JP2004113332A - Dental alginate impression material for dentistries - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dental alginate impression material that solves inconvenience in terms of the kneadability and storage stability of a dental alginate impression material used for collecting the impressions of an oral cavity in a dentistry, can be uniformly mixed in a short time because powder does not easily coagulate when the dental alginate impression material powder and water are mixed and kneaded into a uniform paste, less strongly resists during kneading, and has a good storage stability before use. <P>SOLUTION: This dental alginate impression material is made by adding a 0.05 to 10 w.t.% nonreactive organopolysiloxane and a 0.01 to 10 w.t.% nonionic surface active agent to the dental alginate impression material including an alginate, a gelation reaction agent, a gelation regulator and a filler. <P>COPYRIGHT: (C)2004,JPO

Description

【００２３】
表１から明らかなように、本発明に係る歯科用アルギン酸塩印象材は、粉末と水とを練和する際にダマが練和早期に消失し、練和抵抗も市販品である比較例１よりも小さいので非常に練和し易いことが確認できた。また、保存性においても、６０℃，湿度１００％，１週間という環境下においてゲル化時間の遅延は生じないか、ごく僅かな時間しか生じないことから保存安定性は良好であることが判った。
【００２４】
【発明の効果】
以上に詳述した如く、本発明に係る歯科用アルギン酸塩印象材は、歯科用アルギン酸塩印象材の粉末と水とを混合・練和しペーストにする際に、粉末同士が凝集し難く、短時間に均一に混合でき、更に練和時の抵抗が小さく練和し易い。更に、歯科用アルギン酸塩印象材としての保存安定性が良好であるため経時変化によるゲル化時間のばらつき・遅延をも防止することが可能な歯科用アルギン酸塩印象材であり、歯科医療に貢献する価値の大なるものである。[0001]
[Industrial applications]
The present invention relates to a dental alginate impression material used for obtaining an oral impression in dentistry. More specifically, the powdered dental alginate impression material and water are mixed and kneaded, and when a uniform paste is formed, the powders are unlikely to agglomerate and can be uniformly mixed in a short time. The present invention relates to a dental alginate impression material having low resistance and good storage stability before use.
[0002]
[Prior art]
Alginate impression materials for dental use are widely used as impression materials for obtaining an impression in the oral cavity when a prosthesis is made in dentistry. This dental alginate impression material is usually in the form of a powder containing an alginate, a gelling agent, a gelling agent and a filler, and changes into a gel state and hardens when mixed with water at the time of use. At this time, the amount of the powder of the dental alginate impression material and the amount of water required for the kneading are adjusted to the respective dental alginate so as to obtain the highest operability in kneading and high performance after curing. It is specified for impression materials.
[0003]
However, the kneading operation of a conventional dental alginate impression material is a difficult operation, especially for an unskilled operator, because of the high resistance and the tendency of powder agglomeration to occur. This difficulty in kneading means that a lot of poorly kneaded dental alginate impression material remains in the kneaded material and the physical properties after curing are not sufficient, and of course, there is no unmixed material. When kneading, the kneading operation is not completed within a predetermined time, which may adversely affect the physical properties after curing. In particular, when the surgeon adjusts the amounts of water and powder according to the case and kneads them, the above problem becomes remarkable, and the performance after curing at the time of design cannot be exhibited.
[0004]
In addition, the dental alginate impression material currently used tends to change the gelation time and the fluidity of the kneaded paste by absorbing moisture during storage, and a kneaded material of stable quality can be obtained by storage. As a result, there has been a disadvantage that the obtained impression is not always reproducible.
[0005]
[Problems to be solved by the invention]
The present invention eliminates the disadvantages of the conventional dental alginate impression material for kneadability and storage stability described above, and makes it difficult for the powder of the dental alginate impression material to agglomerate when kneaded with water. Another object of the present invention is to provide a dental alginate impression material having low kneading resistance and excellent storage stability.
[0006]
[Means to solve the problem]
The present inventors have conducted intensive studies to solve the above problems, and as a result, in order to reduce the agglomeration of the powder of the dental alginate impression material and to reduce the kneading resistance, a conventional dental alginate impression material was used. It has been found that it is effective to add a predetermined amount of a non-reactive organopolysiloxane and a non-ionic surfactant to each other, and at the same time, adding a non-reactive organopolysiloxane to a dental alginate impression material. The present invention was completed by investigating that the preservability of the product was also dramatically improved.
[0007]
That is, the dental alginate impression material according to the present invention is a dental alginate impression material containing alginate, a gelling agent, a gelling modifier and a filler, and a non-reactive organopolysiloxane containing 0.05%. An alginate impression material for dental use, wherein 10 to 10% by weight of a nonionic surfactant and 0.01 to 10% by weight of a nonionic surfactant are added.
