JPH07116176A - Dental impression syringe - Google Patents

Abstract

PURPOSE:To provide a syringe, which can take an impression easily, properly and precisely by covering the outside of the syringe with a temperature sensitive color changing agent. CONSTITUTION:A temperature sensitive color changing agent which changes color at 47 deg.C is added to methyl methacrylate butyl acrylate copolymer resin varnish as a coating vehicle to be mixed uniformly. The coating is applied to the surface of a dental impression syringe 1 and is dried to form curing coating layers of 1a to 1d. The syringe 1 is filled with an agar impression material 2 and is inserted into the heat insulating hole of a constant temperature heater shown in the syringe 1 and a temperature is raised to the fusion temperature and is kept during certain time. The impression agent 2 is cooled to the conservation temperature and is kept at the temperature. In order to take the impression of a patient's cavity, the syringe 1 is taken out of the agar conditioner. The agar impression material 2 is pushed out from a nozzle on the top of the syringe 1 and is supplied to the cavity of an impression part to take the impression. This process makes the precision of an impression high and a dental impression taking successful.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dental impression syringe, and more particularly to a dental impression syringe in which the temperature of the agar impression material in the dental impression syringe can be easily discriminated.

[0002]

2. Description of the Related Art Dental impression materials used in the medical field such as the dentistry field must be capable of obtaining an impression by gelling at a temperature equal to or lower than the living body temperature such as the temperature in the mouth. On the other hand, it must be a fluid sol at a relatively high temperature that does not irritate the tissues in the mouth so much that it can well flow in and reproduce all the necessary fine parts. Agar has been used as a base for reversible aqueous colloidal impression materials as satisfying such conditions. Thus, conventional agar has been well recognized for its usefulness as it is used as an impression material for making a mold by taking advantage of its thermoplastic property.
In particular, agar is widely used in the medical field, including the dentistry field, because it has no fear of toxicity to living organisms.

As described above, generally, in the field of dentistry, an impression is taken with agar, and it is actually used frequently. The method used to obtain an impression in the dental field is to raise the temperature of agar from room temperature to around 100 ° C., heat and melt it at that temperature for a certain period of time, and then lower the temperature to about 55-55.
It has been performed that it is stored at around 65 ° C so that it can be used anytime. Normally, the agar impression material is a container that can be extruded into the cavity surface details of the impression site in advance.
For example, it is used by being filled in an impression syringe or the like, but in recent years, in order to keep the agar thus prepared in a usable state, it is also possible to use an instrument or device capable of setting and controlling the temperature. Is becoming. A constant temperature heating and holding device (agar conditioner) as a device capable of setting and managing the temperature has been developed as a computer-controlled device. When taking a dental impression using an agar impression material, the impression taker
The impression is taken by taking out the agar-filled impression syringe from the agar conditioner and extruding the agar impression material stored at a constant temperature from the tip nozzle of the impression syringe to the impression site. However, the agar impression material was left in the room temperature for a while, the operator's lack of experience and unexpected events caused the temperature of the agar impression material to move out of the optimum temperature range, and the impression was taken. It often happens that the work cannot be done properly and fails. When the agar impression material cools the syringe or the like for a long time and exceeds the softening temperature and reaches the solidification temperature, the impression collection cannot be performed unless the heating and melting step is performed again. It was difficult to determine the temperature of the agar impression material when performing the heating and melting step. Therefore, the impression was often unsuccessful even when the impression was taken again using such agar. Furthermore, the gelling temperature of agar is around 37 ° C, but the exact gelling temperature depends on several factors such as the purity of agar, the molecular weight, and the ratio of the agar content to the content of other components in the agar impression material. Dominated,
It is difficult to get a fixed value. There are various types of agar, and each has somewhat different properties, so we usually try to keep this gelling temperature constant by mixing several types of agar. Actually, the gelation temperature of each of the materials other than those made together may differ, so it is important to know the temperature characteristics of the agar impression material accurately.

