. In using the heating polymerization apparatus, it is necessary to turn on the power of the heating polymerization apparatus in advance and raise the temperature inside the apparatus to a temperature necessary for polymerization. Such advance preparation often requires 10 minutes or more.

Further, since a gas such as air or an inert gas having a very small heat capacity is used as the heating medium, it is necessary to put the prosthesis to be polymerized in the polymerization vessel and close the lid. If the lid is left open, the heated gas flows out of the vessel, the temperature in the polymerization vessel rapidly decreases, and it becomes impossible to heat the prosthesis so that it is polymerized. It takes several minutes to several tens of minutes after the sealing until the temperature in the furnace can be polymerized again. Photopolymerization is completed in about 10 seconds to several minutes, while heat polymerization requires several minutes to several tens of minutes. When manufacturing a front crown, etc., a prosthesis is manufactured through many steps in order to reproduce the color tone and internal structure, but it is necessary to perform polymerization or temporary polymerization at each step to obtain the desired shape. Therefore, in the case of heat polymerization, each step requires several minutes to several tens of minutes each time, and there is a problem that a long time of work is required.

For some heating operations, a blower with a dryer-like structure may be used, but since it is only used for pre-polymerization of resin materials, there are significant demerits for installation when considering the space situation of the laboratory. There is a problem. For example, in tentative polymerization using a pine wind blower, it is necessary to hold the prosthesis to be cured by polymerization over a hot air outlet for several tens of seconds with a tweezer etc., but the position is maintained for several tens of seconds against the hot air pressure. This requires considerable labor, and since the work is performed for several tens of seconds in a high temperature environment, there is a problem in that other work is dangerous during pre-polymerization and the work efficiency does not increase.

JP-A-9-168551 JP 2002-186632 A JP2003-61983

In this way, photopolymerization has good operability and short polymerization time, but there is a problem with physical properties and curability, and heat polymerization has excellent physical properties and curability, but operability is bad, and polymerization requires a long time. was there. The present invention solves these problems by developing a novel polymerization apparatus.
In the present invention, by applying near-infrared rays to such a problem, heat energy necessary for polymerization is added with extremely high efficiency, and even heat-polymerizable resin materials and photopolymerizable resin materials can be cured sufficiently in a short time. To solve the above-mentioned problems.

The present invention is a polymerization apparatus used in the jewelry industry, the dental industry, and the like using near infrared rays to cure a curable material, and also relates to a heat dissipation method for the polymerization apparatus and a control method for the polymerization apparatus.
In particular, the present invention is a polymerization apparatus that irradiates and cures a near-infrared ray to a curable material having thermosetting properties within a range of 50 to 300 ° C. in the dental technical field. It relates to a control method.
The polymerization apparatus of the present invention can be polymerized as long as it is a resin material having a thermosetting property within a range of 50 to 300 ° C. even if it is a method such as chemical polymerization, thermal polymerization, ultraviolet polymerization or ultrasonic polymerization.

The present invention provides a dental near-infrared irradiation type polymerization apparatus characterized in that a thermosetting resin is polymerized in the near-infrared ray irradiated from the near-infrared ray irradiation unit in a polymerization apparatus for curing the thermoset resin provided with a form. is there.
The present invention is the dental near-infrared irradiation type polymerization apparatus according to claim 1, wherein the near-infrared irradiation unit is composed of a halogen lamp, a metal halide lamp or a xenon lamp.

The present invention is a dental near-infrared irradiation polymerization apparatus characterized in that, in a near-infrared irradiation polymerization apparatus, the temperature of an irradiated object rises to 50 to 300 ° C. by the irradiated near infrared light.
The present invention relates to a near-infrared irradiation type polymerization apparatus, wherein the near-infrared wavelength irradiated from the near-infrared radiation portion is 0.7 to 4 μm and has a peak in a wavelength region of 0.8 to 2 μm. This is a near infrared irradiation type polymerization apparatus.
The present invention is a dental near-infrared irradiation type polymerization apparatus characterized in that 70% or more of the electric power supplied by the near-infrared ray emitting section is emitted as infrared rays.
The present invention is a near-infrared irradiation type polymerization apparatus, wherein the near-infrared irradiation unit is a heating wire heater, a halogen heater, and / or a light emitting diode that emits near-infrared light.
The present invention is a dental near-infrared irradiation type polymerization apparatus characterized by emitting near-infrared rays as pulses.

