JP2015107239A - Dental material in bag, method of arranging impression obtaining material on dental tray, and method of making dental model - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and material that do not require a container nor a measurement to mix the material, mixture of the material being easily obtained only by kneading a bag, with no adverse effect on the human body due to no dispersion of dental powder, with less possibility of contamination of air bubbles during the mixture, with little waste of mixture material, facilitating the disposal of excess mixture material.SOLUTION: A bag has two or more layers of external and internal bags, and the inner layer made of a resin film that can be welded by a fusion at a temperature lower than that of the external layer. The bag is provided with a powder containing part and a liquid containing part that are separated by sectioned parts formed by heat welding the inner layers to each other. A dental powder whose amount is for one time usage is contained and sealed in the powder containing part, and a liquid whose amount corresponds to the liquid mixture ratio necessary to mix the dental powder is contained and sealed in the liquid containing part. The sectioned parts are connected together so that they can be broken by an external pressure, resulting in the flowing in of the dental powder and the liquid. By kneading the resin bag from its outside with hands, the dental powder and the liquid that become confluent due to the connection are designed to be mixed in the resin bag.

Description

  The present invention relates to agitation and mixing (usually referred to as “mixing”) of gypsum powder and liquid (usually water) used as a model material in dentistry, and an alginate powder used as an impression material for taking an impression. A dental material that can be easily stirred and mixed (usually referred to as “kneading”) with a liquid (usually water), and a dental powder kneading method using the dental material in the bag, The present invention also relates to a dental impression taking method and a dental model manufacturing method using the dental powder kneading method. Hereinafter, the “mixing” and “kneading” are collectively referred to as “kneading”.

  In dentistry, gypsum is used as a model material, and alginate is used as an impression material for taking an impression. Gypsum and alginate are used in a powder form (gypsum powder, alginate powder) and kneaded with water to form a paste (various hardness).

  In order to knead dental powder such as gypsum powder and alginate powder and water, the dental powder and water are mixed with a predetermined water mixture ratio (usually, the dental powder is used for a single amount of dental powder. It is put in a container (usually a rubber ball) with a specified amount of water determined for each powder) and kneaded for several minutes (usually about 1 to 2 minutes) in a rubber ball using a stirring rod or the like. Since this kneading is performed in the air, air (bubbles) may be mixed in the kneaded material during kneading. Since air contributes to cracks, defects, etc. in the dental model, the rubber ball is vibrated with a vibrator or defoamed using an antifoaming agent, and then the paste-like kneading material is used as a model material. Or it is used as an impression material. The surplus kneading material remaining after use is poured into a sink and collected by a gypsum trap, or removed from the container after disposal and discarded.

  Besides the blending method, there is a method of adding and kneading an aqueous emulsion obtained by emulsifying silicone oil with a nonionic surfactant (Patent Document 1), and a method of kneading using a vacuum stirrer (Non-Patent Document 1). Are known. Also, in fields other than dental use, in order to facilitate the measurement and mixing, one bag is partitioned to store facial liquid and absorbent cotton separately (Patent Document 2), and one bag is partitioned. In other words, there is a powder containing a bleaching powder and an aqueous liquid separately (Patent Document 3).

JP-A-5-155731 JP 2004-42951 A JP 2005-145543 A Product introduction page on the website of Nippon Dental Trading Co., Ltd. (URL: http://www.dentalsupply.co.jp/seihin/ren/001.html)

The conventional methods for kneading dental powder and water have the following problems.
(1) Since the dental powder and water are kneaded in the atmosphere (inside the indoor ball), the dental powder is likely to be scattered in the air during the kneading, and the operator may inhale the scattered powder. Since gypsum is a mineral mainly composed of calcium sulfate (CaSO ₄ ) and has a bad influence on the human body, it is not preferable to inhale scattered powder.
(2) If the mixing ratio of dental powder and water is inaccurate, the kneaded material may be expanded or contracted. However, since the accuracy (accuracy) of the mixed water ratio varies depending on the skill level of the worker, the quality of the obtained kneaded material varies depending on the worker kneading.
(3) Since it is difficult to prevent air bubbles from being mixed at the time of kneading, defoaming work using a vibrator, an antifoaming agent or the like after kneading is indispensable and time-consuming and troublesome.
(4) If the excess kneaded material is flowed as it is, the water supply pipes will be clogged, so it is treated with a gypsum trap. However, the introduction of the gypsum trap and the maintenance of the gypsum trap require time and cost. is there.
(5) Rubber balls must be washed after each use and are troublesome.
(6) The apparatus such as the vacuum stirrer described in Non-Patent Document 1 requires a lot of cost for its introduction and maintenance.

  An object of the present invention is to provide a bag-filled dental material, a dental powder kneading method, a dental impression adoption method, and a dental model manufacturing method that can solve the above-mentioned problems.

[Dental materials in bags]
The bag-containing dental material of the present invention is a bag-containing dental material in which dental powder and liquid to be kneaded are contained in a bag, and the bag includes at least an outer layer and an inner layer, and the inner layer is thermally welded at a lower temperature than the outer layer. It is made of a resin film, and includes a powder container and a liquid container, and the powder container and the liquid container are partitioned by a partition part in which the inner layers are thermally welded, and a single usage amount of dental powder is obtained. The powder container is housed and sealed, and an amount of liquid necessary for kneading the dental powder is housed and sealed in the liquid container, and the partition part is opened (including broken) by pressurizing from the outside. When the dental powder and the liquid communicate with each other and the resin bag (hereinafter referred to as “resin bag”) is manually squeezed from the outside, the dental powder and the liquid merged by the communication of the compartments are Kneaded in the plastic bag That. Here, the amount used once means an amount necessary for one pouring when the dental powder is gypsum powder (including a slight excess amount: the same in the detailed description of the invention and the claims), dental If the powder is an alginate powder, it is the amount necessary for one molding (including some surplus amount: the same in the detailed description of the invention and the claims), and the amount depends on the patient, It depends on the site of use.

  The bag-filled dental material is an easy peel film in which the inner layer is heat-weldable at a lower temperature than the outer layer, and the heat-welded section is opened (broken) by an external force applied from the outside of the resin bag. be able to.

  The amount of dental powder accommodated and sealed in the powder container and the amount of liquid accommodated and sealed in the liquid container are selected within a range of 19 to 55% depending on the type of dental powder. Amount.

  The resin bag is preferably sized so that dental powder and liquid can be kneaded by grasping with one hand.

  In the bag-containing dental material, a sphere is accommodated together with the dental powder or the liquid in the powder accommodating portion and / or the liquid accommodating portion, and the sphere is dentally held in a resin bag by hand. When the powder and the liquid are kneaded, the dental powder and the liquid can be moved to facilitate kneading them.

  The bag-filled dental material may contain gypsum powder or alginate powder as dental powder in the powder container and water as liquid in the liquid container. In this case, the water may contain a dental powder curing accelerator or curing retarder. The curing accelerator may be sugar and the curing retarder may be salt.

[Dental powder kneading method]
The dental powder kneading method of the present invention is a method in which dental powder and liquid are kneaded into a paste, using the bag-containing dental material, and applying external force to the resin-made bag of the bag-containing dental material. All or part of the part is opened (damaged), the dental powder in the powder container and the liquid in the liquid container are merged, the resin bag is held by hand, and the merged dental in the resin bag In this method, the powder and liquid are kneaded into a paste, a part of the resin bag is opened, and the kneaded dental material can be extruded from the opening by pushing the resin bag by hand.

[Dental impression taking method]
The method for obtaining a dental impression of the present invention is the method for kneading a dental powder in a method for obtaining an impression by placing a kneaded alginate obtained by kneading a paste of alginate powder and a liquid, which is a dental powder, in a dental tray. The paste-like kneaded alginate obtained in the above is a method for taking an impression by pushing a resin bag kneaded with the kneaded alginate by hand and placing it in an opening of the resin bag and placing it in a dental tray. .

[Dental model production method]
The method for producing a dental model of the present invention is a method for producing a dental model by filling a dental mold with gypsum powder that is a dental powder and a kneaded plaster obtained by kneading a liquid into a paste. The paste-like kneaded gypsum obtained by the kneading method is pushed by pushing the resin bag used for kneading the kneaded gypsum by hand, and filled in a dental mold for dental use. It is a method of making a model for the machine.

The encapsulated dental material of the present invention has the following effects.
(1) Since dental powder and liquid are stored in a single resin bag with a predetermined mixed water ratio, both do not need to be measured and mixed water regardless of the skill level of the operator. You can make models and impressions with accurate ratios.
(2) Kneading the dental powder and liquid in the resin bag in the resin bag by applying an external force to the resin bag to open the partition and pinching the resin bag from the outside. Since it can be made into a paste-like kneading material, the dental powder does not scatter in the air, and there is no adverse effect on the human body due to the operator inhaling the dental powder.
(3) Since kneading can be performed without opening the resin bag, air does not enter the resin bag during kneading, and there is no need for defoaming. The dental model molded with the kneading material is almost free from quality deterioration (cracking, chipping, etc.) due to air mixing.
(4) Since it is not necessary to use a rubber ball for kneading dental powder and liquid, there is no trouble of washing the rubber ball.
(5) Since the amount of dental powder and liquid that can be used up once is stored in the resin bag, there is little waste of materials.
(6) When the paste-like kneading material is left, the surplus kneading material can be disposed of together with the resin bag, so that disposal after use is easy.
(7) When spheres are stored together with dental powder or liquid in either or both of the powder storage section and the liquid storage section, no lumps are likely to occur during kneading.
(8) When a curing accelerator or a curing retarder is added to the liquid, the curing speed of the dental powder can be adjusted according to the application, so that it is easy to perform a mold making operation or a dental model manufacturing operation. By the way, in the case of containing sugar, curing is delayed, and in the case of containing salt, curing is accelerated.

  Since the dental powder kneading method of the present invention uses the above-mentioned dental material in a bag, the container and the metering are not necessary for kneading, and it can be easily kneaded simply by pinching a resin bag, and the dental powder does not scatter. There is no adverse effect on the human body, bubbles are less likely to be mixed during kneading, waste of the kneading material is small, and disposal of excess kneading material is facilitated.

  In the dental impression taking method of the present invention, the kneaded alginate kneaded in paste form by the dental powder kneading method is used, so that a dental impression can be taken easily.

  Since the dental model manufacturing method of the present invention uses the kneaded plaster kneaded into a paste by the dental powder kneading method, a dental model can be easily manufactured.