[0004]

Means for Solving the Problems As a result of various investigations by the present inventors to develop a method for detecting the optimum temperature for use of a dental agar impression material, the temperature of the agar impression material was measured via an impression syringe. The present invention has been completed by recalling that the above problems can be solved if they can be visually discriminated.
That is, the present invention relates to (1) a dental impression syringe characterized in that the outer surface thereof is coated with a temperature-sensitive color change agent, and (2) a material mixed with the temperature-sensitive color change agent. It is a dental impression syringe characterized by the following. In the above invention, the temperature-sensitive color changing agent is composed of (1) an electron-donating color-developing organic compound, (2) an organic compound having a phenolic hydroxyl group, and (3) a color-developing adjusting compound. preferable. Further, the temperature-sensitive discoloring agent is preferably one that causes a color change at or near the softening point of the agar impression material, and at least in addition to causing a color change at or near the softening point of the agar impression material. It is preferable that the color change occurs (for example, the color change occurs in the boundary region of the optimum temperature for use) at a temperature other than the above.
The temperature-sensitive discoloring agent may be selected from widely known ones or commercially available ones as long as it is harmless under the usage form. As the temperature-sensitive color changing agent, those which cause a reversible color change can be preferably used, but in some cases, those which cause an irreversible change can also be used. The temperature-sensitive color-changing agent may be a single temperature-sensitive color-changing compound or may be a mixture of a plurality of compounds. Among the temperature-sensitive discoloring agents, those which change color with the transition of their crystal form such as cholesteric liquid crystal or CT type organic compound, or change in physical state such as melting It may be a color that changes with time.

As the temperature-sensitive discoloring agent, a compound comprising (1) an electron-donating color-developing organic compound, (2) an organic compound having a phenolic hydroxyl group, and (3) a color-developing adjusting compound is preferable. can give. Examples of the electron-donating color-developing organic compound include compounds that exhibit various colors by reacting with an organic compound having a phenolic hydroxyl group, and include, for example, blue, purple, green, yellow, orange, red and the like. Examples thereof include those exhibiting an intermediate color and the like, and those exhibiting various colors by mixing and containing the compound thus formed and exhibiting a color. The color exhibited by the temperature-sensitive color changing agent can be selected depending on the type of the electron-donating color-changing organic compound, and its concentration can be selected depending on the organic compound having a phenolic hydroxyl group. The color formed by the electron-donating color-forming organic compound and the organic compound having a phenolic hydroxyl group can be changed in a wide temperature range, for example, between -80 ° C and 200 ° C, It can also be changed to various colors at the temperature.

Specific examples of the above-mentioned electron-donating color-developing organic compound include crystal violet lactone, malachite green lactone, Michler hydrol, crystal violet carbinol, malachite green carbinol, and N- (2.3. Dichlorophenyl Q leuco auramine, N-acetyl auramine, N-
Phenyl auramine, N-benzoyl auramine, rhodamine B lactam, 2- (phenyliminoethanedilidene) 3.3-dimethylindoline), N-3.3trimethylindolinobenzospiropyran, 3-diethylamino-6-methyl -7-Chlorfluorane, 3-diethylamino-7-methoxyfluorane, 3-diethylamino-6-benzyloxyfluorane, 1.2-benz-
6-diethylaminofluorane and the like. Of these, more preferred are crystal violet lactone, 3-diethylamino-6-methyl-7-chlorofluorane, 3-diethylamino-7-methoxyfluorane, 3-diethylamino-6-benzyloxyfluorane, 1.2. -Benz-6-diethylaminofluorane,
N- (2,3-dichlorophenyl Q leuco auramine,
Examples include rhodamine B lactam.

The above-mentioned organic compound having a phenolic hydroxyl group may be one component of a compound that reacts with an electron-donating color-forming organic compound to form a color-forming substance, and specific examples thereof include nonylphenol and dodecylphenol. , Styrenated phenol, 2.2-methylenebis (4-methyl-6-tert-butylphenol), 4.4 '
-Methylene-bis- (4-methyl-6-tert-butylphenol), 2.4.6-trichlorophenol, O-phenylphenol, P-phenylphenol, P- (P-chlorophenyl) phenol, P-oxybenzoic acid Octyl acid, dodecyl P-oxybenzoate, bisphenol A, 1.2-dioxynaphthalene, 2.3
-Dihydroxynaphthalene, phenolphthalein, O
-Cresolphthalein, propyl procatechuate,
Zotyl procatechuate, octyl procatechuate,
Dodecyl procatechuate, 2.3.4-trioxyethylbenzene, methyl gallate, ethyl gallate, propyl gallate, butyl gallate, hexyl gallate, octyl gallate, dodecyl gallate, cetyl gallate,
Lauryl gallate, stearyl gallate, 2.3.5-
Examples include trioxynaphthalene, tannic acid, phenol resin initial condensation products, and the like. The organic compound having a phenolic hydroxyl group may be a non-volatile and hydrophilic compound such as gallic acid, methyl gallate,
Ethyl gallate, ammonium gallate, tannic acid,
Examples include procatechuic acid, methyl procatecuate, ethyl procatecuate, ammonium procatecuate, dioxynaphthalene, sodium sulfonate, and the like. Among these, more specifically, bisphenol A, phenol resin initial condensate, octyl P-oxybenzoate, butylhydroxyanisole, propyl gallate,
Octyl gallate, lauryl gallate, cetyl gallate, nonylphenol, tert-butylcatechol, 2.2'-methylenebis (4-methyl-6-tert-butylphenol), 4.4'-methylene-bis- (4-methyl) -6-tert-butylphenol), methyl P-oxybenzoate, ethyl P-oxybenzoate, octyl P-oxybenzoate, 2.3-dihydroxynaphthalene, β-naphthol and the like.

