RU186731U1 - REMOVABLE DENTURE WITH MODIFIED LINING - Google Patents

Abstract

The utility model relates to orthopedic dentistry, in particular to removable dentures having an elastic lining under the basis of a silicone composition. A removable denture contains an acrylic base with artificial teeth and a silicone lining under the base, formed from a composition based on silicone polymer modified with a medical preparation - Dexpanthenol in an amount of 6.0 mph A removable denture with a modified silicone lining provides a therapeutic, prophylactic and anti-inflammatory effect, optimizes the regeneration and epithelization of the oral mucosa in patients, when applied to orthopedic treatment. This made it possible to reduce the number of visits for prosthesis correction and to shorten the time for adaptation to prostheses.

Description

The utility model relates to orthopedic dentistry and can be used to form an elastic lining in the manufacture of removable dentures.

In modern prosthetic dentistry, when prosthetics of patients with complete absence of teeth are present in the presence of a thin atrophic mucous membrane of the prosthetic bed and its uneven compliance, the presence of bone protrusions, exostoses, undercuts and other unfavorable morphological factors of the prosthetic bed, soft-lined dentures are successfully used. According to some authors, adverse clinical conditions for prosthetics (bone protrusions, a thinned mucous membrane, etc.) are observed in 30-35% of patients. In order to improve the effectiveness of prosthetics in patients with complex anatomical and topographic conditions of the prosthetic bed, the use of removable prostheses with elastic base plastic is recommended.

The elastic lining materials for denture bases, depending on the nature of the material, are divided into 4 types: acrylic, polyvinyl chloride, silicone and based on fluororubber (Zhulev EN, “Materials science in orthopedic dentistry”, Nizhny Novgorod, 1997, p. 45).

Known elastic base material based on polymethylmethacrylate "Elastacryl". This material, like all polymer-monomer compositions, has many advantages: it is firmly bound to a rigid base material, mechanically strong, and satisfactory from the side of aesthetic qualities. Along with this, a number of negative aspects nevertheless limits its application. This is due to the fact that methyl methacrylate, or monomer, during polymerization is partially in a free state and moves to the surface of the base, which leads to toxic effects on oral tissue. This can be especially pronounced in individuals with allergic reactions to acrylates. In addition, it ages relatively quickly and loses elasticity. With this replacement, the entire soft layer is subject to or the prosthesis must be completely redone. There is another drawback of acrylic plastics - during hot polymerization, polymer-monomer compositions shrink by about 6%.

Known elastic lining material "Elent-100", which is a set of powder and liquid. It has good elasticity, is resistant to the effects of oral fluid, and has high adhesion to the base material. Its powder is a copolymer (suspension polymer of vinyl chloride with butacrylate), clouded with titanium dioxide. The liquid is dioctyl phthalate. PVC materials resist abrasion better than acrylic and silicone. The presence of plasticizers in the composition of PVC compositions causes disadvantages. Diffusion of plasticizer (dioctyl phthalate) leads to a decrease in plasticity, relatively rapid aging, and an increase in the toxicity of plastic, which has a local and general effect on the body, causing inflammatory changes in the mucous membrane of the prosthetic bed and various allergic reactions of the body. (Orthopedic dentistry. Applied materials science. Aut. Trezubov VN, Shteyngart MZ, Mishnev LM - St. Petersburg. Special literature 1999. - 121 p.).

The difference between silicone polymers (polysiloxanes) and polyvinyl chloride polymers and their biological inertness made it possible to widely use them in medical practice, including orthopedic dentists. In Russia, silicone base linings have been manufactured since 1963. They are characterized by stable performance and high adaptability to cold vulcanization. When used as linings in combined basic dentures, they are well wetted by saliva, and adhere tightly to the mucous membrane. They do not contain plasticizers, which, as a rule, are washed away and therefore retain plasticity for a number of years (Shteyngart MZ, Trezubov VN, Makarov K, N., “Dental prosthetics” Manual on dental materials science, Moscow, 1996 p. 53).

