RU2352288C1 - Method of manufacturing ground for metal tooth prostheses - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: invention concerns medicine, namely to orthopedic stomatology, and concerns the way of manufacturing of a ground for metal tooth prostheses on a basis of adhesive polyvinylbutyral resin and Sinma-M plastic.

EFFECT: invention provides the enlarged adhesion between ground and metal tooth prosthesis, creation of cohesive interaction between the ground and coating Sinma-M plastic at the expense of affinity of materials, durability of bracing of facing and working capacity of all design, depression of the cost price of tooth prosthesis.

1 cl, 4 ex

Description

The invention relates to medicine, namely to prosthetic dentistry, and is associated with the need for a stable connection with a high adhesion due to the adhesive interaction between the polymer material of the cladding and the metal frame of the denture.

The closest in technical essence and the achieved effect are the compositions for priming the metal frames of dentures, containing a copolymer of methyl methacrylate and methyl acrylate, an adduct of epoxy resin and methacrylic acid, titanium dioxide and benzoyl peroxide [Specifications, varnish coating EDA, TU 64-2-221- 78], the above components and triethylene glycol dimethacrylate, methacrylate oligocarbonate, diphenylolpropane dimethacrylate [Aut. St. SU 1113122 A, 09.15.84, Bull. No. 34].

The lack of compositions for priming the surfaces of metal structures of fixed dentures before facing them with plastic is their low adhesive strength, which does not provide a strong fixation of the facing layer to the metal denture and leads to peeling of the plastic during operation of the denture. In addition, all applied soils have a multicomponent composition, which complicates the technology of soil preparation and increases the cost of the composition.

The technical task of the invention is to develop a method of manufacturing a primer for metal dentures, which allows for high adhesion between the primer and a metal denture, create a cohesive interaction between the primer and Sinma-M plastic due to the affinity of materials, increase the fixation strength and workability of the entire structure and reduce the cost of the composition .

To solve this problem, a method for the manufacture of soil for metal dentures is proposed, characterized in that polyvinyl butyral is dissolved in the amount of 3-5 wt.% In Sinma-M plastic liquid, Sinma-M plastic powder and titanium dioxide powder are introduced into the resulting solution at the next choice the ratio of components, wt.%:

Polyvinyl butyral 3.0-5.0 Sinma-M Plastic Liquid 52.0 Sinma-M Plastic Powder 23.0-25.0 Titanium dioxide 20,0

mix the mixture to a creamy state, followed by application to a metal denture and heat treatment at a temperature of 125 ° C, a pressure of 0.4-0.5 MPa for 10 minutes

The technical result consists in increasing adhesion, which contributes to an increase in the fixation strength of the Sinma-M plastic cladding to the metal denture by changing the composition and method of preparing the composition for priming the metal surfaces of prostheses.

A method of manufacturing a soil for metal dentures is as follows. In the liquid of Sinma-M plastic, the calculated amount of polyvinyl butyral is introduced in an amount of 3-5 wt.%. After its dissolution, the powder of Sinma-M plastic and titanium dioxide is introduced into the resulting solution and mixed until a creamy state. The resulting mixture has a high hiding power.

The manufacture of samples for measuring the strength of fixation was carried out according to the following method. Samples of KHS steel were made in the form of cast plates measuring 10 × 20 × 2 mm. After mechanical cleaning, the samples are subjected to subsequent sandblasting and degreasing with methyl methacrylate or AKP-7, then dried. Apply a thin layer of soil to a metal surface with a brush or spatula. The samples are glued with an overlap under pressure up to 0.3 MPa, the squeezed excess soil is removed. Heat treatment is carried out in a pneumopolymer for 10 minutes at a temperature of 125 ° C and a pressure of 0.4-0.5 MPa. After cooling to 60 ° C, the samples are removed and shear stress is determined on a tensile testing machine. The tests are carried out at a movement speed of the loading clamp of 10 mm / min. A method of manufacturing a soil for metal dentures is illustrated by the following examples.

EXAMPLE No. 1.