Examples of the color-developing adjusting compound include those known as color-desensitizing compounds or color-sensitizing compounds. The electron-donating color-developing organic compound and the organic compound having a phenolic hydroxyl group are used. It is mixed with a color-forming material consisting of the following to reduce or increase the color of the color-forming compound at a specific color-changing temperature or a certain range of color-changing temperature range. The color change temperature or the color change temperature range can be selected by variously selecting the type or blending amount of the color adjusting compound. Specific examples of the color adjusting compound include lauryl alcohol, myristyl alcohol, hytyl alcohol, stearyl alcohol, eicosyl alcohol, docosyl alcohol, triethylene glycol, polyethylene glycol, (molecular weight 200, 400, 600, 1500,4000,80
00, 20000), trimethylolpropane, triethanolamine, diethanolamine, triisopropanolamine, quaternary ammonium, polyoxyethylene alkylamine, polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether, sorbitan fatty acid ester, sucrose ester, Examples include dimethyl phthalate, diethyl phthalate, butyl myristate, butyl palmitate, methyl stearate, ethyl stearate, propyl stearate, butyl stearate, octyl stearate, butyl oleate, polyvinylpyrrolidone, and hydroxypropyl cellulose. . Examples of hydrophilic color adjusting compounds include triethylene glycol, polyethylene glycol, (molecular weights of 200, 400, 600, 1500, 4000, 600).
0.20000), dipropylene glycol, diethylene glycol, monobutyl ether, triethylene glycol monoethyl ether, glycerin, trimethylolpropane, hydroxypropyl cellulose, diethanolamine, triethanolamine, triisopropanolamine, quaternary ammonium, polyoxyethylene alkyl Examples include amines, polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenyl ethers, sorbitan fatty acid esters, sucrose esters, polyvinylpyrrolidone, diethylene glycol acetate, diethylene glycol monobutyl ether acetate. Among these, methyl stearate, n-butyl stearate, lauryl stearate, myristyl alcohol, cetyl alcohol, stearyl alcohol, isostearyl alcohol, n-docosyl alcohol, n-mesyl alcohol, n-decyl alcohol, ethylene glycol. Dibutyl ether, ethyl benzoate,
Specific examples thereof include n-butyl benzoate and cyclohexane, which can be used alone or in combination.

Examples of combinations of the respective components in the above temperature-sensitive color changing agent of the present invention include: Crystal Violet Lactone: Bisphenol A: Stearyl Acid n
-Butyl and myristyl alcohol ,. 3-Diethylamino-6-methyl-7-chlorofluorane: bisphenol A: n-butyl stearate and cetyl alcohol ,. 3-Diethylamino-6-methyl-7-chlorofluorane: bisphenol A: n-butyl stearate and cetyl alcohol ,. Crystal violet lactone: bisphenol A: n-butyl stearate, myristyl alcohol and cetyl alcohol ,.
3-diethylamino-6-methyl-7-chlorofluorane: bisphenol A: myristyl alcohol ,. Three
-Diethylamino-5-methyl-7-chlorofluorane: bisphenol A: lauryl stearate and myristyl alcohol ,. 3-diethylamino-6-methyl-7-chlorofluorane: bisphenol A: n-butyl stearate and stearyl alcohol ,. Crystal violet lactone: 2.2'-methylenebis (4-methyl-6-tert-butylphenol):
Myristyl alcohol ,. 3-diethylamino-6-
Methyl-7-chlorofluorane: bisphenol A: stearyl alcohol, 10. Rhodamine B lactam: phenol resin initial condensate: stearyl alcohol, 11. Crystal violet lactone: 2.2'-methylenebis (4-methyl-6-tert-butylphenol): cetyl alcohol, 12. Crystal violet lactone: Octyl gallate: Cetyl alcohol, 13.
3-Diethylamino-6-benzyloxyfluorane:
Octyl gallate: myristyl alcohol, 14. Crystal violet lactone: Octyl gallate: Myristyl alcohol, 15. Crystal violet lactone: Methyl P-oxybenzoate: Stearyl alcohol, 16.1 · 2-Benz-6-diethylaminofluorane: Ethyl P-oxybenzoate: Cetyl alcohol, 1
7. Rhodamine B lactam: ethyl P-oxybenzoate: docosyl alcohol, 18. N- (2,3-dichlorophenyl Q leuco auramine: methyl P-oxybenzoate: stearyl alcohol and butyl stearate, 1
9. N-acetyl auramine: ethyl P-oxybenzoate: cetyl alcohol, 20.3-diethylamino-7-
Methoxyfluorane: Lauryl gallate: Myristyl alcohol and the like. Although these temperature-sensitive discoloring agents have been described as having a single color, various kinds of electron-donating color-developing organic compounds can be mixed to produce a desired color.