However, it should be noted that when using silicone polymers as linings, it is not always possible to avoid the occurrence of prosthetic stomatitis, especially if the patient has conditions complicating prosthetics. (Prosthetic stomatitis refers to various pathologies of the oral mucosa of an inflammatory nature due to the presence of dentures in the oral cavity). Therefore, there is a need to develop silicone compositions containing drugs.

The closest analogue of the utility model is a removable denture containing an acrylic base and a backing layer under the base formed from siloxane rubber (RU, utility model patent No. 45083, A61, C13 / 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 an elastic base lining formed from a composition based on siloxane rubber, and the composition for forming a lining layer under the base includes, in mass. hours:

Polydimethylmethylvinylsiloxane rubber: 100.0;

Filler: 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 objective of this utility model is 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 removable denture with a lining layer that provides a therapeutic and prophylactic effect.

The essence of the device lies in the fact that the plastic removable denture contains a base with artificial teeth and a silicone lining modified by a medicinal product containing Dexpanthenol, which optimize the regeneration and epithelization of the oral mucosa.

A removable denture with a modified silicone lining is shown in Fig. 1, The prosthesis consists of a -2 base with artificial teeth -3 and an elastic silicone lining -1, modified with Dexpanthenol.

Dexpanthenol - provitamin B5, a derivative of pantothenic acid (component of coenzyme A), an effective stimulator of tissue regeneration processes. It normalizes cellular metabolism, increases the strength of collagen fibers, and has a weak anti-inflammatory effect. It is especially indicated for poorly healing wounds and ulcers (abrasions, cracks, burns, pressure sores, diaper rash), effective for dry dermatitis, allergic dermatoses, dry rhinitis. Pantothenic acid, as a component of coenzyme A (coenzyme A), is present in all living tissues, and their damage dramatically increases the need for it. Pantothenic acid is involved in the processes of acetylation and oxidation, carbohydrate and fat metabolism, the tricarboxylic acid cycle, in the synthesis of acetylcholine (choline acetylation), glucocorticosteroids, porphyrins.

The composition for forming a modified elastic lining consists of the following components:

As rubber, the composition may contain a polyorganosiloxane of the formula CH2 = CH [Si (R2) O] 4Si (R2) -CH = CH 2 with a viscosity of 500-300000 cP at 25 ° C.

Aerosil, silica powder, zinc oxide, diatomite can be used as a filler. To ensure uniform distribution of the modifying additive in the elastic lining, 3: 1 Dexpanthenol powder is added to the required amount of filler and mixed thoroughly in a laboratory powder mixer for 15 minutes. Then, the modified filler is mixed with siloxane rubber and incorporated into the composition to form a backing layer.

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

Silica hydride: organohydrosiloxane of the formula HO [Si (H) + єt0] 4-H. As an adhesion promoter: 3 - [(2-hydroxypropylmethacrylate) aminopropyl] -triethoxysilane.

The manufacture of a removable denture with a modified elastic silicone lining is as follows.

Example 1. Composition No. 1. Polydimethylmethylvinylsiloxane rubber with a viscosity of 150,000 cP in an amount of 100.0 mass is loaded into a laboratory mixer. hours; modified aerosil (filler) - 24 mass.h .; containing Dexpanthenol - 6.0 mass. h; organohydrosiloxane HO [Si (H) + єt0] 4-H - 4 wt. h. The components are mixed for 20 minutes, after which the resulting mixture is unloaded into a container. Then prepare Composition No. 2: polydimethylmethylvinylsiloxane rubber with a viscosity of 150,000 cP - 100.0 mass. hours, modified aerosil (filler) - 24 parts by weight; containing the drug - Dexpanthenol 6.0 parts. h; 3 - [(2-hydroxypropylmethacrylate) aminopropyl] -triethoxysilane - 4 mass. h; - platinum catalyst - (platinum 1,3 divinyltetramethyldisiloxane) - 5.10-2 mass. h. All ingredients are stirred for 20 minutes, after which the resulting mixture is unloaded from the mixer. The resulting two compositions 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 to form an elastic pad. Curing occurs in the patient’s oral cavity.