An example of the dental material in a bag of this invention is shown, Comprising: (a) is the front view, (b) is a XX arrow view of (a), (c) is A part of (b). Detail view. The front view which shows the other example of the dental material with a bag of this invention, Comprising: An example at the time of accommodating a spherical body with powder in the powder accommodating part. BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows an example of the dental material kneading | mixing method (usage method of bagged dental material) of this invention, Comprising: (a) is explanatory drawing which shows the state by which the dental powder and the liquid were isolated by the division part. (B) Explanatory drawing which pushes a resin bag by the hand from the outside, and joins a dental powder and a liquid, (c) Kneads a resin bag by the hand from the outside, and knead | mixes dental powder and a liquid Explanatory drawing which shows a state.

(Embodiment 1 of bag-type dental material)
An example of an embodiment of the bag-containing dental material 10 of the present invention will be described with reference to FIGS. 1 (a) to 1 (c), a plastic bag 1 is partitioned by a partition part (thermal welding part) 2 into a plastic container 1 and a liquid container 4 to store powder. The part 3 contains gypsum powder P as dental powder, and the liquid storage part 4 contains water (purified water) W as a liquid. Examples of the gypsum used in the present invention include ordinary gypsum, hard gypsum, and super hard gypsum.

[Resin bag]
The resin bag 1 has a peripheral portion of a laminated film of two or more layers provided with at least an outer layer (base material) 1a and an inner layer 1b, and the inner layers 1b facing each other in the inner space of the peripheral portion are thermally welded. A powder container 3 and a liquid container 4 are formed by being partitioned by the partition 2. Although various resin-made things can be used for a laminated film, as an example, the outer layer 1a is suitable for nylon, and the interior 1b is suitable for an easy peel film of polyethylene (PE). Nylon has a higher heat welding temperature than polyethylene and is superior in strength. Polyethylene has a heat welding temperature lower than that of nylon, and easily peels off (appropriately peelable) when an external force is applied to the resin bag 1 after heat welding. The material of the laminated film may be other than the above, and polypropylene (PP), polyethylene, vinyl chloride resin or the like may be used for the outer layer 1a, and a resin having a lower heat welding temperature than those may be used for the inner layer 1b.

  The resin bag 1 is elongate, and a partition 2 is provided at a location about 1/3 in the longitudinal direction to partition the powder container 3 and the liquid container 4. The partition part 2 is formed by heat-welding the inner layer 1b of the resin bag 1. The partition portion 2 is an easy peel portion having a thermal welding force that is not torn even when a certain external force is applied (the tear 5 does not occur) but is torn only when a strong external force of a predetermined level or more is applied.

  In the example shown in FIG. 1 (a), the partition 2 is thermally welded in an oblique band shape, but it is also possible to thermally weld it in a parallel belt shape, or in a V shape, a corrugated shape, or other shapes. You can also. For example, by making the partition part 2 V-shaped and tapering a part thereof, when pressure (external force) is applied to the resin bag 1 from the outside, the external force is concentrated on the tapered part and the partition part 2 is opened ( Breakage). When the width of the partition part 2 is narrow, it may be partially damaged or peeled by an external force applied inadvertently, and the water W in the liquid storage part 4 may flow into the powder storage part 3 in which the gypsum powder P is stored. . In order to prevent this, it is desirable that the partition portion 2 has a fusion strength and a width that do not cause such breakage or peeling. In some cases, the partition portion 2 can be provided at two locations slightly apart in the longitudinal direction of the resin bag 1 (doublely provided) to keep it from being damaged. The weld strength of the partition portion 2 is weaker than the seal strength (weld strength) of the peripheral portion, so that even if the weld of the partition portion 2 is damaged by force, the seal (weld) of the peripheral portion is not damaged.

  The resin bag 1 is preferably flexible and thick enough to stagnate. As an example, a resin bag 1 shown in FIGS. 1A to 1C is an example in which a nylon film having a thickness of 15 μm is used for the outer layer 1a and a polyethylene film having a thickness of 30 μm is used for the inner layer 1b. For example, the outer layer 1a may be a nylon film having a thickness of 15 μm, and the inner layer 1b may be a polyethylene film having a thickness of 50 μm.

  The size of the resin bag 1 can be appropriately designed depending on the amount of gypsum powder P and water W to be accommodated. For example, in the case of 50 g for containing 50 g of gypsum powder P, the length is 180 mm to 250 mm × 55 mm to When about 75 mm (more preferably about 200 mm long × 70 mm wide) is used for 100 g containing 100 g of gypsum powder P, about 230-300 mm long × 65-90 mm wide is suitable. In any case, when the above-mentioned amount of dental powder is stored in the powder storage unit 3 and the liquid mixing unit 4 stores a liquid with the required water mixture ratio, an adult woman can hold it with one hand. It is preferable that the size is as large as possible (with width and thickness).

  The inner layer 1b of the resin bag 1 preferably has an arcuate shape (with an R) as shown in FIG. By making the corners arc, it is difficult for the gypsum powder P to accumulate in the four corners of the inner layer 1b, and the powder that is not kneaded can be prevented from remaining. A cut portion 6 is formed in a part (for example, a corner portion) of the resin bag 1, and when the cut portion 6 is cut, an outlet (not shown) is opened (formed) in the resin bag 1. It is preferable to do so. After the gypsum powder P and the water W are kneaded into a paste, the cut portion 6 is cut out to form an outlet, and the paste-like kneaded gypsum (kneaded material) can be squeezed out (extruded) from the outlet.

[Dental powder / liquid]
In this embodiment, the case where the gypsum powder P is accommodated in the powder accommodating portion 3 is described as an example. However, the powder accommodating portion 3 accommodates an alginate powder for taking an impression or other dental powder. You can also Moreover, although the case where purified water is stored in the liquid storage unit 4 is taken as an example, pure water or tap water can also be stored. In some cases, a trace amount of a curing accelerator and a curing retarder can be dissolved in water. Examples of the hardening accelerator for gypsum include alkali metal sulfates such as sodium sulfate and potassium sulfate, calcium chloride, and sodium chloride (salt content). Examples of the setting retarder for gypsum include colloidal substances that slow the diffusion rate such as starch and glue, organic acids such as acetic acid and salts thereof, and boric acid. Boric acid is highly effective as a curing retarder, and if the concentration is changed at 2% or less, curing can be delayed for a desired time.

  The water W may basically be at room temperature, but water (hot water) or cold water (cold water) warmer than room temperature can be accommodated. When the temperature of water is high, the curing time of the gypsum powder P can be promoted more than when the temperature is low, and the curing time can be shortened. Therefore, if possible, the resin bag 1 can be heated by using a heat-resistant resin film that can be heated. When the temperature of water is low, the setting time of the gypsum powder P can be delayed as compared with the case where the temperature is high.

[Mixed water ratio]
The mixed water ratio (W / P; weight ratio) of gypsum powder P and water W accommodated in the accommodating parts 3 and 4 is in the range of 0.19 to 0.55 (19 to 55%) depending on the type of gypsum powder P. Can be selected. For example, when ordinary gypsum (powder) is stored in the powder container 3, mixing is easy when the mixed water ratio is about 45%, and when mixed gypsum (powder) is stored in the powder container 3, the mixed water ratio When it is about 23%, kneading is easy. Since the mixed water ratio varies depending on the dental powder to be used, it can be appropriately changed according to the dental powder used, but the kneaded gypsum tends to break like a powder when the mixed water ratio is lower than 0.19, 0.55 If it becomes higher than this, it will become harder and harder. For this reason, in any case, it is preferable to select the mixed water ratio in the range of 0.19 to 0.55 (19 to 55%).

  The amount of gypsum powder P to be stored in the powder storage unit 3 is the amount that can be used up at one time or the amount that does not become too short (doesn't be too much) (one use amount). Is preferred. By putting the amount of use once, it is possible to save time and labor for measuring the gypsum powder P, and it is possible to reduce the excess amount of the kneaded gypsum powder P and prevent the gypsum powder P from being wasted. However, the amount of use at one time varies depending on the width and depth of the treatment site, and two or more molds may be taken or filled in two or more molds at one time. The amount is not limited to the amount required for one mold, or the amount to be filled in one mold. For example, the amount to be used at one time is set as a reference amount such as 50 g or 60 g, and other than the reference amount It is possible to prepare and measure several types of dental materials 10 in bags with different quantities by preliminarily measuring and filling them, such as 75 g or 100 g.

(Embodiment 2 of the dental material in a bag)
Another example of the embodiment of the bag-containing dental material 10 of the present invention will be described with reference to FIG. The basic structure of the bag-type dental material 10 of this embodiment is the same as that of the bag-type dental material 10 of the first embodiment. The difference is that the sphere 7 is housed together with the gypsum powder P or the water W in the powder container 3 and / or the liquid container 4. The sphere 7 is preferably a metal or resin sphere, and its diameter is preferably about several mm. The gypsum powder P and the water W are easily kneaded by inserting the sphere 7. Two or more spheres 7 can be accommodated. The two or more spheres 7 may have the same shape or different shapes, and may have the same shape or different sizes.

(Other embodiment of dental material in a bag)
It is desirable that the powder container 3 and the liquid container 4 of the bag-containing dental material 10 be in a vacuum state (including a substantially vacuum state) if possible. By adopting a vacuum state (a state in which no air is mixed), no bubbles are generated in the paste-like material being kneaded, and an improvement in the quality of the kneaded material can be expected. In addition, the defoaming work that has been necessary until now becomes unnecessary, and improvement in workability can be expected.

  In the said embodiment, although the case where the resin bag 1 and the accommodating parts 3 and 4 are elongate is demonstrated as an example, they may be another shape. Further, since the amount of the necessary material varies depending on the patient, several types of bag-type dental materials 10 having different amounts can be prepared in advance so that they can be selectively used according to the situation.

(Production method for dental materials in bags)
The dental material 10 in the bag shown in FIGS. 1 (a) to 1 (c) and FIG. 2 is the first to accommodate dental powder in the powder container 3 and liquid in the liquid container 4. It may be done at the same time if possible. In either case, the openings of the powder storage unit 3 and the liquid storage unit 4 are heat-sealed and sealed after the storage. This thermal welding and the thermal welding around the resin bag 1 are made stronger than the thermal welding of the partition part 2 so that even if the partition part 2 is damaged by an external force, the thermal welding of the periphery and the opening is not damaged. To do.