The mixing ratio of each component in the above temperature-sensitive color changing agent is such that 1 to 10 parts by weight of the electron-donating color-developing organic compound is 2 for the organic compound having a phenolic hydroxyl group and the color-adjusting compound. ~ 200 parts by weight and 3 ~
It may be 300 parts by weight, preferably 2 to 50 parts by weight and 2 to 150 parts by weight. The temperature-sensitive discoloring agent can be used after being dissolved or dispersed in various solvents. Specifically, for example, water, methyl alcohol, ethyl alcohol, propyl alcohol, butyl alcohol,
Hexyl alcohol, octyl alcohol, methyl acetate, ethyl acetate, propyl acetate, butyl acetate, dibutyl phthalate, dioctyl phthalate, acetone, methyl ethyl ketone, methyl isobutyl ketone, toluene, xylene, dibenzylbenzene derivative, benzylated ethylbenzene, benzyl alcohol, triethylene Examples thereof include glycol, hexylene glycol, ethylene glycol monoethyl ether, ethylene glycol monophenyl ether, and hydrocarbon oil having a relatively high boiling point. These may be used alone or in combination of two or more. Further, as the temperature-sensitive discoloring agent, not only the above-mentioned organic ones but also known inorganic ones can be used. For example, a solid solution of a mercury iodide complex salt or a silver-copper mercury iodide complex salt may be used.

The dental impression syringe of the present invention can be selected from those commonly used in the field or commercially available. Examples of the material forming the syringe body include glass and plastic, and examples of the plastic include polyacrylate resin, polyethylene resin, polypropylene resin, and the like, which are usually used as the material of the container.

As means for coating the temperature-sensitive color change agent on the outer surface of the syringe, a method of mixing it with a paint and coating it on the outer surface of the syringe and polymerizing and curing it or a tape provided with a temperature-sensitive color change agent layer is attached to the outer surface of the syringe. There is a method for doing so. When applied as a paint, the vehicle of the temperature-sensitive discoloring agent is lacquer such as ethyl cellulose or nitrocellulose, alkyd resin varnish, silicone modified alkyd varnish, melamine resin varnish, urea resin varnish, epoxy resin varnish, vinyl chloride or vinyl acetate. A copolymer resin varnish, a methyl methacrylate / butyl acrylate copolymer resin varnish, a methyl methacrylate / vinyl acetate copolymer resin varnish, or the like can be used. In the present invention, the temperature-sensitive discoloring agent may be uniformly dispersed in the coating material or may be non-uniformly dispersed. This dispersion can be carried out by either adding the temperature-sensitive color changing agent directly into the paint or dispersing the temperature-sensitive color changing agent in the form of microcapsules. Various additives can be added to the temperature-sensitive discoloring agent according to the present invention in order to improve its performance, and for example, an antioxidant, an ultraviolet ray inhibitor, a heat stabilizer, a lubricant and the like can be used.