BEST MODE FOR CARRYING OUT THE INVENTION

A halogen lamp is preferably used as the lamp for irradiating near infrared rays.
Since the near-infrared irradiation type polymerizer of the present invention emits near-infrared light having a peak wavelength of 0.8 to 2 μm, the color temperature of the near-infrared irradiation part is set to about 1200 ° C. Even when a halogen lamp is used for the near-infrared ray irradiating portion, the amount of visible light generated is small at a color temperature of about 1200 ° C., and the voltage and the amount of electric energy flowing through the halogen lamp can be reduced to half or less. In other words, it is completely different from conventional usage, and it does not illuminate with visible light, but exclusively emits near infrared rays.

In order to control the color temperature, overheat the reflective shade, and control the temperature of the polymer, the near infrared rays are not only emitted continuously, but also in a pulsed manner or by a combination of continuous and pulsed radiation. You may go.

The rated power amount of the lamp is desirably 15 W to 1200 W. More preferably, it is 25W to 1000W. More preferably, it is 50W to 500W.

The polymerization apparatus of the present invention can be implemented in either a box type or an open type.

The box type has the same shape as the conventional heating polymerization apparatus and photopolymerization apparatus, and has a structure in which a near-infrared irradiation unit is installed in place of the heating heater and the light irradiation lamp. In the case of the box type, near infrared rays can be reflected in the container, so that conventional polymerizers can be used for the polymer having a size far exceeding the spot size of the near infrared rays emitted from the near infrared irradiation part. There is an advantage that sufficient polymerization can be caused in a shorter period of time.

The open type has a structure in which a near-infrared light emitting unit is installed on a stand, and has a compact shape that can be placed on a work table. In this type, a near-infrared irradiation switch with an easy-to-operate shape that can be operated simply by lightly pressing with a hand holding a tweezer sandwiching the polymer to be polymerized can be freely provided in an easy-to-work location. It is also possible to provide a guide plate on the side opposite to holding the tweezer so that the point where the near infrared rays converge can be easily understood. It is also preferable to provide a pilot lamp indicating that near-infrared irradiation is being performed at a position where it can be easily confirmed. With such an open type, work such as opening and closing the lid and setting the polymer to be placed on the rotary stage is not required, so polymerization work can be performed very efficiently, reducing worker fatigue, improving yield, and improving product quality. There is an advantage to bring.

When the rated power of the near-infrared irradiation part is large, the calorific value of the lamp also tends to increase, but if this heat is transmitted to the reflective shade, the reflective shade may be burned out or deformed. It is preferable to install a cooling device as appropriate.

As the cooling device, a method using an electric fan, a method using a Peltier element, a method of circulating cooling water inside the shade, and the like are preferably used. Particularly preferred is a method of circulating cooling water inside the shade.

The control unit that controls the irradiation intensity of the near infrared rays has a function of controlling the electric power applied to the near infrared irradiation lamp so that the polymerization of the resin material is sufficiently performed and the temperature does not rise excessively. The main control parameters are temperature setting and time for holding the set temperature. When the user sets these two parameters, or sets the desired temperature, the control unit determines the appropriate voltage and current to supply power to the near infrared illumination lamp. Alternatively, appropriate power supply is performed so that energy is intermittently supplied by irradiating near infrared rays in pulses.

The temperature sensor is used to detect the temperature of the prosthesis irradiated with near-infrared rays, transmit the detected temperature to the control unit, and feed back to control of the electric energy. This action prevents an excessive temperature rise of the prosthesis and burning accompanying it. As the temperature sensor, an infrared sensing method or a method using a thermocouple is preferably used. In particular, a method of fixing the thermocouple to the prosthesis with a clip or the like is preferably used.

It is preferable to start and end the near-infrared irradiation by operating an irradiation switch connected to an automatic temperature control device. It is further preferable that the irradiation is automatically ended when a preset time has elapsed by a timer built in the control unit after the irradiation switch is operated to start irradiation of near infrared rays. In addition to operating the irradiation switch at hand, a method of operating with a foot switch using a foot switch, a method of providing a plate-like switch that can be pushed by the body part of a tweezer with a prosthesis sandwiched in the vicinity of the near infrared focus, or By using a thermal sensor, infrared sensor, etc. as a proximity switch, you can freely select a method that makes it easy to perform work, such as starting up near-infrared irradiation simply by holding a polymer on the near-infrared irradiation part. Can be used.

The invention's effect

Polymerization by near-infrared irradiation with this apparatus has the following effects. In the conventional heat polymerization method, heat energy is transmitted by convection and conduction of a medium gas, but in this method, energy is transmitted by near infrared radiation. For this reason, since the transmission of energy to the polymer is achieved with high efficiency, there is an advantage that sufficient energy saving can be expected.

In addition, since the polymerization method using this apparatus irradiates the polymerized material in a light-like state, the temperature of the polymerized material rises very quickly even in an open system, and it is possible to cause a sufficient polymerization curing reaction. Have This advantage is manifested without any change even if an air flow exists between the near-infrared irradiation part and the polymer.