Example 2. Composition No. 1. In a laboratory mixer load polydimethylmethylvinylsiloxane rubber with a viscosity of 200,000 cP in an amount of 100.0 mass. h; modified aerosil (filler) - 32 mass. hours, containing the drug Dexpanthenol - 8.0 mass. h; organohydrosiloxane HO [Si (H) + єt0] 4-H - 3 wt. h. The components are mixed for 20 minutes, after which the resulting mixture is unloaded into a container. Then prepare Composition No. 2: polydimethylmethylvinylsiloxane rubber with a viscosity of 200,000 cP - 100.0 mass. hours, modified aerosil (filler) - 32 mass. h, containing the drug Dexpanthenol - 8.0 mass. h; 3 - [(2-hydroxypropylmethacrylate) aminopropyl] -triethoxysilane - 3 mass. o'clock; - platinum catalyst - (platinum 1,3 divinyltetramethyldisiloxane) - 5.10-3 mass. h. All ingredients are stirred for 20 minutes, after which the resulting mixture is unloaded from the mixer. The resulting two compositions 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 to form an elastic pad. . Then, they were uniformly applied to the prepared surface of the prosthesis base (treated with adhesive from the Mollosil kit), which was placed in the oral cavity and molded under chewing pressure for 2-5 minutes. Curing occurs in the patient’s oral cavity.

The obtained individualized prosthesis was subjected to additional heat treatment at 50 ° C for 5 minutes to accelerate the final polymerization of the plastic. Then, using a scalpel, excess plastic was removed that went beyond the prepared zone and a protective varnish from the Mollosil kit was applied in one layer to the zone of transition of soft plastic to hard and allowed to dry.

For the diagnosis of inflammatory processes of the mucous membrane, a macro-histochemical study was carried out using solutions of well-known dyes used in dentistry. Diagnosis was performed before prosthetics and again, appointing patients after 7 and 21 days. Patients of the main group were made of prostheses with a silicone lining above the specified composition, containing an aerosil filler modified with the therapeutic drug Dexpanthenol in an amount of 6.0 m.h. to the total volume of the silicone lining with a ratio of m.h. : Aerosil., drug Dexpanthenol 3: 1. In the control group of the study, an elastic silicone lining without the therapeutic drug Dexpanthenol was used to relocate prostheses.

Based on the analysis of the results of the study, we can conclude that under removable dentures with an elastic silicone lining modified by Dexpanthenol, there was a more rapid reduction in the number of total areas of mucosal inflammation zones than in patients using removable dentures with elastic silicone lining without the dexpanthenol medication.

The proposed removable denture with a modified silicone lining Dexpanthenol was used in prosthetics of 20 patients. We observed patients after prosthetics for 7 days and 3 months later. All patients showed a positive trend. The use of the proposed removable denture made it possible to reduce the inflammatory response of the mucosa of the prosthetic bed, shorten the adaptation time and increase functional efficiency. This is confirmed on the basis of the clinical picture and the survey conducted in the patients we observed. An improvement in individual quality of life was manifested in a decrease in pain sensitivity while wearing the prosthesis and while chewing.

Thus, the use of a removable denture with an elastic lining modified by Dexpanthenol provides a therapeutic and prophylactic effect and has an anti-inflammatory effect, optimizes the regeneration and epithelization of the oral mucosa of patients using removable dentures.

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

Description to figures:

Figure 1. View of the prosthesis

1-modified elastic silicone lining.

2- basis acrylic

3- artificial teeth.

Claims (1)

A removable denture with a modified lining, containing an acrylic base with artificial teeth and an inner layer of elastic silicone lining, characterized in that the composition for forming the silicone lining for the basis includes a silicone polymer modified with the therapeutic drug Dexpanthenol incorporated into the silicone polymer.

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