[0013]

EXAMPLES The present invention will be described below with reference to examples.
This is an example for understanding the present invention well, and the present invention is not limited to this, and various aspects can be included. Example 1 A methyl methacrylic acid / butyl acrylate copolymer resin varnish as a coating vehicle was added to a temperature-sensitive discoloring agent (a mixture of a fluoran compound, bisphenol A, n-butyl stearate, and cetyl alcohol) having a discoloring temperature of 47 ° C. ) Was added and mixed uniformly. The paint was applied to the surface of the dental impression syringe 1 shown in FIG. 1 and dried to form cured paint layers 1a, 1b, 1c and 1d. This syringe 1
2 is filled with agar impression material 2, and then the syringe 1 is inserted into the heating and heat retaining hole 3a of the constant temperature heating device (agar conditioner) 3 shown in FIG. 2 and the temperature is raised from room temperature to the melting temperature (about 98 ° C.). And held for a certain period of time. The color of the dental syringe surface paint layer 1a at that time was orange. Next, this impression material was cooled to a storage temperature (about 64 ° C.) and thereafter kept at the storage temperature. At this time, the color of the impression syringe surface paint layers 1a, 1b, 1c, 1d also remained orange. The syringe 1 was taken out from the agar conditioner 3 to obtain an impression of the patient's cavity. The color of the syringe surface paint layers 1b, 1c, 1d was orange. The agar impression material 2 was extruded from the nozzle at the tip of the syringe 1 and supplied to the cavity portion of the impression site to take an impression. As a result, it was confirmed that the impression accuracy was high and the dental impression acquisition was successful. For comparison, a conventional syringe was filled with an agar impression material, the syringe was heated, then placed on a desk for a while, and then an impression was taken. Since the temperature of the agar impression material was unknown, I was worried about the impression taking work. The result was not satisfactory.

Example 2 A polyacrylate resin prepolymer was added at about 90-98 ° C.
Shows milky white, shows purple at about 55-65 ° C, changes from purple to orange at about 47 ° C, about 30-35 ° C
Then, a temperature-sensitive color change agent that changes color from orange to green was added and mixed. A syringe molded product was molded using the prepolymer mixture, and was polymerized and cured to manufacture the main body 10 of the dental impression syringe 1 containing the temperature-sensitive discoloring agent shown in FIG. The syringe 1 was filled with the agar impression material 2 and inserted into the heating and heat retaining hole 3a of the agar conditioner 3 to raise the temperature from room temperature to the melting temperature (about 98 ° C). The syringe body 10 was milky white. The temperature was maintained for a certain period of time, during which the color of the main body 10 remained milky white. Next, store this syringe 1 at storage temperature (about 64 ° C)
Cooled down to. The color of the syringe body 10 changed to purple. Next, the syringe 1 containing the agar impression material 2 was taken out from the agar conditioner 3 in order to obtain the impression of the patient. The color of the taken out syringe main body 10 was purple. From the nozzle at the tip of the syringe 1 to the agar impression material 2
Was extruded and supplied to the cavity of the impression site, and an impression was taken. As a result, it was confirmed that the impression accuracy was high and the dental impression acquisition was successful. For comparison, a conventional syringe was filled with an agar impression material, the syringe was heated, then placed on a desk for a while, and then an impression was taken. Since the temperature of the agar impression material was unknown, I was worried about the impression taking work. The result was not satisfactory.

[0015]

According to the present invention, when a dental impression is taken, the temperature of the dental impression material of the syringe contents can be determined by observing the color of the syringe surface paint layer or by observing the color of the syringe itself. As a result, the impression taking work can be performed easily and accurately without any failure. Therefore, even if the agar is left at room temperature for a while due to an unskilled person with insufficient experience or an unexpected event, the impression taking operation can be carried out without worry.

[Brief description of drawings]

FIG. 1 is a perspective view of a dental impression syringe according to an embodiment of the present invention.

FIG. 2 is a perspective view of an agar conditioner.

FIG. 3 is a perspective view of a dental impression syringe according to another embodiment of the present invention.

[Explanation of symbols] 1: Syringe for dental impression 1a, 1b, 1c, 1d: Hardened paint layer mixed with a temperature-sensitive discoloring agent 2: Agar impression material 3: Agar conditioner 3a: Heat insulation hole 10: Main body of syringe

Claims (5)

[Claims] 1. A dental impression syringe characterized in that the temperature-sensitive discoloring agent is coated on the outer surface thereof. 2. A dental impression syringe characterized by being formed from a material in which a temperature-sensitive discoloring agent is mixed. 3. The temperature-sensitive color changing agent is composed of (1) an electron-donating color-developing organic compound, (2) an organic compound having a phenolic hydroxyl group, and (3) a color-developing adjusting compound. 1. The dental impression syringe according to 1 or 2. 4. The dental impression syringe according to claim 1, wherein the temperature-sensitive discoloring agent causes a color change at or near the softening point of the agar impression material. 5. The temperature-sensitive discoloring agent, in addition to causing a color change at or near the softening point of the agar impression material, also causes a color change at least at other temperatures. The dental impression syringe described in.