In the polymerization system using this apparatus, the operation time can be kept constant, and stable polymerization curability can be obtained.

There is no problem that there is a limit of the curing depth found in photopolymerization in the polymerization method with this device. When near infrared rays hit the polymer, heat is transmitted to the polymer itself, and sufficient heat energy is also contained inside. Therefore, even if it is a part away from the surface, the part that is undercut and does not receive direct near-infrared rays is cured and cured in the same manner as in the heat polymerization.

For the same reason, the transparency and color tone of the polymer do not affect the polymerizability, so that there is an advantage that a complicated operation such as repeated polymerization is not required.

In the polymerization method using this apparatus, since the polymerization is based on heat, there is an advantage that it is possible to almost eliminate the problem that unpolymerized or poorly cured portions as seen in a cured product by photopolymerization are likely to occur. Therefore, compared to a cured product by photopolymerization, the stability of shape and dimensions is excellent, the amount of water absorption is smaller, the amount of eluate is also smaller, the stability of color tone is excellent, and the physical properties are further improved. It has the great advantage that it is difficult to lower and can be used for a longer period in the oral cavity.

In the polymerization method using this apparatus, a laminating operation as in the photopolymerization method is unnecessary in principle, so that the problem of generation of an unpolymerized layer between layers can be eliminated.

The polymerization method according to the present invention is characterized in that the polymerization and curing can be completed in a very short time as compared with the conventional heat polymerization method, and the length of operation time, which has been a major problem in heat polymerization, can be solved. The polymerization time of this method has an operational advantage that it can be made sufficiently shorter than the photopolymerization method depending on the application case and the operation method.
The replacement life of the near-infrared irradiation unit is 2 to 10 times longer than that of conventional photopolymerizers, so the replacement work frequency of the near-infrared irradiation unit is reduced and the maintenance cost can be reduced. Have.

As described above, the dental near-infrared irradiation type polymerization apparatus of the present invention achieves both good operability of the photopolymerization method and reliable polymerization result of the heat polymerization method, and relates to the physical properties and curability of the photopolymerization method. There is an effect that it is possible to solve the problem and the problem that the conventional heat polymerization method has poor operability and a long time for polymerization.

The dental near-infrared irradiation type polymerization apparatus according to the present invention will be described in detail below.
A dental near-infrared irradiation type polymerization apparatus of the present invention comprises a point condensing type, line condensing type, or parallel irradiation type lamp capable of irradiating near infrared rays in a wavelength range of 0.7 μm to 1.8 μm, and this lamp. A near-infrared irradiation unit composed of reflective shades for directing the near-infrared rays emitted from the beam in a certain direction and converging, diffusing or illuminating as necessary, and holding them at a fixed angle at a fixed position Stand, a cooling device for cooling the near-infrared ray irradiation unit, a control unit for controlling the intensity of the near-infrared ray, a temperature sensor for measuring the temperature of the prosthesis, and a temperature at a location necessary for cooling control. Consists of a temperature sensor to measure.

The structural example of a near-infrared irradiation apparatus is shown.
As the near-infrared irradiation unit, a near-infrared heat beam point condensing type HYS-20W (10V85W) manufactured by Hibec Co., Ltd. was used. An automatic temperature controller HB-150 manufactured by the same company was used as a controller for controlling the output of the near infrared irradiation unit. Further, a cooling unit for cooling the reflection shade of the near infrared irradiation unit was composed of a commercially available water tank with a capacity of 20 liters and a pump, and the hose was connected so that the cooling water circulated between the reflection shade and the water tank.
The near-infrared irradiation unit was installed on a technical work desk using a simple stand, and the position and orientation were adjusted so that the resin material was easily polymerized. The automatic temperature controller and water tank were installed in an unobstructed area under the technical work desk. A thermocouple for measuring the temperature of the cooling water is provided at the part where the cooling water comes out of the reflection shade. The flow rate was adjusted so that the cooling water temperature immediately after cooling the reflective shade would be 85 ° C. or lower.
The upper surface of the water tank was an open type, and an electric fan was installed, and the position and orientation were adjusted so that the cooling air sufficiently hit the cooling water surface in the water tank and lowered the water temperature.

The near infrared irradiation type polymerization apparatus of the present invention can be suitably used for various applications in dentistry in addition to the polymerization of the original resin material.

For example, a wax heating device can be used as an alternative to a gas burner used in wax-up, which is a typical technical work. There is no combustion of gas, so the risk of ignition to organic solvents is reduced, the degree of oxygen reduction and carbon dioxide increase in the air is significantly reduced, and soot generation is also reduced. Contribute to improvement.