(Example of using dental materials in bags)
An example of using the bag-containing dental material 10 of the present invention will be described. This use example is an example in which the gypsum powder P and the water W are kneaded in the resin bag 1.
(1) A partition between the powder container 3 and the liquid container 4 by applying an external force to the resin bag 1 by pressing the resin bag 1 (FIG. 3A) of the prepared dental material 10 in the bag from the outside. All or a part of the part 2 is broken (broken), and a slit 5 (FIG. 3B) is inserted to allow the powder container 3 and the liquid container 4 to communicate with each other.
(2) The gypsum powder P and water W accommodated in the powder accommodating part 3 and the liquid accommodating part 4 are merged in the resin bag 1 from the tear (communication part) 5 (FIG. 3B). When the rift 5 is partially inserted, the rift 5 spreads, and finally the entire partition 2 is opened and communicated.
(3) Holding the resin bag 1 by hand, holding the resin bag 1 by hand from the outside, kneading the gypsum powder P and water W in the resin bag 1 to form a paste (FIG. 3). (C)). The hardness of the paste varies depending on the type of powder and the water mixing ratio. The resin bag 1 can be held and held with one hand or both hands.
(4) The cut portion 6 of the resin bag 1 is cut out, the resin bag 1 is pushed by hand from the outside, and paste-like kneaded gypsum is pushed out from the opened cut portion 6 and poured into a mold. The poured gypsum that has been poured is cured to complete the dental model. When the powder in the powder container 3 is an alginate powder, the powder is squeezed out from the resin bag 1 and placed in a tray. In addition, when the spherical body 7 is contained in the powder storage part 3 or the liquid storage part 4, it is preferable to extrude the kneaded gypsum in a state in which the spherical body 7 is picked with a finger so as not to come out of the resin bag 1.
(5) When kneaded gypsum or kneaded alginate remains, the resin bag 1 is disposed of as non-combustible material (discarded).

  When the inside of the resin-made bag 1 of the bag-containing dental material 10 according to the present invention is in a vacuum state (including a substantially vacuum state), by carrying out the mixing in the resin-made bag 1, bubbles are formed in the paste-like kneading material. Can be expected to improve the quality of molded models and impression materials (not easily cracked or chipped). In addition, the defoaming work that has been necessary until now becomes unnecessary, and improvement in workability can be expected.

  The above-mentioned use example is an example, and can be used by other methods. Moreover, it can be used by the same method also when mixing gypsum powder P and water W using the dental material 10 in a bag shown in FIG.

(Embodiment of dental powder kneading method)
The dental powder kneading method of the present invention will be described. The dental powder kneading method of the present invention is a method of kneading dental powder (for example, gypsum powder P or alginate powder) and a liquid (for example, water W) into a paste, and uses the bag-shaped dental material 10. Then, holding the dental material 10 in the bag and applying an external force to the resin bag 1 to open or damage all or part of the partition part 2, the dental powder and liquid container in the powder container 3 The liquid in 4 is merged. Thereafter, the resin bag 1 is held by hand, and the dental powder and the liquid merged in the resin bag 1 are kneaded to form a paste. Thereafter, the cut portion 6 of the resin bag 1 is opened, and the kneaded dental material can be pushed out from the opening portion by pushing the resin bag 1 by hand.

(Embodiment of dental impression taking method)
The dental impression taking method of the present invention will be described. The dental impression taking method of the present invention is a method of taking an impression by placing a kneaded alginate obtained by kneading a paste of alginate powder and a liquid (for example, water W) into a dental tray. The paste-like kneaded alginate obtained by the dental powder kneading method is pushed out of the opening of the resin bag 1 by manually pushing the resin bag 1 kneaded with the kneaded alginate, and is placed in the dental tray. It is a method of taking an impression.

(Embodiment of dental model manufacturing method)
The dental model manufacturing method of the present invention will be described. The method for producing a dental model of the present invention is a method for producing a dental model by filling a dental mold with kneaded gypsum obtained by kneading gypsum powder P, which is a dental powder, and a liquid (for example, water W) into a paste. The paste-like kneaded gypsum obtained by the dental powder kneading method is pushed out of the opening of the bag by pushing the bag used for kneading the kneaded gypsum into the dental mold. It is a method of filling and producing a dental model.

  In the said embodiment, although the case where gypsum (all powder) and water, such as normal gypsum, hard plaster, and super hard gypsum, and water are accommodated in one resin bag 1, is demonstrated as an example, the bag of this invention is contained. In addition to the plaster, the dental material 10 can also contain an alginate powder and water used as an impression-taking material (impression material) and other powders and liquids other than water.

1 Resin bag 1a Outer layer (base material)
1b Inner layer 2 Partition (thermal welding part)
3 Powder container 4 Liquid container 5 Crack (communication part)
6 Cutting part 7 Sphere 10 Dental material in bag P Gypsum powder (dental powder)
W Water (liquid)

The present invention relates to agitation and mixing (usually referred to as “mixing”) of gypsum powder and liquid (usually water) used as a model material in dentistry, and an alginate powder used as an impression material for taking an impression. Dental materials that can be easily stirred and mixed (usually referred to as “kneading”) with liquid (usually water) and impressions on dental trays that use these dental materials The present invention relates to a method for assembling collected material and a method for producing a dental model. Hereinafter, the “mixing” and “kneading” are collectively referred to as “kneading”.

  In dentistry, gypsum is used as a model material, and alginate is used as an impression material for taking an impression. Gypsum and alginate are used in a powder form (gypsum powder, alginate powder) and kneaded with water to form a paste (various hardness).

In order to knead dental powder such as gypsum powder and alginate powder and water, the dental powder and water are mixed with a predetermined water mixture ratio (usually, the dental powder is used for a single amount of dental powder. It is put in a container (usually a rubber ball) with a specified amount of water determined for each powder) and kneaded for several minutes (usually about 1 to 2 minutes) in a rubber ball using a stirring rod or the like. Since this kneading is performed in the air, air (bubbles) may be mixed in the kneaded material during kneading. Since air contributes to cracks, defects, etc. of the dental model, a paste-like kneading material is used as a model material or an impression material after performing a defoaming operation by vibrating a rubber ball with a vibrator. The surplus kneading material remaining after use is poured into a sink and collected by a gypsum trap, or removed from the container after disposal and discarded.

  Besides the blending method, there is a method of adding and kneading an aqueous emulsion obtained by emulsifying silicone oil with a nonionic surfactant (Patent Document 1), and a method of kneading using a vacuum stirrer (Non-Patent Document 1). Are known. Also, in fields other than dental use, in order to facilitate the measurement and mixing, one bag is partitioned to store facial liquid and absorbent cotton separately (Patent Document 2), and one bag is partitioned. In other words, there is a powder containing a bleaching powder and an aqueous liquid separately (Patent Document 3).

JP-A-5-155731 JP 2004-42951 A JP 2005-145543 A Product introduction page on the website of Nippon Dental Trading Co., Ltd. (URL: http://www.dentalsupply.co.jp/seihin/ren/001.html)

The conventional methods for kneading dental powder and water have the following problems.
(1) Since the dental powder and water are kneaded in the atmosphere (inside the indoor ball), the dental powder is likely to be scattered in the air during the kneading, and the operator may inhale the scattered powder. Since gypsum is a mineral mainly composed of calcium sulfate (CaSO4) and has an adverse effect on the human body, it is not preferable to inhale scattered powder.
(2) If the mixing ratio of dental powder and water is inaccurate, the kneaded material may be expanded or contracted. However, since the accuracy (accuracy) of the mixed water ratio varies depending on the skill level of the worker, the quality of the obtained kneaded material varies depending on the worker kneading.
(3) Since it is difficult to prevent air bubbles from being mixed at the time of kneading, defoaming work using a vibrator or the like after kneading is indispensable and time-consuming and troublesome.
(4) If the excess kneaded material is flowed as it is, the water supply pipes will be clogged, so it is treated with a gypsum trap. However, the introduction of the gypsum trap and the maintenance of the gypsum trap require time and cost. is there.
(5) Rubber balls must be washed after each use and are troublesome.
(6) The apparatus such as the vacuum stirrer described in Non-Patent Document 1 requires a lot of cost for its introduction and maintenance.

An object of the present invention is to provide a bag-filled dental material that can solve the above-described problems, a method for placing an impression- taking material on a dental tray, and a method for producing a dental model.

[Dental materials in bags]
The bag-type dental material of the present invention is a bag-type dental material in which a dental powder and a liquid to be kneaded are contained in a bag. The bag has two or more layers in which an outer layer and an inner layer are laminated , and the inner layer is more than the outer layer. Is made of a laminated resin film that can be heat-welded at a low temperature, and the bag is partitioned by a partition part in which the inner layers are heat-sealed, and includes a powder container part and a liquid container part. The powder is housed and sealed in the powder container, and the amount of liquid necessary for kneading the dental powder is housed and sealed in the liquid container, and the dental powder is a dental impression- taking powder, The amount of dental impression taking powder used once is the amount that can be used up by placing it in one or several dental trays, and the amount of the liquid is the kneading of the dental impression taking powder. in an amount of mixing water ratio required, the partition portion of the peripheral edge of the bag A weak seal strength than Lumpur strength, dental where the liquid storage portion and the powder housing part by pushing the bag and by Ri breakage in applying an external force is communicated, are accommodated in the respective receptacle It is a seal strength at which the impression-taking powder and the liquid merge, and the bag containing the dental impression-taking powder is contained in the powder container, and the liquid is contained in the liquid container. There is flexibility that can be rubbed, and by squeezing from the outside by hand, the powder and liquid for dental impression taking together by the communication can be kneaded in the bag to make a paste-like impression taking material It has a width and thickness that can be obtained and has strength that does not break even when kneaded and kneaded, and paste-like impression-taking material can be placed on a dental tray by opening a part of the bag and extruding it from the bag. , Bag after extrusion, excess pace in the bag One in which Jo impression can be discarded each obtained material. In the bag-filled dental material, the dental impression-taking powder can be a dental alginate powder.

