JPH04149109A - Stabilizer for artificial tooth - Google Patents

Abstract

PURPOSE:To obtain a paste-like stabilizer for artificial tooth improved in extension in coating and stickiness on fingers without any problem of unpleasant feeling, unpreferable taste or oral stickiness by mixing dimethylpolysiloxane having a specific viscosity with spherical powder. CONSTITUTION:Dimethylpolysiloxane expressed by the formula (R1 and R2 are CH3 or OH; (n) is average polymerization degree of dimethylsilane group and is usually >=40) having 50-1500X10<4> centipoise viscosity at 25 deg.C preferably in an amount of 60-95wt.% per total amount of the artificial tooth stabilizer is mixed with spherical powder such as spherical silica, spherical aluminum silicate or spherical polyethylene, having 0.5-25mum averaged particle diameter, especially spherical silica in an amount of 5-30wt.% per total amount and uniformly kneaded in a machine such as Z-type kneader, together with a water-soluble polymer and a coloring agent, as necessary, to afford the objective stabilizer for artificial tooth by the same method as usual production of viscous paste. Said agent has a paste-like state when used for fixing an artificial tooth.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a paste-like denture stabilizer used for fixing dentures.

BACKGROUND OF THE INVENTION Various denture adhesives have been known for some time, and are broadly classified into powder-like and paste-like products. Powdered materials are mainly composed of water-soluble natural polymeric substances, such as karayakam, and semi-synthetic polymeric substances, such as sodium carboquine methylcellulose and sodium polyacrylate. Paste-like products include those made into a paste by mixing a water-soluble polymer substance with petrolatum, etc. (cream paste type), and those made into a paste by mixing vinyl acetate, etc. and water alcohol (vinyl acetate paste type). ). However, these denture adhesives have several problems.

For example, if a powder is used, the powder will scatter during use and end up on areas other than the intended denture. In addition, since it dissolves easily in saliva, the duration of denture fixation is short, and it may be necessary to apply it at least once a day to maintain sufficient adhesion.

Water-soluble polymer cream paste type products may have a longer fixation time than powdered ones, and may need to be applied once or twice a day to maintain sufficient adhesion during 1B. In addition, the inside of the mouth becomes oily while using the product, and after use, Vaseline remains in the mouth and causes discomfort.

The vinyl acetate paste type has a fixed duration or 1
It lasts for more than a day, is highly compatible with dentures, and sticks to the dentures after use, making it extremely difficult to remove. There is also a pungent, bad taste from the alcohol that migrates from the denture adhesive into your saliva. These bad tastes are indescribable and cannot be avoided as long as the denture adhesive is placed in the mouth not only when eating or drinking but also when not eating or drinking.

Among these problems, a denture stabilizer made of dimethylpolysiloxane has been proposed in order to solve the problem of bad taste during use and peelability from dentures after use.
No. 8234 and Japanese Patent Application No. 2-136683).

On the other hand, when the denture stabilizer made of 7-methylbory-70xane is applied to the denture, the denture stabilizer may stick to the hands and fingers, causing discomfort.

Therefore, there is a need for a denture stabilizer made of dimethylpolysiloxane that has improved adhesion to hands and fingers during application, but it is difficult to prevent such adhesion.

Means for Solving the Problems The denture adhesive of the present invention further improves the problems of the conventional denture adhesives described above, and has a viscosity of 1 million to 15 million centiboise (cps) at 25°C. The present invention provides a denture stabilizer characterized by blending polysiloxane and spherical powder.

The dimethylpolysiloxane used has the general formula: [wherein R1
and R3 is a methyl group or a hydroxyl group, and n is an average polymerization number of a methylsilane group, which is usually 40 or more.
15 million cps, preferably 1 million to 5 million cps
It is from ps. Viscosity at 25℃ or 500,000 C1)
If it is less than S, denture adhesive will stick to your fingers, while if it is 15
If it exceeds 1,000,000 cps, it becomes difficult to spread the coating onto dentures.

Also, the viscosity at 25°C is 500,000 to 15 million cp.
50~ than using one type of dimethylpolysiloxane of s.
1000 cps low viscosity dimethylpolysiloxane and 80
High viscosity methylpoly/CI of 00,000 to 15,000,000 cps
By using dimethylpolysiloxane with a viscosity of 500,000 to 15,000,000 cps in combination with xane, it is possible to further improve the spreadability of the coating onto dentures and the adhesion to fingers.

Such dimethylpolysiloxanes are known and commercially available; for example, those sold by Dow Corning Silicones Co. under the trade name "58200 Oil" can be used. Further, in the present invention, in addition to using dimethylpolysiloxane having a predetermined viscosity alone, two or more types of dimethylpolysiloxane may be used in combination to obtain a predetermined viscosity.

The amount of dimethylpolysiloxane blended is preferably 60 to 95% by weight based on the total amount of the denture stabilizer; if it is less than 60% by weight or exceeds 95% by weight, the adhesion to hands or fingers will not be improved or it will be difficult to apply.

