RU147544U1 - REMOVABLE DENTISTRY WITH TWO-LAYERED BASIS - Google Patents

Abstract

A removable denture with a two-layer acrylic base, including an elastic silicone lining and artificial teeth, characterized in that the material used to form the elastic silicone lining is silicone material modified with highly dispersed colloidal silver particles introduced into the filler before mixing with siloxane rubber.

Description

The utility model relates to orthopedic dentistry and can be used to form an elastic lining layer in the manufacture of removable dentures with adverse clinical conditions of the prosthetic bed.

Under unfavorable anatomical and topographic conditions of the prosthetic bed - the presence of areas within the prosthetic bed with an acute form of the alveolar ridge, sharp edges of the holes, significant tuberosity of the alveolar ridge, thinned, malleable mucous membrane, as well as increased pain sensitivity, the use of prostheses with rigid bases becomes difficult. In these cases, the use of two-layer bases with an elastic lining facing directly to the tissues of the prosthetic bed is indicated.

The known composition of the elastic layer base of a removable laminar denture (RF patent No. 2288695, A61K 6/08, 2006), containing a copolymer of chlorovinyl butyl acrylate and a plasticizer-dioctyl phthalate, characterized in that it additionally contains methyl methacrylate. PVC materials resist abrasion better than acrylic. However, the presence of a plasticizer causes its migration to the oral cavity and aging of the polymer.

The closest analogue of the utility model is a removable denture containing an acrylic base and a backing layer under the base formed of silicone rubber (RU, utility model patent No. 45083, A61, C 13/107, 2005). The technical result from the use of a utility model is to obtain a product with an extended service life. A removable denture contains an acrylic base and a backing layer under the basis, formed from a composition based on siloxane rubber, and the composition for forming the backing layer under the basis includes, in parts of:

Polydimethylmethylvinylsiloxane rubber: 100.0

Filling: 16.2-25.8

Silica Hydride: 1-3

Platinum catalyst: 5 × 10 ^-4 -5 × 10 ^-2

3 - [(2-hydroxypropyl methacrylate) aminopropyl] triethoxysilane: 1-3. The disadvantage of this analogue is that the finished removable prosthesis is devoid of antimicrobial, antifungal effects in the oral cavity and, as a result, contributes to the appearance of microbial prosthetic stomatitis.

The technical result of the utility model is the development of a device, the composition of the materials of which allows to increase the efficiency of jaw prosthetics in the complete absence of teeth in patients with adverse clinical conditions of the prosthetic bed, by creating a lining layer that provides antibacterial action.

The utility model consists of an elastic silicone lining layer (1), modified with fine particles of colloidal silver, a two-layer acrylic base (2) made by mixing monomer and polymer with subsequent polymerization; artificial teeth (3).

The technical result is achieved using a new method of introducing silver into the lining layer (1). Uses colloidal silver, its highly dispersed particles. In this case, silver particles are evenly distributed over the entire basis of the prosthesis. The esthetics of the removable prosthesis is not disturbed. Due to the use of finely dispersed silver particles, the bactericidal effect is multiplied. It is advisable to use such prostheses for diseases of the oral mucosa.

The bactericidal properties of silver and its compounds have been known for centuries. During this time, there were no cases of addiction to it of pathogenic microflora. It was found that silver in nanometric dimensions is more active than chlorine, bleach, sodium hypochlorite and other strong oxidizing agents, 1750 times stronger than carbolic acid and 3.5 times stronger than mercuric chloride, provided that their concentrations are equal. More than 650 species of bacteria, viruses and fungi are sensitive to silver [Kulsky L.A. Silver water. 9th ed., K .: Dumka Science, 1987, 134 pp.].

Known bactericidal medicinal preparations based on non-ionized metallic silver (collargol, poviargol) and silver oxide (protargol) are obtained by a chemical method and stabilized by casein hydrolysates (collargol), gelatin hydrolysates (protargol), polyvinylpyrrolidone (poviargol), and natural polynaccharide. The preparations are stored in a dry powder state and are used in the form of colloidal solutions obtained after dispersion in water. Poviargolum [RF Patent No. 2088234. 1997. BI No. 24].

The composition for forming the lining layer (1) consists of the following components. As a rubber, the composition contains a polyorganosilane of the formula CH2 = CH [Si (R2) O] 4Si (R2) -CH = CH2 with a viscosity of 500-300000 cP at 25 ° C.

Modified aerosil, silica powder, zinc oxide, and diatomite saturated with silver nanoparticles are used as filler.

Pt complexes and compounds (platinum - 1.3 divinyltetramethyldisiloxane), metal carbonyls are used as a platinum catalyst.

As a sizing component, 3 - [(2-hydroxypropyl methacrylate) aminopropyl] -triethoxysilane.

The manufacture of a modified elastic silicone lining layer (1) is as follows.