The bag-type dental material of the present invention is a bag-type dental material in which a dental gypsum powder and a liquid to be kneaded are contained in a bag. The bag has two or more layers in which an outer layer and an inner layer are laminated , and the inner layer is an outer layer. It is made of a laminated resin film that can be heat-welded at a lower temperature, and the bag is partitioned by a partition portion in which the inner layers are heat-sealed, and includes a powder storage portion and a liquid storage portion. Dental powder is housed and sealed in the powder container, and an amount of liquid necessary for kneading the dental powder is housed and sealed in the liquid container, and the dental powder is dental gypsum powder, The amount of gypsum powder used once is the amount that can be used up by filling in one or several dental molds, and the amount of liquid is the water mixing ratio required for kneading the dental gypsum powder. is the amount, the partition portion is weaker than the seal strength of the peripheral portion of the bag A Lumpur strength, press the bag and by Ri breakage in applying an external force communicating said powder housing portion and the liquid storage portion, the dental gypsum powder and liquid contained in the respective receptacle merging The bag containing dental gypsum powder stored in the powder container and liquid stored in the liquid container is flexible enough to be squeezed from the outside by hand. The width and thickness of the dental gypsum powder and the liquid merged by the communication can be kneaded in the bag to form a paste, and have the strength not to be damaged even if kneaded. The paste-like gypsum can be filled into a dental mold by extruding it from the bag, and the bag after the extrusion can be discarded together with the excess paste-like gypsum in the bag.

The bag-filled dental material is an easy peel film in which the laminated resin film has an inner layer having a lower heat fusion temperature than the outer layer , and the bag partition is formed by thermally fusing the inner layer of the easy peel film. Can be.

The bag-containing dental material contains dental powder in a powder container , and a bag containing liquid in a liquid container holds it with one hand and kneads it with one hand to mix the dental powder and liquid in the bag. The width and thickness can be made.

For the dental material in the bag, the amount of dental powder accommodated and sealed in the powder container and the amount of liquid accommodated and sealed in the liquid container are selected in the range of a mixed water ratio of 19 to 55%. It can be an amount. Further, the volume of the powder container can be made smaller than the volume of the liquid container.

In the bag-containing dental material, a sphere is accommodated together with the dental powder or the liquid in the powder container and / or the liquid container, and the sphere is held in the bag by hand. When the liquid is kneaded, the size can be made such that the dental powder and the liquid can be moved and kneaded easily.

In the bag-filled dental material, the liquid contained and sealed in the liquid container may be water containing a curing accelerator or a curing retarder .

[ How to put impression collecting material on dental trays ]
Dental tray of the present invention - the impression of the adoption resulting material dished method Serve a dental powder and is then kneaded dental impression obtained powder and liquid paste to the impression obtained material into a dental tray In the method of assembling an impression collecting material on a dental tray that can be used to obtain an impression using this tray , any one of the above-mentioned dental materials in a bag is used, and the dental material in the bag is made of a resin. Apply external force to the bag to open all or part of the compartment, merge the dental impression- taking powder in the powder container and the liquid in the liquid container, and grasp the resin bag by hand. In the resin bag, the combined dental impression taking powder and liquid are kneaded into a paste-like impression taking material , a part of the resin bag is opened, and the resin bag is opened by hand. press, press pasty impression obtained material from the opening into the dental tray And Serve in a way to allow an impression.

[Dental model production method]
Dental model fabrication method of the present invention is a method of making a dental model by filling the kneaded dental plaster dental stone plaster powder and liquid was kneaded into a paste in a dental mold, claim 3 Using the dental material in a bag according to any one of claims 9 and applying an external force to the resin-made bag of the dental material in the bag to open all or part of the partition portion, The dental gypsum powder and the liquid in the liquid container are joined together, the resin bag is gripped and kneaded by hand, and the joined dental gypsum powder and liquid are kneaded in the resin bag to form a paste-like gypsum A part of the resin bag is opened, the resin bag is pushed by hand, and the paste-like gypsum is pushed out from the opening into a dental mold to fill a dental model. .

The encapsulated dental material of the present invention has the following effects.
(1) Since dental powder and liquid are stored in a single resin bag with a predetermined mixed water ratio, both do not need to be measured and mixed water regardless of the skill level of the operator. You can make models and impressions with accurate ratios.
(2) Kneading the dental powder and liquid in the resin bag in the resin bag by applying an external force to the resin bag to open the partition and pinching the resin bag from the outside. Since it can be made into a paste-like kneading material, the dental powder does not scatter in the air, and there is no adverse effect on the human body due to the operator inhaling the dental powder.
(3) Since kneading can be performed without opening the resin bag, air does not enter the resin bag during kneading, and there is no need for defoaming. The dental model molded with the kneading material is almost free from quality deterioration (cracking, chipping, etc.) due to air mixing.
(4) Since it is not necessary to use a rubber ball for kneading dental powder and liquid, there is no trouble of washing the rubber ball.
(5) Since the amount of dental powder and liquid that can be used up once is stored in the resin bag, there is little waste of materials.
(6) When the paste-like kneading material is left, the surplus kneading material can be disposed of together with the resin bag, so that disposal after use is easy.
(7) When spheres are stored together with dental powder or liquid in either or both of the powder storage section and the liquid storage section, no lumps are likely to occur during kneading.
(8) When a curing accelerator or a curing retarder is added to the liquid, the curing speed of the dental powder can be adjusted according to the application, so that it is easy to perform a mold making operation or a dental model manufacturing operation. By the way, in the case of containing sugar, curing is delayed, and in the case of containing salt, curing is accelerated.

In this onset bright, for using said bag containing dental material, it is also required even weighing container for kneading, can easily kneaded by simply rub the resin bag, adverse effects on the human body dental powder does not scatter No air bubbles are mixed in at the time of kneading, waste of the kneading material is small, and disposal of the excess kneading material becomes easy.

In this onset bright, for the use of a paste by kneading the kneaded alginate can Tokusuru easily adopted dental impression.

  Since the dental model manufacturing method of the present invention uses the kneaded plaster kneaded into a paste by the dental powder kneading method, a dental model can be easily manufactured.

An example of the dental material in a bag of this invention is shown, Comprising: (a) is the front view, (b) is a XX arrow view of (a), (c) is A part of (b). Detail view. The front view which shows the other example of the dental material with a bag of this invention, Comprising: An example at the time of accommodating a spherical body with powder in the powder accommodating part. It is explanatory drawing which shows an example of the usage method of the dental material in a bag in this invention , Comprising: (a) is explanatory drawing which shows the state by which the dental powder and the liquid were isolated by the partition part, (b) is resin-made. Explanatory drawing which pushes a bag by the hand from the outside and merges dental powder and a liquid, (c) is explanatory drawing which shows the state which knead | mixes dental powder and a liquid by holding a resin bag by the hand from the outside.

(According to the first embodiment of the bag containing dental timber fee)
An example of an embodiment of the bag-containing dental material 10 of the present invention will be described with reference to FIGS. 1 (a) to 1 (c), a plastic bag 1 is partitioned by a partition part (thermal welding part) 2 into a plastic container 1 and a liquid container 4 to store powder. The part 3 contains gypsum powder P as dental powder, and the liquid storage part 4 contains water (purified water) W as a liquid. Examples of the gypsum used in the present invention include ordinary gypsum, hard gypsum, and super hard gypsum.

[Resin bag]
The resin bag 1 has a peripheral portion of a laminated film of two or more layers provided with at least an outer layer (base material) 1a and an inner layer 1b, and the inner layers 1b facing each other in the inner space of the peripheral portion are thermally welded. A powder container 3 and a liquid container 4 are formed by being partitioned by the partition 2. Although various resin-made things can be used for a laminated film, as an example, the outer layer 1a is suitable for nylon, and the interior 1b is suitable for an easy peel film of polyethylene (PE). Nylon has a higher heat welding temperature than polyethylene and is superior in strength. Polyethylene has a heat welding temperature lower than that of nylon, and easily peels off (appropriately peelable) when an external force is applied to the resin bag 1 after heat welding. The material of the laminated film may be other than the above, and polypropylene (PP), polyethylene, vinyl chloride resin or the like may be used for the outer layer 1a, and a resin having a lower heat welding temperature than those may be used for the inner layer 1b.

  The resin bag 1 is elongate, and a partition 2 is provided at a location about 1/3 in the longitudinal direction to partition the powder container 3 and the liquid container 4. The partition part 2 is formed by heat-welding the inner layer 1b of the resin bag 1. The partition portion 2 is an easy peel portion having a thermal welding force that is not torn even when a certain external force is applied (the tear 5 does not occur) but is torn only when a strong external force of a predetermined level or more is applied.

  In the example shown in FIG. 1 (a), the partition 2 is thermally welded in an oblique band shape, but it is also possible to thermally weld it in a parallel belt shape, or in a V shape, a corrugated shape, or other shapes. You can also. For example, by making the partition part 2 V-shaped and tapering a part thereof, when pressure (external force) is applied to the resin bag 1 from the outside, the external force is concentrated on the tapered part and the partition part 2 is opened ( Breakage). When the width of the partition part 2 is narrow, it may be partially damaged or peeled by an external force applied inadvertently, and the water W in the liquid storage part 4 may flow into the powder storage part 3 in which the gypsum powder P is stored. . In order to prevent this, it is desirable that the partition portion 2 has a fusion strength and a width that do not cause such breakage or peeling. In some cases, the partition portion 2 can be provided at two locations slightly apart in the longitudinal direction of the resin bag 1 (doublely provided) to keep it from being damaged. The weld strength of the partition portion 2 is weaker than the seal strength (weld strength) of the peripheral portion, so that even if the weld of the partition portion 2 is damaged by force, the seal (weld) of the peripheral portion is not damaged.

  The resin bag 1 is preferably flexible and thick enough to stagnate. As an example, a resin bag 1 shown in FIGS. 1A to 1C is an example in which a nylon film having a thickness of 15 μm is used for the outer layer 1a and a polyethylene film having a thickness of 30 μm is used for the inner layer 1b. For example, the outer layer 1a may be a nylon film having a thickness of 15 μm, and the inner layer 1b may be a polyethylene film having a thickness of 50 μm.

  The size of the resin bag 1 can be appropriately designed depending on the amount of gypsum powder P and water W to be accommodated. For example, in the case of 50 g for containing 50 g of gypsum powder P, the length is 180 mm to 250 mm × 55 mm to When about 75 mm (more preferably about 200 mm long × 70 mm wide) is used for 100 g containing 100 g of gypsum powder P, about 230-300 mm long × 65-90 mm wide is suitable. In any case, when the above-mentioned amount of dental powder is stored in the powder storage unit 3 and the liquid mixing unit 4 stores a liquid with the required water mixture ratio, an adult woman can hold it with one hand. It is preferable that the size is as large as possible (with width and thickness).