Spherical powders include polyester, polyethylene, polystyrene, methyl methacrylate resin, 12 nylon, 6
Various plastic beads such as nylon, styrene and acrylic acid copolymer, polypropylene, Teflon, vinyl chloride, acrylic, silica, titanium oxide, alumina, etc.
Examples include spheres and particles of aluminum silicate, hydroxyapatite, etc., and these can be used alone or in combination of two or more. Particularly preferred is spherical silica.

The average particle size of the spherical powder is 0.5 to 25 μm, especially 2 to 1o
μm is preferable.

The amount of spherical powder blended is preferably 5 to 30% by weight based on the total amount of the denture stabilizer. If it is less than 5% by weight, the adhesion to hands and fingers will not be improved, and if it exceeds 30% by weight, it will be difficult to spread the coating onto the dentures. becomes difficult.

In the present invention, in addition to these components, water-soluble polymers, organic powders, flavoring agents, bactericidal agents, anti-inflammatory agents, etc. can be blended, and other organoleptics other than dimethylpolysiloxane can also be blended. Polysiloxane may also be blended; for example, methylhydrogen polysiloxane and methylphenylborine loxane are blended because of their safety to living organisms, colorless and transparent appearance suitable as a denture stabilizer, and easy availability. In addition, methylpolycyclosiloxane,
Alkyl-modified silicone, amine-modified silicone, epoxy-modified silicone, carboxyl-modified silicone, chloroalkyl-modified silicone, alkyl higher alcohol ester-modified silicone, alcohol-modified silicone,
Polyether-modified silicone and fluorinated silicone may be used alone or in combination of two or more. In this case, the viscosity of the dimethylpolysiloxane and the mixed fraction of these organopolysiloxanes is 500,000 cps or more at 25°C.

The denture adhesive of the present invention can be produced in the same manner as in the production of ordinary viscous pastes using equipment such as kneaders, scrapers, rollers, mixers, and the like.

For example, dimethylpolysiloxane, spherical powder, and additives such as a water-soluble polymer, a coloring agent, a flavoring agent, a bactericidal agent, an anti-inflammatory agent, etc., which are mixed as necessary, are kneaded until uniform.

Dimethylpolysiloxane is a low viscosity dimethylpolysiloxane (e.g. viscosity 100 cps at 25°C) and a high viscosity dimethylpolysiloxane (e.g. viscosity 1 cps at 25°C).
0,000,000,000 cps), it is preferable to add and mix low-viscosity dimethylpolysiloxane, and further add and knead high-viscosity dimethylpolysiloxane.

The present invention will be explained in more detail with reference to Examples below, but the present invention is not limited thereto. All "%" are "% by weight".

Examples 1 to 11, Comparative Examples 1 to 4 According to the formulation shown in Table 1, each component was uniformly kneaded in a Z-type kneader to produce a denture stabilizer, and its performance was evaluated.

The results are shown in Table 1.

Examples 12 to 24 According to the formulations shown below, each component was uniformly kneaded using a Z-type kneader to produce denture stabilizers, and their performance was evaluated. The results are shown in Table 2.

Dimethylpolysiloxane See Table 2 Spherical silica
15.0 (wt%) Calhoki dimethyl cellulose 9.9 Sodium core oil 0.18 Total
100 The viscosity measurements and evaluations in Tables 1 and 2 were carried out by the following methods.

(1) Viscosity of dimethylpolynoloxane Attach a Brookfield HBT viscometer to a Helibus stand (Hel 1path stand).
Viscosity was measured using a TF spindle at a rotational speed of 5 rpm. Measurements were performed in a constant temperature room at 25°C. This system can measure up to 16,000,000 centivoise, but since the measurement accuracy is poor below 1% of the full scale viscosity (160,000 centivoise), we used a No. Measurement was performed at a rotation speed of 6 rpm.

(2) Spreading an appropriate amount of denture stabilizer was applied to a flat plate made of methacrylic resin, spread with hands and fingers, and the spreadability of the spread denture stabilizer was sensory evaluated using the standard of Tsuki.

◎Good ○: Fairly good △, Fairly poor The degree of inhibition was sensory-evaluated according to the criteria of Aggi.

◎, Good ○: Slightly good △: Slightly poor X: Poor (4
) Comprehensive Evaluation Based on the evaluation results of (2) and (3), it was comprehensively evaluated in four stages according to the following criteria.

A ◎, 1 each or 2 ◎ B: 1 each ○, △ or 2 ○ C 2 △ D 1 or more × As shown in Tables 1 and 2, The denture adhesive of the present invention has desirable properties.

Effects of the Invention According to the present invention, a denture adhesive can be obtained that does not cause problems such as discomfort, bad taste, and stickiness in the mouth, and has improved spreadability during application and adhesion to hands and fingers.

Claims (1)

[Claims] (1) A denture stabilizer comprising dimethylpolysiloxane having a viscosity of 500,000 to 15,000,000 centipoise at 25°C and spherical powder.