RU173621U9 - REMOVABLE PLATE DENTAL WITH SILICONE INSERT - 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 basis with artificial teeth and a lining layer under the basis, formed from a composition based on silicone rubber modified with the treatment drug Methyluracil. To ensure uniform distribution of the modifying additive in the elastic lining before mixing the ingredients included in the silicone lining, the filler is saturated with Miramistin in a ratio of 3: 1 m.h. A removable laminar denture with the proposed lining layer 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. 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, optimizes the manufacture of removable dentures for patients with adverse clinical conditions of the prosthetic bed.

Under unfavorable anatomical and topographic conditions of the prosthetic bed (atrophy of the alveolar ridge, the presence of acute oblique protrusions and exostases, a thinned, malleable mucous membrane, and increased pain sensitivity), using prostheses with plastic bases becomes difficult or completely impossible. In these cases, the use of removable dentures with an elastic lining in contact with the tissues of the prosthetic bed is indicated.

Depending on the nature of the material, elastic lining materials for prosthetic bases 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) .

The known composition of the elastic lining "Composition for the manufacture of an elastic layer basis of a removable laminar denture" (RF patent No. 2288695 C1). This composition contains a copolymer of chlorovinyl butyl acrylate, dioctyl phthalate and methyl methacrylate. However, the presence of a plasticizer (dioctyl phthalate) caused the disadvantages inherent in all plastics with external plasticization - migration of the plasticizer and, as a consequence, aging. The disadvantage of this composition: during operation, the soft base gradually loses its elastic properties, as a result of which its rigidity increases. In addition, a small amount of plasticizer, which is released during continuous operation of the elastic lining in the process of its deformation, affects the mucous membrane of the oral cavity, digestive tract, causing in some cases allergic reactions.

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 dentistry. They are characterized by stable performance and high adaptability in 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 (Shteingart MZ, Trezubov VN, Makarov KN, “Dental prosthetics”, Manual on dental materials science, Moscow, 1996 city, p. 53).

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. The removable denture contains an acrylic base and an elastic base liner formed from a composition based on siloxane rubber, the composition for forming a backing layer for the base includes polydimethylmethylvinylsiloxane rubber, filler, silicon hydride, platinum catalyst, 3 - [(2-hydroxypropyl methacrylate) triethoxysilane.

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 for the development of silicone compositions containing drugs.

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, to create a removable denture with a silicone lining layer that provides a therapeutic and prophylactic effect.

A removable laminar denture with an elastic silicone lining consists of a base (1) with artificial teeth (2) and an elastic silicone lining (3) containing methyluracil.

"Methyluracil" - Methyluracilum (2, 4-dioxo-6-methyl-1, 2, 3, 4-tetrahydro-pyrimidine - odorless white crystalline powder. Registration number 000317 / 01-2001), which has an immunostimulating, anti-inflammatory effect, accelerating processes of cell regeneration, wound healing. It is known to use methyluracil, which by chemical structure refers to pyrimidine derivatives, has anabolic and anti-catabolic activity. Preparations of this group accelerate the processes of cellular regeneration, wound healing, stimulate cellular humoral defense factors; have an anti-inflammatory effect; normalize nucleic acid exchange in the mucous membrane.

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, we proposed that, before mixing the ingredients included in the silicone lining, saturate the filler (for example, Aerosil or diatomite) with Methyluracil. For this, Methyluracil powder is added to the required amount of filler in a ratio of 3: 1 and thoroughly mixed in a laboratory powder mixer for 10 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 wt. hours; modified aerosil (filler) containing methyluracil - 20.0 wt. hours; organohydrosiloxane HO [Si (H) + єt0] 4-H - 4 wt. hours. 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 wt. including modified aerosil (filler) containing the drug - Methyluracil 20.0 wt. hours; 3 - [(2-hydroxypropylmethacrylate) aminopropyl] -triethoxysilane - 4 wt. hours; - platinum catalyst - (platinum 1,3 divinyltetramethyldisiloxane) - 5.10-2 wt. h. All ingredients are mixed 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. Polydimethylmethylvinylsiloxane rubber with a viscosity of 200,000 cP in an amount of 100.0 wt. hours; modified aerosil (filler) containing the drug Methyluracil - 22.0 wt. hours; organohydrosiloxane HO [Si (H) + єt0] 4-H - 3 wt. hours. 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 wt. including modified aerosil (filler) containing the drug Methyluracil - 22.0 wt. hours; 3 - [(2-hydroxypropylmethacrylate) aminopropyl] -triethoxysilane - 3 wt. hours; - platinum catalyst - (platinum 1,3 divinyltetramethyldisiloxane) - 5.10-3 wt. h. All ingredients are mixed 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 min 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 macrohistochemical 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. To measure the area of inflammation zones, a specialized GIMP 2.0 graphics package was used. Patients of the main group were made of prostheses with a silicone lining above the specified composition, containing an aerosil filler modified with the medicinal product Methyluracil in an amount of 20 m.h. to the total volume of the silicone lining with a ratio of m.h. : Aerosil, the drug Methyluracil 3: 1. In the control group of the study, an elastic silicone lining without the methyluracil therapeutic agent was used to relocate prostheses.

A macrohistochemical study revealed differences in the number and frequency of localized areas of acute and chronic inflammation when using prostheses with two-layer bases. Determining the average value of the total areas of inflammation in the group per patient, the arithmetic mean of the area of inflammatory processes was obtained. The total area of inflammation zones on the day of prosthesis fixation in patients of the first group was 875 mm², in patients of the second group 866 mm². After 7 days, this indicator in patients of the first group was 126 mm², in patients of the second group - 438 mm². After 21 days - 47 mm², 361 mm², respectively.

Based on the analysis of the research results, it can be concluded that under the combined removable laminar dentures with an elastic lining made of silicone plastic “Mollosil” modified by Methyluracil, the dynamics showed a more rapid reduction in the number of total areas of mucosal inflammation zones than in patients using removable dentures with elastic lining made of silicone plastic "Mollosil" according to traditional technology.

The proposed removable denture with a modified silicone lining Methyluracil was used in the prosthetics of 19 patients. We observed patients after prosthetics for 7, 14 days and 3 months later. All patients showed a positive trend. The use of the proposed removable denture allowed 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 made of Mollosil silicone plastic modified by Methyluracil provides a therapeutic and 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 the figures.

FIG. 1. Removable lining denture with silicone lining

1 - basis;

2 - artificial teeth;

3 - elastic silicone lining containing methyluracil.

Claims (1)

A removable laminar denture 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 under the base includes a silicone polymer modified with Methyluracil previously introduced into the filler.

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