  The inner layer 1b of the resin bag 1 preferably has an arcuate shape (with an R) as shown in FIG. By making the corners arc, it is difficult for the gypsum powder P to accumulate in the four corners of the inner layer 1b, and the powder that is not kneaded can be prevented from remaining. A cut portion 6 is formed in a part (for example, a corner portion) of the resin bag 1, and when the cut portion 6 is cut, an outlet (not shown) is opened (formed) in the resin bag 1. It is preferable to do so. After the gypsum powder P and the water W are kneaded into a paste, the cut portion 6 is cut out to form an outlet, and the paste-like kneaded gypsum (kneaded material) can be squeezed out (extruded) from the outlet.

[Dental powder / liquid]
In this embodiment, the case where the gypsum powder P is accommodated in the powder accommodating portion 3 is described as an example. However, the powder accommodating portion 3 accommodates an alginate powder for taking an impression or other dental powder. You can also Moreover, although the case where purified water is stored in the liquid storage unit 4 is taken as an example, pure water or tap water can also be stored. In some cases, a trace amount of a curing accelerator and a curing retarder can be dissolved in water. Examples of the hardening accelerator for gypsum include alkali metal sulfates such as sodium sulfate and potassium sulfate, calcium chloride, and sodium chloride (salt content). Examples of the setting retarder for gypsum include colloidal substances that slow the diffusion rate such as starch and glue, organic acids such as acetic acid and salts thereof, and boric acid. Boric acid is highly effective as a curing retarder, and if the concentration is changed at 2% or less, curing can be delayed for a desired time.

  The water W may basically be at room temperature, but water (hot water) or cold water (cold water) warmer than room temperature can be accommodated. When the temperature of water is high, the curing time of the gypsum powder P can be promoted more than when the temperature is low, and the curing time can be shortened. Therefore, if possible, the resin bag 1 can be heated by using a heat-resistant resin film that can be heated. When the temperature of water is low, the setting time of the gypsum powder P can be delayed as compared with the case where the temperature is high.

[Mixed water ratio]
The mixed water ratio (W / P; weight ratio) of gypsum powder P and water W accommodated in the accommodating parts 3 and 4 is in the range of 0.19 to 0.55 (19 to 55%) depending on the type of gypsum powder P. Can be selected. For example, when ordinary gypsum (powder) is stored in the powder container 3, mixing is easy when the mixed water ratio is about 45%, and when mixed gypsum (powder) is stored in the powder container 3, the mixed water ratio When it is about 23%, kneading is easy. Since the mixed water ratio varies depending on the dental powder to be used, it can be appropriately changed according to the dental powder used, but the kneaded gypsum tends to break like a powder when the mixed water ratio is lower than 0.19, 0.55 If it becomes higher than this, it will become harder and harder. For this reason, in any case, it is preferable to select the mixed water ratio in the range of 0.19 to 0.55 (19 to 55%).

  The amount of gypsum powder P to be stored in the powder storage unit 3 is the amount that can be used up at one time or the amount that does not become too short (doesn't be too much) (one use amount). Is preferred. By putting the amount of use once, it is possible to save time and labor for measuring the gypsum powder P, and it is possible to reduce the excess amount of the kneaded gypsum powder P and prevent the gypsum powder P from being wasted. However, the amount of use at one time varies depending on the width and depth of the treatment site, and two or more molds may be taken or filled in two or more molds at one time. The amount is not limited to the amount required for one mold, or the amount to be filled in one mold. For example, the amount to be used at one time is set as a reference amount such as 50 g or 60 g, and other than the reference amount It is possible to prepare and measure several types of dental materials 10 in bags with different quantities by preliminarily measuring and filling them, such as 75 g or 100 g.

(Embodiment 2 of the dental material in a bag)
Another example of the embodiment of the bag-containing dental material 10 of the present invention will be described with reference to FIG. The basic structure of the bag-type dental material 10 of this embodiment is the same as that of the bag-type dental material 10 of the first embodiment. The difference is that the sphere 7 is housed together with the gypsum powder P or the water W in the powder container 3 and / or the liquid container 4. The sphere 7 is preferably a metal or resin sphere, and its diameter is preferably about several mm. The gypsum powder P and the water W are easily kneaded by inserting the sphere 7. Two or more spheres 7 can be accommodated. The two or more spheres 7 may have the same shape or different shapes, and may have the same shape or different sizes.

(Other embodiment of dental material in a bag)
It is desirable that the powder container 3 and the liquid container 4 of the bag-containing dental material 10 be in a vacuum state (including a substantially vacuum state) if possible. By adopting a vacuum state (a state in which no air is mixed), no bubbles are generated in the paste-like material being kneaded, and an improvement in the quality of the kneaded material can be expected. In addition, the defoaming work that has been necessary until now becomes unnecessary, and improvement in workability can be expected.

  In the said embodiment, although the case where the resin bag 1 and the accommodating parts 3 and 4 are elongate is demonstrated as an example, they may be another shape. Further, since the amount of the necessary material varies depending on the patient, several types of bag-type dental materials 10 having different amounts can be prepared in advance so that they can be selectively used according to the situation.

(Production method for dental materials in bags)
The dental material 10 in the bag shown in FIGS. 1 (a) to 1 (c) and FIG. 2 is the first to accommodate dental powder in the powder container 3 and liquid in the liquid container 4. It may be done at the same time if possible. In any case, after the accommodation, the respective openings of the powder container 3 and the liquid container 4 are heat-sealed and sealed. This thermal welding and the thermal welding around the resin bag 1 are made stronger than the thermal welding of the partition part 2 so that even if the partition part 2 is damaged by an external force, the thermal welding of the periphery and the opening is not damaged. To do.

(Example of using dental materials in bags)
An example of using the bag-containing dental material 10 of the present invention will be described. This use example is an example in which the gypsum powder P and the water W are kneaded in the resin bag 1.
(1) A partition between the powder container 3 and the liquid container 4 by applying an external force to the resin bag 1 by pressing the resin bag 1 (FIG. 3A) of the prepared dental material 10 in the bag from the outside. All or a part of the part 2 is broken (broken), and a slit 5 (FIG. 3B) is inserted to allow the powder container 3 and the liquid container 4 to communicate with each other.
(2) The gypsum powder P and water W accommodated in the powder accommodating part 3 and the liquid accommodating part 4 are merged in the resin bag 1 from the tear (communication part) 5 (FIG. 3B). When the rift 5 is partially inserted, the rift 5 spreads, and finally the entire partition 2 is opened and communicated.
(3) Holding the resin bag 1 by hand, holding the resin bag 1 by hand from the outside, kneading the gypsum powder P and water W in the resin bag 1 to form a paste (FIG. 3). (C)). The hardness of the paste varies depending on the type of powder and the water mixing ratio. The resin bag 1 can be held and held with one hand or both hands.
(4) The cut portion 6 of the resin bag 1 is cut out, the resin bag 1 is pushed by hand from the outside, and paste-like kneaded gypsum is pushed out from the opened cut portion 6 and poured into a mold. The poured gypsum that has been poured is cured to complete the dental model. When the powder in the powder container 3 is an alginate powder, the powder is squeezed out from the resin bag 1 and placed in a tray. In addition, when the spherical body 7 is contained in the powder storage part 3 or the liquid storage part 4, it is preferable to extrude the kneaded gypsum in a state in which the spherical body 7 is picked with a finger so as not to come out of the resin bag 1.
(5) When kneaded gypsum or kneaded alginate remains, the resin bag 1 is disposed of as non-combustible material (discarded).

  When the inside of the resin-made bag 1 of the bag-containing dental material 10 according to the present invention is in a vacuum state (including a substantially vacuum state), by carrying out the mixing in the resin-made bag 1, bubbles are formed in the paste-like kneading material. Can be expected to improve the quality of molded models and impression materials (not easily cracked or chipped). In addition, the defoaming work that has been necessary until now becomes unnecessary, and improvement in workability can be expected.

  The above-mentioned use example is an example, and can be used by other methods. Moreover, it can be used by the same method also when mixing gypsum powder P and water W using the dental material 10 in a bag shown in FIG.

(Embodiment of dental powder kneading method)
The dental powder kneading method of the present invention will be described. The dental powder kneading method of the present invention is a method of kneading dental powder (for example, gypsum powder P or alginate powder) and a liquid (for example, water W) into a paste, and uses the bag-shaped dental material 10. Then, holding the dental material 10 in the bag and applying an external force to the resin bag 1 to open or damage all or part of the partition part 2, the dental powder and liquid container in the powder container 3 The liquid in 4 is merged. Thereafter, the resin bag 1 is held by hand, and the dental powder and the liquid merged in the resin bag 1 are kneaded to form a paste. Thereafter, the cut portion 6 of the resin bag 1 is opened, and the kneaded dental material can be pushed out from the opening portion by pushing the resin bag 1 by hand.

(Embodiment of dental impression taking method)
The dental impression taking method of the present invention will be described. The dental impression taking method of the present invention is a method of taking an impression by placing a kneaded alginate obtained by kneading a paste of alginate powder and a liquid (for example, water W) into a dental tray. The paste-like kneaded alginate obtained by the dental powder kneading method is pushed out of the opening of the resin bag 1 by manually pushing the resin bag 1 kneaded with the kneaded alginate, and is placed in the dental tray. It is a method of taking an impression.

(Embodiment of dental model manufacturing method)
The dental model manufacturing method of the present invention will be described. The method for producing a dental model of the present invention is a method for producing a dental model by filling a dental mold with kneaded gypsum obtained by kneading gypsum powder P, which is a dental powder, and a liquid (for example, water W) into a paste. The paste-like kneaded gypsum obtained by the dental powder kneading method is pushed out of the opening of the bag by pushing the bag used for kneading the kneaded gypsum into the dental mold. It is a method of filling and producing a dental model.

  In the said embodiment, although the case where gypsum (all powder) and water, such as normal gypsum, hard plaster, and super hard gypsum, and water are accommodated in one resin bag 1, is demonstrated as an example, the bag of this invention is contained. In addition to the plaster, the dental material 10 can also contain an alginate powder and water used as an impression-taking material (impression material) and other powders and liquids other than water.

1 Resin bag 1a Outer layer (base material)
1b Inner layer 2 Partition (thermal welding part)
3 Powder container 4 Liquid container 5 Crack (communication part)
6 Cutting part 7 Sphere 10 Dental material in bag P Gypsum powder (dental powder)
W Water (liquid)

The present invention relates to agitation and mixing (usually referred to as “mixing”) of gypsum powder and liquid (usually water) used as a model material in dentistry, and an alginate powder used as an impression material for taking an impression. A disposable dental material in a bag that can be easily stirred and mixed (usually called “kneading”) with a liquid (usually water) and a dental tray that uses the disposable dental material in the bag The present invention relates to a method for assembling impression collecting materials and a method for producing a dental model. Hereinafter, the “mixing” and “kneading” are collectively referred to as “kneading”.