A photopolymerizable composite resin was polymerized using the near infrared irradiation apparatus described in the detailed description.
Dentsu paste (color tone A3) of hard resin “Solidex” for photopolymerization type crown made by Matsukaze Co., Ltd. is filled into a hollow metallic ring and molded into a cylindrical shape with a diameter of 10mm and a thickness of 2mm for comparison test. did.
In Example 1, the positions of the test piece and the near-infrared irradiation unit were adjusted and installed so that the spot diameter of the test piece was 10 mm. The infrared irradiation apparatus had an upper limit temperature of 120 ° C., and stopped supplying power when the temperature exceeded 100 ° C. The temperature of the test piece continued to rise after the power supply was stopped and finally reached 120 ° C. It took 5 seconds to reach 100 ° C. from room temperature, and the time to reach 120 ° C., the peak after the power supply was cut off, was 3 seconds.
As a visible light irradiator for comparison 1, a Matsukaze light irradiator “Soridelite” was used. The comparative object 1 was installed by adjusting the position so that the end face from which the light at the end of the light guide of the light irradiator comes out is in close contact with the test piece.
The light irradiation start switch of the light irradiation unit was pressed. After 30 seconds, the light irradiation was automatically terminated by an internal timer. A “Matsukaze pressure heating polymerizer” manufactured by Matsukaze Co., Ltd. was used as the heating polymerizer of Comparative Control 2. The furnace temperature of the heating polymerizer was previously heated to 120 ° C. The lid of the polymerization vessel was opened and the test piece was quickly placed in the furnace, and the lid was quickly closed again and sealed. By this operation, the furnace temperature temporarily decreased to 89 ° C. It took 4 minutes for the furnace temperature to reach 120 ° C again. It took 42 seconds for the temperature of the test piece to reach 120 ° C. The test piece was anchored for 10 minutes after the temperature reached 120 ° C.

The results are shown in Table 1.

According to the near-infrared irradiation type polymerizer of the present invention, the photocurable resin material showed a polymerizability equivalent to that obtained by tethering the heat polymerization of the comparative object 2 for 10 minutes in a shorter time than the photopolymerizer of the comparative object 1.

Example 2
A heat-curing denture base resin was polymerized using the near infrared irradiation apparatus described in the detailed description.
A heat-curing denture base resin “Urban” (color tone # 56) manufactured by Matsukaze Co., Ltd. was filled into a hollow metal ring and made into a cylindrical shape having a diameter of 10 mm and a thickness of 4 mm and subjected to a comparative test.
The infrared irradiation apparatus set the temperature to 100 ° C., and stopped supplying power to the irradiation unit when the temperature exceeded 100 ° C. The voltage during power supply was 100 V and the current was 0.1 A.
Visible light irradiator for comparison: Matsukaze Light Irradiator Grip Light II

The results are shown in Table 2.

Since the material used was a material for heat polymerization, it was not polymerized by light irradiation. In the near-infrared irradiation, the material irradiated with the near-infrared rays polymerized even though the ambient temperature was room temperature.

Cross section of a box-type near infrared irradiation polymerization equipment Cross section of open type near infrared irradiation polymerization equipment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Near-infrared irradiation part 2 Operation panel 3 Control circuit 4 Motor 5 Power supply part 6 Rotating stage 7 Reflecting shade 8 Hinge 9 Near-infrared irradiation part replacement door 10 Extraction door handle 11 Extraction door 21 Near-infrared irradiation part 22 Switch board 23 Micro switch 24 Translucent protective plate 25 Operation panel 26 Control circuit 27 Power supply 28 Free arm

Claims (6)

A dental near-infrared irradiation polymerization apparatus, wherein a thermosetting resin is polymerized by near-infrared rays irradiated from a near-infrared ray irradiation unit in a polymerization apparatus for curing a thermosetting resin having a form imparted thereto. 2. The dental near-infrared irradiation type polymerization apparatus according to claim 1, wherein the near-infrared irradiation unit comprises a halogen lamp, a metal halide lamp, a xenon lamp, a heating wire heater, or a light emitting diode that emits near-infrared light. The near-infrared irradiation type polymerization apparatus according to claim 1 or 2, wherein the temperature of the irradiated object rises to 50 to 300 ° C by the irradiated near infrared light. In the near-infrared irradiation type polymerization apparatus, the near-infrared wavelength irradiated from the near-infrared radiation part is 0.7 to 4 μm, and has a peak in a wavelength region of 0.8 to 2 μm. 4. A dental near-infrared irradiation polymerization apparatus as described in 3. The dental near-infrared irradiation type polymerization apparatus according to claim 1, wherein 70% or more of the electric power supplied by the near-infrared radiation unit is emitted as infrared rays. 6. The near-infrared irradiation type polymerization apparatus for dental use according to claim 1, wherein the near-infrared radiation is emitted as a pulse.

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