The method of treatment of dental prostheses

 

(57) Abstract:

The invention relates to medicine, namely to prosthetic dentistry. The method of treatment of dental prostheses include mechanical cleaning and polishing in the electrolyte, the electrolyte used is a solution containing sulfuric acid, a glycol and an organic additive, taken in certain proportions, time-keeping in the electrolyte is 5 minutes at a current density of 2-5 A/DM2the temperature of 30-45oWith, and as organic additives used hydroxycarbonate acid aliphatic series, for example citric acid. The method provides high quality polishing for a short period of time. 1 C.p. f-crystals, 1 table.

The invention relates to medicine, namely to the field of medical equipment production, production of instruments and devices for prosthetic dentistry.

Currently widely used methods of treatment of dental prostheses in electrolytes containing water, resulting in reduced viscosity and the resistance of the electrolyte.

There is a method of treatment of dental prostheses, including sequential immersion of the prosthesis in electroyogi composition use solution, containing sulfuric acid and distilled water taken in the following ratio, ml:

Sulfuric acid - 500

Distilled water - 480

Duration of 6-10 minutes

As the electrolyte of the second composition use solution containing sulfuric acid, phosphoric acid, ethyl alcohol, ethylene glycol and water taken in the following ratio, ml:

Sulfuric acid - 120

Phosphoric acid - 120

Ethyl alcohol - 120

The glycol - 540

Water - 120

Duration of 5-15 minutes

As the electrolyte of the third composition use solution containing sulfuric acid, glycerin, ethyl alcohol, distilled water, taken in the following ratio, ml:

Sulfuric acid - 98

Glycerin - 47

Ethanol - 12

Water distilled - 8-10

Duration of 5-15 minutes

("Technology of cleaning and electropolishing metal frame clasp dentures" the USSR Ministry of Health, Directorate of health care, 1984).

A big disadvantage of the listed formulations is the rapid enrichment of the electrolyte in the electropolishing process of the alloys Eugeniu process efficiency and reduction in the rate of polishing.

Violation processing mode leads either to the necessity of changing the polishing conditions (increasing current density, the voltage across the bath and the duration of the process), or for a complete replacement of the electrolyte.

The known method is characterized by long duration, because the total duration of processing of the prosthesis is more than two hours, and a quick "zarabatyvaete" electrolytes, resulting in worsening of their operational properties and reduces the quality of polishing.

The closest to the technical nature of the claimed method is a method of treatment of dental prostheses, including their mechanical cleaning, sequential immersion in the electrolyte of the three formulations, keeping them under specified conditions and rinse after processing each of the compositions.

The electrolyte 1 composition use solution containing phosphoric acid, glycerin, sulfuric acid and water taken in the following ratio,%:

H3PO4- 30

H2SO4- 30

Glycerin - 30

H2O - 10

Mode 1: current 4-6 And temperature 20-25oC, the duration of 4-5 minutes

The electrolyte 2 composition use solution, with the 15

The glycol - 80

H2O - 5

Mode 2: current 4-6 And temperature 20-25oC, the duration of 4-5 minutes

The electrolyte 3 composition use solution containing sulfuric acid, glycerin, distilled water, ethyl alcohol, butyl alcohol, taken in the following ratio,%:

H2SO4- 58

Glycerin - 14

Distilled water - 10

Ethyl alcohol - 7

Butyl alcohol - 7

Mode 3: current 4-6 And temperature 20-25oC, the duration of 4-5 minutes

(A. C. USSR N 1456136, MKI A 61 C 13/02, from 7.02.89 year).

The duration of treatment of dental prostheses by a known method was reduced to 20 minutes

However, this method has some significant drawbacks.

The known process is carried out in three electrolytes, so it is quite long and difficult to preserve the original geometrical parameters of the prosthesis. In addition, electrolytes due to their content of water are characterized by fast zarabatyvaete", low resistance during polishing, as a consequence, the low quality of the polishing.

The problem underlying the claimed process is the processing of dentures ve quality polishing for a short period of time.

The problem is solved as follows.

In the method of treatment of dental prostheses, including their mechanical cleaning and polishing in the electrolyte according to the claimed technical solution in the electrolyte used is a solution containing sulfuric acid, a glycol and an organic additive, taken in the following ratio, wt.%:

Sulfuric acid - 10-20

The glycol - 79,95 - 89,50

Organic additive - 0,05-0,5

At the same time keeping the denture in the electrolyte is 5 min at operating temperature 30-45oC, current density 2-5 A/DM2.

As organic additives used citric acid. The effect of citric acid in the electrolyte may be due to the binding of metal cations in high-molecular compounds, it is difficult dissociable in ethylene glycol. Whereas citric acid - hydroxycarbonate acid with a high degree of dissociation (for organic acids strong), so it can be a cathode depolarizer process, i.e., can reduce unproductive losses of electricity (for example, the voltage drop across the near-cathode layer). Thus, the anode efficiency of the polishing process of the age of the organic additive) within these limits it is necessary and sufficient to obtain the anhydrous electrolyte with high resistance and low "zarabatyvaete", the use of which is for the treatment of dental prostheses for the given parameters allows to form the prosthesis thin uniform oxide film of high quality, and the duration of the process is reduced 4 times.

The use of electrolyte components in amounts less than the specified limits is not possible to achieve the effect of polishing.

The use of components in amounts over these limits leads to deterioration of the working properties of the electrolyte, which ultimately causes high metal removal at low luster of a polished surface.

The presence of the distinctive features of the prototype of essential features allows you to recognize the inventive method with a new one.

The prior art has identified solutions that would have the signs consistent with the distinctive features of the proposed method, therefore, the latter meets the condition of inventive step.

The possibility of using the claimed process in the industry allows us to conclude that it conforms to the criterion "industrial applicability".

Processing of dentures was performed using the following electrolytes:

1. Virolit (Germany);

2. Electrolit Super (Germany);

Treatment was subjected to the dentures from a cobalt-chromium alloy imported and domestically produced, approximately the following composition in weight %:

Co 43,8 - 67,0; Cr 26,0 - 30,8; Mo 0,5 - 5,1; Mn 0,5 -1,0; Fe 0,4 - 0,5; Si Of 0.1 - 0.4; C 0,1 -0,4.

Electrolytes 1 and 2 have a wide range of potentials in which at low current density obtained high quality polishing.

Electrolytes 3 and 4 are also allowed in the field potentials 1.8 to 3.2 To be polished alloy at a current density of 2 -5 A/DM2.

In potentiostatic mode was performed experiments on the accumulation of ions of cobalt and chromium during anodic dissolution of the alloy in the electrolyte 1 to 4.

The results of the experiments are shown in the table.

The table shows that when applying the same amount of electricity accumulation of ions of cobalt and chromium is slower only in the electrolyte N 4 with the same quality of polishing.

1. The method of treatment of dental prostheses, including their mechanical cleaning and polishing in the electrolyte, wherein the electrolyte used is a solution containing sulfuric acid, a glycol and an organic additive, taken in the following ratio, wt.%:

Sulfur kisia in the electrolyte is 5 minutes at a current density of 2 - 5 A/DM2working temperature 30 - 45oC.

2. The method according to p. 1, characterized in that the organic additives used hydroxycarbonate acid aliphatic series, for example, lemon (HOOCCH2)2C(OH)COOH.

 

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