  In dentistry, gypsum is used as a model material, and alginate is used as an impression material for taking an impression. Gypsum and alginate are used in a powder form (gypsum powder, alginate powder) and kneaded with water to form a paste (various hardness).

  In order to knead dental powder such as gypsum powder and alginate powder and water, the dental powder and water are mixed with a predetermined water mixture ratio (usually, the dental powder is used for a single amount of dental powder. It is put in a container (usually a rubber ball) with a specified amount of water determined for each powder) and kneaded for several minutes (usually about 1 to 2 minutes) in a rubber ball using a stirring rod or the like. Since this kneading is performed in the air, air (bubbles) may be mixed in the kneaded material during kneading. Since air contributes to cracks, defects, etc. of the dental model, a paste-like kneading material is used as a model material or an impression material after performing a defoaming operation by vibrating a rubber ball with a vibrator. The surplus kneading material remaining after use is poured into a sink and collected by a gypsum trap, or removed from the container after disposal and discarded.

Another of the mixing kneading method, a method of kneading by adding an aqueous emulsion emulsified silicone oil in nonionic surfactant (Patent Document 1) and, a method of kneading by using a vacuum mixer (Non-Patent Document 1) Are known. Also, in fields other than dental use, in order to facilitate the measurement and mixing, one bag is partitioned to store facial liquid and absorbent cotton separately (Patent Document 2), and one bag is partitioned. In other words, there is a powder containing a bleaching powder and an aqueous liquid separately (Patent Document 3).

JP-A-5-155731 JP 2004-42951 A JP 2005-145543 A Product introduction page on the website of Nippon Dental Trading Co., Ltd. (URL: http://www.dentalsupply.co.jp/seihin/ren/001.html)

The conventional methods for kneading dental powder and water have the following problems.
(1) Since the dental powder and water are kneaded in the atmosphere (inside the indoor ball), the dental powder is likely to be scattered in the air during the kneading, and the operator may inhale the scattered powder. Since gypsum is a mineral mainly composed of calcium sulfate (CaSO4) and has an adverse effect on the human body, it is not preferable to inhale scattered powder.
(2) If the mixing ratio of dental powder and water is inaccurate, the kneaded material may be expanded or contracted. However, since the accuracy (accuracy) of the mixed water ratio varies depending on the skill level of the worker, the quality of the obtained kneaded material varies depending on the worker kneading.
(3) Since it is difficult to prevent air bubbles from being mixed at the time of kneading, defoaming work using a vibrator or the like after kneading is indispensable and time-consuming and troublesome.
(4) If the excess kneaded material is flowed as it is, the water supply pipes will be clogged, so it is treated with a gypsum trap. However, the introduction of the gypsum trap and the maintenance of the gypsum trap require time and cost. is there.
(5) Rubber balls must be washed after each use and are troublesome.
(6) The apparatus such as the vacuum stirrer described in Non-Patent Document 1 requires a lot of cost for its introduction and maintenance.

The objective of this invention is providing the disposable dental material in a bag which can solve the said subject, the impression acquisition material mounting method to a dental tray, and the dental model production method.

[ Disposable dental materials in bags]
Bags disposable dental material of the present invention is a dental powder and liquid single bags disposable dental material contained in the bag is kneaded, the bag is at the outer and the inner layer is two or more layers laminated and the inner layer is thermally weldable laminate resin film at a lower temperature than the outer layer, the bag is the inner layer to each other are partitioned by a partition portion which is more sealed to thermal fusion, with the powder containing portion and the liquid storage portion, The horizontal width of the powder storage portion and the liquid storage portion is the same or substantially the same, the length in the connecting direction of both storage portions is elongated longer than the horizontal width of the powder storage portion and the liquid storage portion, the partition portion of the bag a weak seal strength than the seal strength of the peripheral portion, dental where the liquid storage portion and the powder housing part by pushing the bag damage and Ru added external force is communicated, are accommodated in the respective receptacle There Le intensity - sheet of powder and liquid can be merged The powder accommodating portion is wide to accommodate sealing a dental powder single usage, mixed required for kneading the dental powder single usage liquid storage portion is accommodated in the powder housing unit The dental powder is a dental alginate powder, and a single-use amount of dental alginate powder is contained and sealed in the powder container, and the liquid is stored in the powder container. A single use amount of liquid is stored and sealed in the storage portion, and the single use amount of the dental alginate powder is a single impression collection material kneaded with the liquid in the bag or in the form of a paste. It is the amount that can be used up by placing it in several dental trays, and the one-time use amount of the liquid is kneaded with the single-use dental alginate powder contained in the powder container, Use the powder as a paste-like impression-taking material Is the amount of mixing water ratio required for that, the bag is a flexible dental alginate powder and liquid is kneaded worker crumpled by hand can be made by mixing kneaded paste impression obtained material A packaged bag that has strength that does not break even if it is swollen, and that contains and seals a single-use amount of dental alginate powder in the powder container, and contains a liquid in an amount of the mixed water ratio in the liquid container. The width and thickness of the kneading operator that can be grasped with one hand and squeezed from the outside with one hand, and the impression-collecting material that has been kneaded in the bag and formed into a paste, opens a part of the bag. extruded through the opening and is an amount that can be used up one or directly Serve in the several in dental tray, impression Tokuzai remains in a bag after Serve in said dental tray, industrial bags use a small amount that can be discarded each bag as waste It is a discarded dental material.

Bags disposable dental material of the present invention is a dental powder and liquid single bags disposable dental material contained in the bag is kneaded, the bag is at least two layers of outer and inner layers are stacked and the inner layer is thermally weldable laminate resin film at a lower temperature than the outer layer, the bag is the inner layer to each other are partitioned by a partition portion which is more sealed to thermal fusion, with the powder containing portion and the liquid storage portion, The horizontal width of the powder storage portion and the liquid storage portion is the same or substantially the same, the length in the connecting direction of both storage portions is elongated longer than the horizontal width of the powder storage portion and the liquid storage portion, the partition portion of the bag a weak seal strength than the seal strength of the peripheral portion, dental where the liquid storage portion and the powder housing part by pushing the bag damage and Ru added external force is communicated, are accommodated in the respective receptacle There Le intensity - sheet of powder and liquid can be merged The powder accommodating portion is wide to accommodate sealing a dental powder single usage, mixed required for kneading the dental powder single usage liquid storage portion is accommodated in the powder housing unit a wide to accommodate sealing liquid amount of water ratio, the dental powder is dental gypsum powder, dental plaster powder single usage housed sealed to the powder receptacle, the liquid A single use amount of liquid is stored and sealed in the storage portion, and the single use amount of the dental gypsum powder is one or several pieces of dental plaster kneaded with the liquid in the bag. It is an amount that can be used up by filling in a single dental model, and the single use amount of the liquid is kneaded with a single use amount of dental plaster powder contained in a powder container, The amount of water mixture required to make the powder into paste-like dental plaster, Has a strength not to be damaged even massaged and flexibility to kneading operator to dental plaster powder and liquid by mixing kneaded paste dental plaster rub hand, once the powder receptacle The used bag containing dental gypsum powder that is contained and sealed and the liquid containing part containing the amount of liquid in the mixed water ratio is held by the kneading operator with one hand and squeezed from the outside. it is the width and thickness, dental plaster became are kneaded to a paste in the bag is extruded from the opening open part of the bag, one or several dental model of The amount of dental plaster that remains in the bag after filling into the dental model is a small amount of disposable dental material in a bag that can be discarded together with the bag as industrial waste. is there.

Bags disposable dental material of the present invention, in the bag containing disposable dental material, the laminated resin film and the inner layer is a bag containing disposable dental material is a heat weldable easy peel fill at a lower temperature than the outer layer You can also.

Bags disposable dental material of the present invention, in the bag containing disposable dental materials, liquid contained sealed in the liquid containing portion is may be water containing curing accelerators or retarders.

The bag-type disposable dental material of the present invention is the above-mentioned bag-type disposable dental material. When the size of the powder container is 50 g of dental powder, the length of 180 mm to 250 mm × width of 55 mm to 75 mm, 100 g of dental When containing the powder for use, the length may be 230 to 300 mm × width 65 to 90 mm.

Bags disposable dental material of the present invention, in the bag containing disposable dental material, capacity of liquid contained sealed storage amount and the liquid containing portion of the dental powder housed sealed powder receptacle is water mixture The amount can be selected within a range of 19-55%.

[How to put impression collecting material on dental trays]
The method of assembling an impression collecting material on a dental tray of the present invention is a method for placing an impression collecting material in a paste form by kneading a powder and liquid for obtaining a dental impression into a dental tray. In the impression collection material assembling method, the bag-type disposable dental material according to any one of claims 1 or 3 to 6 is used, and an external force is applied to the resin-made bag of the bag-type disposable dental material. To open the whole or a part of the partition, join the dental alginate powder in the powder container and the liquid in the liquid container, hold the resin bag by hand and hold it with the hand. The dental alginate powder and liquid merged in the resin bag are kneaded into a paste-like impression collecting material, a part of the resin bag is opened, and the resin bag is hand-held. press in, the paste-like impression obtained material A impression obtained material dishing method to a dental tray impression provides Serve directly extruded into the dental tray from the mouth.

[Dental model production method]
Dental model fabrication method of the present invention is a method of making a dental model by filling the dental plaster powder and liquid paste kneading was kneaded dental plaster within a dental mold, according claim 2 The disposable dental material in a bag according to any one of items 6 is used, and an external force is applied to the resin-made bag of the disposable dental material in the bag to open all or a part of the partition portion, thereby containing powder. is combined with the liquid in the dental plaster powder and liquid storage portion of the portion, massaged from outside of the bag holding in his hand and manually grasped the resin bag, dental that the merging in the resin bag Gypsum powder and liquid are kneaded into paste-like gypsum, a part of the resin bag is opened, the resin bag is pushed by hand, and the paste-like gypsum is pushed out from the opening into the dental mold. It is a method of making a dental model by directly filling.