[0008]
The dental alginate impression material according to the present invention comprises an organopolysiloxane which is non-reactive with a dental alginate impression material containing alginate, a gelling agent, a gelling agent and a filler, which are conventionally used. It can also be obtained by adding a predetermined amount of each of the nonionic surfactants.
[0009]
The conventional dental alginate impression material is usually a dental alginate impression material in which at least one kind of water-soluble salt such as sodium, potassium, ammonium and triethanolamine of alginic acid is used as the alginate. It contains about 10 to 20% by weight in the material and contains a sparingly soluble metal salt having a valency of 2 or more, preferably a dihydrate or hemihydrate of calcium sulfate, as a gelling agent. At least one of sodium or potassium phosphates, silicates, carbonates, fluorides and the like is used as a regulator, and diatomaceous earth, silicic anhydride, talc, calcium carbonate, perlite, etc. are used as fillers. 1 shows a dental alginate impression material in which one or more powders of the formula (1) are used.
[0010]
The non-reactive organopolysiloxane used in the dental alginate impression material of the present invention is one of the components added to the conventional dental alginate impression material to solve the problem. This non-reactive organopolysiloxane is a linear non-reactive oil and has an organic group directly bonded to a silicon atom in the molecule. However, since this non-reactive organopolysiloxane exerts its effect by preventing other components or organopolysiloxanes from reacting with each other, the organic groups contained therein include, for example, an alkyl group such as a methyl group and an ethyl group, and a phenyl group. , Methylphenyl group, higher fatty acid, methylstyryl, polyether, etc.
[0011]
This non-reactive organopolysiloxane has an effect of remarkably reducing the agglomeration of powder particles of the dental alginate impression material, and when used together with a nonionic surfactant described later, the resistance to kneading with water is reduced. It is possible to mix easily with less. Furthermore, since this non-reactive organopolysiloxane also has the effect of reducing the moisture absorption of alginate during storage, it has the effect of improving the storage stability of the dental alginate impression material. The non-reactive organopolysiloxane is contained in the dental alginate impression material in an amount of 0.05 to 10% by weight. If it is less than 0.05% by weight, the effect of preventing agglomeration of the powder of the dental alginate impression material and the storage stability are not sufficient. If it exceeds 10% by weight, the water repellency of the powder of the dental alginate impression material is obtained. Becomes too large and the penetration of water into the powder when kneading with water is significantly reduced, making it difficult to knead.
[0012]
In the present invention, a nonionic surfactant is added together with a non-reactive organopolysiloxane. The use of this nonionic surfactant together with a non-reactive organopolysiloxane makes it possible to prevent the powder particles of the dental alginate impression material from agglomerating and to reduce the resistance during kneading. Examples of the nonionic surfactant include ether type such as polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether and polyoxyethylene polyoxyethylene block copolymer, polyoxyethylene ether of glycerin ester and polyoxyethylene of sorbitan ester. Examples thereof include ether ester types such as ethylene ether, ester types such as polyethylene glycol fatty acid esters, and nitrogen-containing nonionic surfactants such as polyoxyethylene fatty acid amide. This nonionic surfactant is contained in the dental alginate impression material in an amount of 0.01 to 10% by weight. If the amount is less than 0.01% by weight, the powder of the dental alginate impression material is likely to aggregate and the kneading resistance is increased. If the content exceeds 10% by weight, not only does storage stability deteriorate, but also the surface properties of a model prepared by injecting gypsum after taking an impression deteriorate.
[0013]
The dental alginate impression material according to the present invention contains various inorganic or organic coloring agents, liquid components such as liquid paraffin, polypropylene glycol, various disinfectants, fragrances, etc. within a range not to lose the characteristics of the present invention. Of course, it is good.
[0014]
【Example】
Next, the present invention will be described in detail with reference to examples, but the present invention is not limited to these examples.
[0015]
<Example 1>
As alginate,
13% by weight of sodium alginate
As a gelling reagent,
13% by weight calcium sulfate dihydrate
As a gelling modifier,
Sodium pyrophosphate 1% by weight
1% by weight of potassium fluorotitanate
As a filler,
Diatomaceous earth 70% by weight
As a non-reactive organopolysiloxane,
1% by weight of methylphenylpolysiloxane
As a nonionic surfactant,
Polyoxyethylene sorbitan monooleate 1% by weight