Polyvinyl butyral in the amount of 3 g (3% by weight of the composition) is dissolved in Sinma-M plastic liquid. Then, Sinma-M plastic powder in an amount of 25 g (25 wt.%) And titanium dioxide in an amount of 20 g (20 wt.%) Are added to the resulting solution. The resulting mass is mixed in a mortar until a homogeneous creamy mass is obtained and applied to the surface of a metal denture. The soil is polymerized for 10 min at a temperature of 125 ° C and a pressure of 0.4-0.5 MPa. The product is recovered after cooling to 60 ° C. The components are taken in the following ratio (wt.%):

Polyvinyl butyral 3.0 Sinma-M Plastic Liquid 52.0 Sinma-M Plastic Powder 25.0 Titanium dioxide 20,0

Determine the strength of fixation of the plastic to the metal denture. It is 69 kg / cm ² .

EXAMPLE No. 2.

The composition is prepared analogously to example 1, but polyvinyl butyral is added to it in an amount of 4 g (4% by weight of the composition) in the following ratio of components, wt.%:

Polyvinyl butyral 4.0 Sinma-M Plastic Liquid 52.0 Sinma-M Plastic Powder 24.0 Titanium dioxide 20,0

Determine the strength of fixation of the plastic to the metal denture. It is 108 kg / cm ² .

EXAMPLE No. 3.

The composition is prepared analogously to example 1, increasing the content of polyvinyl butyral to 5 g (5 wt.%) In the following ratio of components, wt.%:

Polyvinyl butyral 5,0 Sinma-M Plastic Liquid 52.0 Sinma-M Plastic Powder 23.0 Titanium dioxide 20,0

Determine the strength of fixation of the plastic to the metal denture. It is 86 kg / cm ² .

EXAMPLE No. 4 (prototype).

A copolymer of methyl methacrylate and methyl acrylate is mixed in a mortar, to which benzoyl peroxide and titanium dioxide are first introduced to obtain a homogeneous powder. Separately, oligocarbonate methacrylate (OKM-2), triethylene glycol dimethacrylate (TGM-3), diphenylolpropane dimethacrylate (DMD), the adduct of epoxy resin and methacrylic acid are mixed together to obtain a homogeneous liquid. To prepare the composition for priming, take 2 parts of the powder and 1 part of the liquid, mix until a homogeneous mixture is obtained, cover metal dentures and dry the soil at 110 ° C for 5 minutes.

The components are taken in the following ratio of components, wt.%:

The copolymer of methyl methacrylate and methacrylate 12.0 Triethylene glycol dimethacrylate (DMD) 29.0 Oligocarbonate methacrylate (OKM-2) 11.5 Epoxy Resin and Methacrylic Acid Adduct (TGM-3) 25.0 Diphenylolpropane Dimethacrylate 2.5 Benzoyl peroxide 0.4 Titanium dioxide 20.6

Determine the strength of fixation of the plastic to the metal denture. It is 56 kg / cm ² .

As can be seen from the examples, the strength of fixation of the cladding when using the proposed composition is almost two times higher than the strength of the fixation of the cladding when using the prototype. The fixing strength of the plastic lining is determined by the compatibility of the polymerized components and the adhesive-cohesive interaction, which increases due to the polyvinyl butyral component and is 108 kg / cm ² in the manufacture of the composition according to example No. 2.

If the amount of polyvinyl butyral is less than 2.0 wt.%, The adhesive interaction between the metal and the soil is not enough, with more than 5.0 wt.% Polyvinyl butyral, plastic deformation increases while maintaining the adhesive strength of fixation. The proposed method for the manufacture of soil for metal dentures allows to increase the strength of fixing the cladding made of Sinma-M plastic to the metal denture by introducing one modifying additive - polyvinyl butyral.

The proposed method for the manufacture of soil for metal dentures based on the adhesive of polyvinyl butyral and Sinma-M plastic allows:

- increase the adhesion between the soil and the metal denture;

- create a cohesive interaction between the soil and the Sinma-M facing plastic due to the affinity of the materials;

- to ensure the strength of the fixation of the lining and the performance of the entire structure;

- reduce the cost of the denture.

Claims (1)

A method of manufacturing a primer for metal dentures, characterized in that polyvinyl butyral is dissolved in an amount of 3-5 wt.% In a plastic liquid of Sinma-M, a powder of Sinma-M plastic and a powder of titanium dioxide are introduced into the resulting solution with the next ratio of components, wt. %:
Polyvinyl butyral 3.0-5.0 Sinma-M Plastic Liquid 52.0 Sinma-M Plastic Powder 23.0-25.0 Titanium dioxide 20.0
mix the mixture to a creamy state, followed by application to a metal denture and heat treatment at a temperature of 125 ° C, a pressure of 0.4-0.5 MPa for 10 minutes