The bag-type disposable dental material of the present invention has the following effects.
(1) Since dental powder and liquid are stored in a single resin bag with a predetermined mixed water ratio, both do not need to be measured and mixed water regardless of the skill level of the operator. You can make models and impressions with accurate ratios.
(2) Kneading the dental powder and liquid in the resin bag in the resin bag by applying an external force to the resin bag to open the partition and pinching the resin bag from the outside. Since it can be made into a paste-like kneading material, the dental powder does not scatter in the air, and there is no adverse effect on the human body due to the operator inhaling the dental powder.
(3) Since kneading can be performed without opening the resin bag, air does not enter the resin bag during kneading, and there is no need for defoaming. The dental model molded with the kneading material is almost free from quality deterioration (cracking, chipping, etc.) due to air mixing.
(4) Since it is not necessary to use a rubber ball for kneading dental powder and liquid, there is no trouble of washing the rubber ball.
(5) Since the amount of dental powder and liquid that can be used up once is stored in the resin bag, there is little waste of materials.
(6) When the paste-like kneading material is left, the surplus kneading material can be disposed of together with the resin bag, so that disposal after use is easy.
(7) When spheres are stored together with dental powder or liquid in either or both of the powder storage section and the liquid storage section, no lumps are likely to occur during kneading.
(8) When a curing accelerator or a curing retarder is added to the liquid, the curing speed of the dental powder can be adjusted according to the application, so that it is easy to perform a mold making operation or a dental model manufacturing operation. By the way, in the case of containing sugar, curing is delayed, and in the case of containing salt, curing is accelerated.

In the present invention, since the disposable dental material contained in the bag is used, neither the container nor the metering is necessary for kneading, and it can be easily kneaded simply by pinching the resin bag, and the dental powder does not scatter and has an adverse effect on the human body. In addition, it is difficult for air bubbles to be mixed during kneading, waste of the kneading material is small, and disposal of surplus kneading material becomes easy.

  In the present invention, since a kneaded alginate kneaded into a paste is used, a dental impression can be easily obtained.

  Since the dental model manufacturing method of the present invention uses the kneaded plaster kneaded into a paste by the dental powder kneading method, a dental model can be easily manufactured.

An example of the bag-type disposable dental material of this invention is shown, Comprising: (a) is the front view, (b) is a XX arrow view of (a), (c) is A of (b). Part detail drawing. The front view which shows the other example of the disposable dental material with a bag of this invention, Comprising: An example at the time of accommodating a spherical body with powder in the powder accommodating part. It is explanatory drawing which shows an example of the usage method of the bag-type disposable dental material in this invention, Comprising: (a) is explanatory drawing which shows the state from which the dental powder and the liquid were isolated by the partition part, (b) is resin Explanatory drawing which pushes a bag making by hand from the outside, and joins a dental powder and a liquid, (c) is explanatory drawing which shows the state which knead | mixes dental powder and a liquid by holding a resin bag by the hand from the outside.

(Embodiment 1 of disposable dental material in a bag)
An example of the embodiment of the bag-type disposable dental material 10 of the present invention will be described with reference to FIGS. 1 (a) to 1 (c), a disposable dental material 10 in a bag is divided into a powder container 3 and a liquid container 4 by dividing a resin bag 1 by a partition part (thermal welding part) 2, and powder. Gypsum powder P is stored as dental powder in the storage unit 3, and water (purified water) W is stored as liquid in the liquid storage unit 4. Examples of the gypsum used in the present invention include ordinary gypsum, hard gypsum, and super hard gypsum.

[Resin bag]
The resin bag 1 has a peripheral portion of a laminated film of two or more layers provided with at least an outer layer (base material) 1a and an inner layer 1b, and the inner layers 1b facing each other in the inner space of the peripheral portion are thermally welded. A powder container 3 and a liquid container 4 are formed by being partitioned by the partition 2. Although various resin-made things can be used for a laminated film, as an example, the outer layer 1a is suitable for nylon, and the interior 1b is suitable for an easy peel film of polyethylene (PE). Nylon has a higher heat welding temperature than polyethylene and is superior in strength. Polyethylene has a heat welding temperature lower than that of nylon, and easily peels off (appropriately peelable) when an external force is applied to the resin bag 1 after heat welding. The material of the laminated film may be other than the above, and polypropylene (PP), polyethylene, vinyl chloride resin or the like may be used for the outer layer 1a, and a resin having a lower heat welding temperature than those may be used for the inner layer 1b.

  The resin bag 1 is elongate, and a partition 2 is provided at a location about 1/3 in the longitudinal direction to partition the powder container 3 and the liquid container 4. The partition part 2 is formed by heat-welding the inner layer 1b of the resin bag 1. The partition portion 2 is an easy peel portion having a thermal welding force that is not torn even when a certain external force is applied (the tear 5 does not occur) but is torn only when a strong external force of a predetermined level or more is applied.

  In the example shown in FIG. 1 (a), the partition 2 is thermally welded in an oblique band shape, but it is also possible to thermally weld it in a parallel belt shape, or in a V shape, a corrugated shape, or other shapes. You can also. For example, by making the partition part 2 V-shaped and tapering a part thereof, when pressure (external force) is applied to the resin bag 1 from the outside, the external force is concentrated on the tapered part and the partition part 2 is opened ( Breakage). When the width of the partition part 2 is narrow, it may be partially damaged or peeled by an external force applied inadvertently, and the water W in the liquid storage part 4 may flow into the powder storage part 3 in which the gypsum powder P is stored. . In order to prevent this, it is desirable that the partition portion 2 has a fusion strength and a width that do not cause such breakage or peeling. In some cases, the partition portion 2 can be provided at two locations slightly apart in the longitudinal direction of the resin bag 1 (doublely provided) to keep it from being damaged. The weld strength of the partition portion 2 is weaker than the seal strength (weld strength) of the peripheral portion, so that even if the weld of the partition portion 2 is damaged by force, the seal (weld) of the peripheral portion is not damaged.

  The resin bag 1 is preferably flexible and thick enough to stagnate. As an example, a resin bag 1 shown in FIGS. 1A to 1C is an example in which a nylon film having a thickness of 15 μm is used for the outer layer 1a and a polyethylene film having a thickness of 30 μm is used for the inner layer 1b. For example, the outer layer 1a may be a nylon film having a thickness of 15 μm, and the inner layer 1b may be a polyethylene film having a thickness of 50 μm.

  The size of the resin bag 1 can be appropriately designed depending on the amount of gypsum powder P and water W to be accommodated. For example, in the case of 50 g for containing 50 g of gypsum powder P, the length is 180 mm to 250 mm × 55 mm to When about 75 mm (more preferably about 200 mm long × 70 mm wide) is used for 100 g containing 100 g of gypsum powder P, about 230-300 mm long × 65-90 mm wide is suitable. In any case, when the above-mentioned amount of dental powder is stored in the powder storage unit 3 and the liquid mixing unit 4 stores a liquid with the required water mixture ratio, an adult woman can hold it with one hand. It is preferable that the size is as large as possible (becomes width and thickness).

  The inner layer 1b of the resin bag 1 preferably has an arcuate shape (with an R) as shown in FIG. By making the corners arc, it is difficult for the gypsum powder P to accumulate in the four corners of the inner layer 1b, and the powder that is not kneaded can be prevented from remaining. A cut portion 6 is formed in a part (for example, a corner portion) of the resin bag 1, and when the cut portion 6 is cut, an outlet (not shown) is opened (formed) in the resin bag 1. It is preferable to do so. After the gypsum powder P and the water W are kneaded into a paste, the cut portion 6 is cut out to form an outlet, and the paste-like kneaded gypsum (kneaded material) can be squeezed out (extruded) from the outlet.

[Dental powder / liquid]
In this embodiment, the case where the gypsum powder P is accommodated in the powder accommodating portion 3 is described as an example. However, the powder accommodating portion 3 accommodates an alginate powder for taking an impression or other dental powder. You can also Moreover, although the case where purified water is stored in the liquid storage unit 4 is taken as an example, pure water or tap water can also be stored. In some cases, a trace amount of a curing accelerator and a curing retarder can be dissolved in water. Examples of the hardening accelerator for gypsum include alkali metal sulfates such as sodium sulfate and potassium sulfate, calcium chloride, and sodium chloride (salt content). Examples of the setting retarder for gypsum include colloidal substances that slow the diffusion rate such as starch and glue, organic acids such as acetic acid and salts thereof, and boric acid. Boric acid is highly effective as a curing retarder, and if the concentration is changed at 2% or less, curing can be delayed for a desired time.

  The water W may basically be at room temperature, but water (hot water) or cold water (cold water) warmer than room temperature can be accommodated. When the temperature of water is high, the curing time of the gypsum powder P can be promoted more than when the temperature is low, and the curing time can be shortened. Therefore, if possible, the resin bag 1 can be heated by using a heat-resistant resin film that can be heated. When the temperature of water is low, the setting time of the gypsum powder P can be delayed as compared with the case where the temperature is high.

[Mixed water ratio]
The mixed water ratio (W / P; weight ratio) of gypsum powder P and water W accommodated in the accommodating parts 3 and 4 is in the range of 0.19 to 0.55 (19 to 55%) depending on the type of gypsum powder P. Can be selected. For example, when ordinary gypsum (powder) is stored in the powder container 3, mixing is easy when the mixed water ratio is about 45%, and when mixed gypsum (powder) is stored in the powder container 3, the mixed water ratio When it is about 23%, kneading is easy. Since the mixed water ratio varies depending on the dental powder to be used, it can be appropriately changed according to the dental powder used, but the kneaded gypsum tends to break like a powder when the mixed water ratio is lower than 0.19, 0.55 If it becomes higher than this, it will become harder and harder. For this reason, in any case, it is preferable to select the mixed water ratio in the range of 0.19 to 0.55 (19 to 55%).

  The amount of gypsum powder P to be stored in the powder storage unit 3 is the amount that can be used up at one time or the amount that does not become too short (doesn't be too much) (one use amount). Is preferred. By putting the amount of use once, it is possible to save time and labor for measuring the gypsum powder P, and it is possible to reduce the excess amount of the kneaded gypsum powder P and prevent the gypsum powder P from being wasted. However, the amount of use at one time varies depending on the width and depth of the treatment site, and two or more molds may be taken or filled in two or more molds at one time. The amount is not limited to the amount required for one mold, or the amount to be filled in one mold. For example, the amount to be used at one time is set as a reference amount such as 50 g or 60 g, and other than the reference amount It is possible to prepare and measure several types of dental materials 10 in bags with different quantities by preliminarily measuring and filling them, such as 75 g or 100 g.