Prior to mixing the ingredients included in the silicone lining, the filler, for example, modified aerosil or diatomite, is saturated with highly dispersed silver. For this, a colloidal solution of poviargol (reg. No. 911167/7 approved. 03/27/97) containing highly dispersed silver of the required concentration, for example 20 mg / l, is added to the required amount of filler. The volume of the colloidal silver solution is calculated from the required silver concentration in the filler. Next, the filler with povargol is mixed and placed in a desiccator for drying. Drying is carried out at a temperature of 50-60 ° under vacuum until the water evaporates completely. Then, a dry silver-filled filler is introduced into the composition to form a backing layer (1).

Example 1. Composition No. 1. Polydimethylmethylvinylsiloxane rubber with a viscosity of 100,000 cP in an amount of 100.0 mass, hours is loaded into a laboratory mixer; saturated modified aerosil (filler) with fine silver - 25.0 mass.h; organohydrosiloxane of the general formula HO [Si (H) + t0] 4-H - 3 parts by weight The components are mixed for 20 minutes, after which the resulting mixture is unloaded into a container. Then, Composition No. 2 is prepared: polydimethylmethyl vinylsiloxane rubber with a viscosity of 100,000 cP — 100.0 parts by mass, modified aerosil (filler) saturated with highly dispersed silver — 25.0 parts by mass; - platinum catalyst - (platinum 1,3 divinyltetramethyldisiloxane) - 5.10-2 mass parts; size 3 - [(2-hydroxypropylmethacrylate) aminopropyl] -triethoxysilane - 2 parts by weight All ingredients are mixed for 20 minutes, after which the resulting mixture is unloaded from the mixer.

Example 2. Composition No. 1. Polydimethylmethylvinylsiloxane rubber with a viscosity of 150,000 cP in an amount of 100.0 parts by weight is loaded into a laboratory mixer; (filler) diatomite saturated with fine silver 20.0 mass.h; organohydrosiloxane of the general formula HO [Si (H) + t0] 4-H - 2 parts by weight The components are mixed for 20 minutes, after which the resulting mixture is unloaded into a container. Then, Composition No. 2 is prepared: polydimethylmethylvinylsiloxane rubber with a viscosity of 150,000 cP — 100.0 parts by mass, saturated (filler) diatomite with highly dispersed silver — 20.0 parts by mass; - platinum catalyst - (platinum 1,3 divinyltetramethyldisiloxane) - 5.10-2 mass parts; size 3 - [(2-hydroxypropylmethacrylate) aminopropyl] -triethoxysilane - 2 parts by weight All ingredients are mixed for 20 minutes, after which the resulting mixture is unloaded from the mixer. The resulting two Compounds No. 1 and No. 2 are mixed in a ratio of 1: 1 until a homogeneous mass is obtained for 2-3 minutes.

The composition is ready for the formation of an elastic silicone lining layer (1). Curing occurs in the patient's oral cavity.

Bacteriological studies showed that the obtained elastic silicone lining layer modified by our technology (1) has a pronounced prolonged antibacterial effect.

To conduct bacteriological tests, samples of silicone pads in the form of tablets were prepared in size: with a diameter of 14 mm and a height of 2 mm. Extracts from the same sample - tablets were received every two weeks, they were thermostated according to the method of accelerated aging (I-42-2-82. “Temporary instructions for work to determine the shelf life of drugs based on the method of accelerated aging at elevated temperature ”) Followed by plating on plates seeded with staphylococcus test culture using the in vitro cup-suspension method in accordance with the method described in MP No. 2003/17 of 03.19.2004“ Cup Method for Evaluating the Effectiveness of Disinfectants and Antiseptics ”.

Table 1. The test results of samples of material for the manufacture of elastic silicone lining layer (1) The silver content, wt.% Silicone Lining Color Antibacterial effect 0.0001 white No effect 0.001 white The effect of 90 days 0.002 white The effect of 90 days 0.01 white The effect of 90 days 0.05 brown tint The effect of 90 days

As shown in the table. 1, extracts from samples of tablets containing finely dispersed silver exhibit an antibacterial effect that persists for 90 days. The silicone lining has a traditional white color. This quality is due to the very low concentration of silver and its uniform distribution throughout the polymer.

The proposed removable prosthesis with a two-layer basis containing highly dispersed silver was used in the prosthetics of 18 patients. We observed patients after prosthetics for at least six months. The treatment results are good - in all cases, the level of pathogenic microflora of the oral cavity decreased according to microbiological research, the number of patients with microbial prosthetic stomatitis decreases.

The utility model can be used in the clinic of orthopedic dentistry in the manufacture of two-layer prostheses to restore lost teeth, chewing, articulation, speech.

Description to the figures.

Figure 1. A removable denture with a two-layer basis

1 - elastic silicone lining layer modified with highly dispersed particles of colloidal silver;

2 - a two-layer acrylic base obtained by mixing a monomer and a polymer with subsequent polymerization;

3 - artificial teeth.

Claims (1)

A removable denture with a two-layer acrylic base, including an elastic silicone lining and artificial teeth, characterized in that the material used to form the elastic silicone lining is silicone material modified with highly dispersed colloidal silver particles introduced into the filler before mixing with siloxane rubber.

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