These components were thoroughly mixed in a blender to obtain a powder of a dental alginate impression material.
[0016]
17 g of the powder of the dental alginate impression material and 40 cc of water are weighed, and the same person starts kneading under a uniform condition using a spatula in a dental rubber cup. And the time until the lumps disappeared was measured. The resistance at the time of kneading was sensually evaluated in comparison with a commercially available dental alginate impression material (product name: Aromafine DFIII, manufactured by GC Corporation) which is also Comparative Example 1 to be described later. More clearly, the one with a low kneading resistance was defined as “good”, and the one with equal or higher kneading resistance was defined as “bad”. For the storage stability test, 1 kg of dental alginate impression material powder was placed in an aluminum pack, left for 1 week in an environment of 60 ° C. and 100% humidity, and the gelation time was measured according to JIST6505. Was compared with the gelation time. Table 1 shows the results.
[0017]
<Example 2>
As alginate,
Sodium alginate 14% by weight
As a gelling reagent,
15% by weight calcium sulfate dihydrate
As a gelling modifier,
Sodium pyrophosphate 1% by weight
1% by weight of potassium fluorotitanate
As a filler,
Diatomaceous earth 54% by weight
As a non-reactive organopolysiloxane,
8% by weight of methylstyryl-modified polysiloxane
As a nonionic surfactant,
7% by weight of polyoxyethylene nonyl phenyl ether
Were thoroughly mixed in a blender to obtain powder of a dental alginate impression material. The same test as in Example 1 was performed, and the results are shown in Table 1.
[0018]
<Example 3>
As alginate,
13% by weight of sodium alginate
As a gelling reagent,
14% by weight calcium sulfate dihydrate
As a gelling modifier,
1% by weight of potassium fluorotitanate
Sodium pyrophosphate 1% by weight
As a filler,
Diatomaceous earth 70.7% by weight
As a non-reactive organopolysiloxane,
Dimethylpolysiloxane 0.2% by weight
As a nonionic surfactant,
0.1% by weight of polyoxyethylene alkyl ether
Were thoroughly mixed in a blender to obtain powder of a dental alginate impression material. The same test as in Example 1 was performed, and the results are shown in Table 1.
[0019]
<Example 4>
As alginate,
Sodium alginate 14% by weight
As a gelling reagent,
15% by weight calcium sulfate dihydrate
As a gelling modifier,
Sodium pyrophosphate 1% by weight
1% by weight of potassium fluorotitanate
As a filler,
Diatomaceous earth 64.5% by weight
As a non-reactive organopolysiloxane,
Methylphenyl polysiloxane 3% by weight
As a nonionic surfactant,
1% by weight of polyoxyethylene alkyl ether
As other ingredients,
Liquid paraffin 0.5% by weight
Were thoroughly mixed in a blender to obtain powder of a dental alginate impression material. The same test as in Example 1 was performed, and the results are shown in Table 1.
[0020]
<Comparative Example 1>
A commercially available dental alginate impression material (product name: Aroma Fine DFIII, manufactured by GC Corporation) was weighed and kneaded at a powder / water ratio specified by the manufacturer, and the same test as in the example was performed. Table 1 shows the results.
[0021]
<Comparative Example 2>
As alginate,
Sodium alginate 15% by weight
As a gelling reagent,
15% by weight calcium sulfate dihydrate
As a gelling modifier,
Sodium pyrophosphate 1% by weight
1% by weight of potassium fluorotitanate
As a filler,
Diatomaceous earth 68% by weight
Were thoroughly mixed in a blender to obtain a powder of a dental alginate impression material. The same test as in Example 1 was performed, and the results are shown in Table 1.
[0022]
[Table 1]

[0023]
As is clear from Table 1, in the dental alginate impression material of the present invention, when kneading powder and water, the lumps disappeared at the early stage of kneading, and the kneading resistance was a commercial product. It was confirmed that it was very easy to mix because it was smaller. In addition, regarding the storage stability, under the environment of 60 ° C., 100% humidity and one week, the gelation time did not delay or occurred only for a very short time, indicating that the storage stability was good. .
[0024]
【The invention's effect】
As described in detail above, the dental alginate impression material according to the present invention is such that when powder and water of the dental alginate impression material are mixed and kneaded to form a paste, the powders are less likely to agglomerate and have a short duration. Mixing can be performed uniformly over time, and the resistance during kneading is small and kneading is easy. Furthermore, since the storage stability as a dental alginate impression material is good, it is a dental alginate impression material that can also prevent dispersion and delay of gel time due to aging, and contribute to dental care. It is of great value.

Claims (1)

In a dental alginate impression material containing an alginate, a gelling agent, a gelling agent and a filler, 0.05 to 10% by weight of a non-reactive organopolysiloxane and 0.01 of a nonionic surfactant are added. An alginate impression material for dental use, which is added in an amount of from 10 to 10% by weight.