(Embodiment 2 of disposable dental material in a bag)
Another example of the embodiment of the bag-type disposable dental material 10 of the present invention will be described with reference to FIG. The basic structure of the bag-type disposable dental material 10 of this embodiment is the same as the bag-type dental material 10 of the first embodiment. The difference is that the sphere 7 is housed together with the gypsum powder P or the water W in the powder container 3 and / or the liquid container 4. The sphere 7 is preferably a metal or resin sphere, and its diameter is preferably about several mm. The gypsum powder P and the water W are easily kneaded by inserting the sphere 7. Two or more spheres 7 can be accommodated. The two or more spheres 7 may have the same shape or different shapes, and may have the same shape or different sizes.

(Other embodiments of disposable dental material in a bag)
It is desirable to keep the inside of the powder container 3 and the liquid container 4 of the bag-type disposable dental material 10 in a vacuum state (including a substantially vacuum state) if possible. By adopting a vacuum state (a state in which no air is mixed), no bubbles are generated in the paste-like material being kneaded, and an improvement in the quality of the kneaded material can be expected. In addition, the defoaming work that has been necessary until now becomes unnecessary, and improvement in workability can be expected.

In the said embodiment, although the case where the resin bag 1 and the accommodating parts 3 and 4 are elongate is demonstrated as an example, they may be another shape. Further, since the amount of necessary material varies depending on the patient, several types of bag-type disposable dental materials 10 having different amounts can be prepared in advance so that they can be selectively used according to the situation.

(Production method for disposable dental materials in bags)
The disposable dental material 10 in a bag shown in FIGS. 1 (a) to 1 (c) and FIG. 2 is the first to accommodate dental powder in the powder container 3 and liquid in the liquid container 4. If possible, they may be performed simultaneously. In any case, after the accommodation, the respective openings of the powder container 3 and the liquid container 4 are heat-sealed and sealed. This thermal welding and the thermal welding around the resin bag 1 are made stronger than the thermal welding of the partition part 2 so that even if the partition part 2 is damaged by an external force, the thermal welding of the periphery and the opening is not damaged. To do.

(Usage example of disposable dental materials in bags)
The usage example of the bag-type disposable dental material 10 of this invention is demonstrated. This use example is an example in which the gypsum powder P and the water W are kneaded in the resin bag 1.
(1) The resin bag 1 (FIG. 3 (a)) of the prepared disposable dental material 10 with bag is pushed from the outside to apply an external force to the resin bag 1, and between the powder container 3 and the liquid container 4 The whole or a part of the partition part 2 is damaged (damaged), the slit 5 (FIG. 3B) is inserted, and the powder container 3 and the liquid container 4 are communicated.
(2) The gypsum powder P and water W accommodated in the powder accommodating part 3 and the liquid accommodating part 4 are merged in the resin bag 1 from the tear (communication part) 5 (FIG. 3B). When the rift 5 is partially inserted, the rift 5 spreads, and finally the entire partition 2 is opened and communicated.
(3) Holding the resin bag 1 by hand, holding the resin bag 1 by hand from the outside, kneading the gypsum powder P and water W in the resin bag 1 to form a paste (FIG. 3). (C)). The hardness of the paste varies depending on the type of powder and the water mixing ratio. The resin bag 1 can be held and held with one hand or both hands.
(4) The cut portion 6 of the resin bag 1 is cut out, the resin bag 1 is pushed by hand from the outside, and paste-like kneaded gypsum is pushed out from the opened cut portion 6 and poured into a mold. The poured gypsum that has been poured is cured to complete the dental model. When the powder in the powder container 3 is an alginate powder, the powder is squeezed out from the resin bag 1 and placed in a tray. In addition, when the spherical body 7 is contained in the powder storage part 3 or the liquid storage part 4, it is preferable to extrude the kneaded gypsum in a state in which the spherical body 7 is picked with a finger so as not to come out of the resin bag 1.
(5) When kneaded gypsum or kneaded alginate remains, the resin bag 1 is disposed of as non-combustible material (discarded).

When the inside of the resin bag 1 of the bag-type disposable dental material 10 according to the present invention is in a vacuum state (including a substantially vacuum state), by carrying out the mixing in the resin bag 1, a paste-like kneading material is obtained. It can be expected that the quality of the molded model and impression material will be improved (cracks and chips are less likely to occur) without bubbles being mixed. In addition, the defoaming work that has been necessary until now becomes unnecessary, and improvement in workability can be expected.

The above-mentioned use example is an example, and can be used by other methods. Moreover, it can be used by the same method also when mixing the gypsum powder P and the water W using the disposable dental material 10 with a bag shown in FIG.

(Embodiment of dental powder kneading method)
The dental powder kneading method of the present invention will be described. The dental powder kneading method of the present invention is a method of kneading dental powder (for example, gypsum powder P or alginate powder) and a liquid (for example, water W) into a paste, and uses the disposable dental material 10 in the bag. Then, holding the disposable dental material 10 in the hand and applying an external force to the resin bag 1 to open or damage all or part of the partition part 2, the dental powder and liquid in the powder container 3 The liquid in the container 4 is merged. Thereafter, the resin bag 1 is held by hand, and the dental powder and the liquid merged in the resin bag 1 are kneaded to form a paste. Thereafter, the cut portion 6 of the resin bag 1 is opened, and the kneaded dental material can be pushed out from the opening portion by pushing the resin bag 1 by hand.

(Embodiment of dental impression taking method)
The dental impression taking method of the present invention will be described. The dental impression taking method of the present invention is a method of taking an impression by placing a kneaded alginate obtained by kneading a paste of alginate powder and a liquid (for example, water W) into a dental tray. The paste-like kneaded alginate obtained by the dental powder kneading method is pushed out of the opening of the resin bag 1 by manually pushing the resin bag 1 kneaded with the kneaded alginate, and is placed in the dental tray. It is a method of taking an impression.

(Embodiment of dental model manufacturing method)
The dental model manufacturing method of the present invention will be described. The method for producing a dental model of the present invention is a method for producing a dental model by filling a dental mold with kneaded gypsum obtained by kneading gypsum powder P, which is a dental powder, and a liquid (for example, water W) into a paste. The paste-like kneaded gypsum obtained by the dental powder kneading method is pushed out of the opening of the bag by pushing the bag used for kneading the kneaded gypsum into the dental mold. It is a method of filling and producing a dental model.

In the said embodiment, although the case where gypsum (all powder) and water, such as normal gypsum, hard plaster, and super hard gypsum, and water are accommodated in one resin bag 1, is demonstrated as an example, the bag of this invention is contained. The disposable dental material 10 can also contain an alginate powder and water used as an impression-taking material (impression material) and other powders and liquids other than water, in addition to the plaster.

1 Resin bag 1a Outer layer (base material)
1b Inner layer 2 Partition (thermal welding part)
3 Powder container 4 Liquid container 5 Crack (communication part)
6 Cutting part 7 Sphere 10 Disposable dental material P in bag P Gypsum powder (dental powder)
W Water (liquid)

Claims (11)

In a dental material with a bag containing dental powder and liquid to be kneaded,
The bag is made of a resin film that has two or more layers including an outer layer and an inner layer, and the inner layer is heat-welded at a lower temperature than the outer layer, and includes a powder container and a liquid container.
The powder container and the liquid container are partitioned by a partition part in which the inner layers are heat-sealed, and the partition part is heat-sealed with a seal strength weaker than the seal strength of the peripheral edge of the bag,
A single use amount of dental powder is housed and sealed in the powder container, and an amount of liquid (mixed water ratio) required for kneading the dental powder is housed and sealed in the liquid container.
The partition part is communicated so that the partition part is broken by applying an external force so that the dental powder and the liquid are joined together,
When the resin bag is manually squeezed from the outside, the dental powder and liquid merged by the communication are kneaded in the resin bag.
A dental material in a bag. In the dental material according to claim 1,
The resin bag is an easy peel film in which the inner layer compartment is easily opened (including breakage) by external force,
The partition part was formed by thermally welding the inner layer,
A dental material in a bag. In the dental material according to claim 1 or 2,
The amount used once is the amount necessary for one casting when the dental powder is a gypsum powder, and the amount necessary for one molding when the dental powder is an alginate powder.
A dental material in a bag. The dental material in a bag according to any one of claims 1 to 3,
The amount of the dental material accommodated and sealed in the powder container and the amount of the liquid accommodated and sealed in the liquid container are selected in a range of 19 to 55% depending on the type of dental material. Is,
A dental material in a bag. The dental material in a bag according to any one of claims 1 to 4,
The resin bag is the size that can be kneaded with one hand and kneaded with dental powder and liquid.
A dental material in a bag. The bag-containing dental material according to any one of claims 1 to 5,
Spheres are stored together with dental powder or liquid in either or both of the powder storage section and the liquid storage section. When the spheres are kneaded with dental powder and liquid by holding a resin bag by hand, these dentists It is easy to move and knead the powder for liquid and liquid,
A dental material in a bag. In the dental material in a bag of any one of Claims 1-6,
Gypsum powder or alginate powder was stored in the powder container, and water was stored in the liquid container,
A dental material in a bag. The dental material in a bag according to claim 7,
The water contains a cure accelerator or cure retarder,
A dental material in a bag. In the method of kneading dental powder and liquid into a paste,
Use the dental material in a bag according to any one of claims 1 to 8, and apply an external force to the resin bag of the dental material in the bag to damage all or part of the partition part. The dental powder in the powder container and the liquid in the liquid container are merged,
Kneading the resin bag by hand and kneading the combined dental powder and liquid in the resin bag into a paste,
A part of the resin bag is opened, and the kneaded dental material can be pushed out from the opening by pushing the resin bag by hand.
A dental powder kneading method characterized by the above. In a method of taking an impression by arranging a kneaded alginate obtained by kneading an alginate powder and a liquid, which is a dental powder, into a paste, in a dental tray,
The paste-like kneaded alginate obtained by the dental powder kneading method according to claim 9 is pushed out of the opening of the resin bag by manually pushing the resin bag kneaded with the kneaded alginate. To collect impression material
A method for taking a dental impression. In a method for manufacturing a dental model by filling a dental mold with a kneaded gypsum obtained by kneading gypsum powder, which is a dental powder, and a liquid into a paste,
The paste-like kneaded gypsum obtained by the dental powder kneading method according to claim 9 is pushed by hand from the resin bag used for kneading the kneaded gypsum and pushed out from the opening of the resin bag, Make a dental model by filling in a dental piece,
A method for producing a dental model.

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