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 minutesAs 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 minutesAs 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,%:
Glycerin - 30
H2O - 10
Mode 1: current 4-6 And temperature 20-25oC, the duration of 4-5 minutesThe 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 minutesThe electrolyte 3 composition use solution containing sulfuric acid, glycerin, distilled water, ethyl alcohol, butyl alcohol, taken in the following ratio,%:
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 minutesHowever, 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);
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.
FIELD: medical engineering.
SUBSTANCE: method involves taking anatomical imprint from jaw under prosthetic repair, casting supergypsum model for carrying out parallelometric studies, model duplication, modeling future clasp carcass skeleton from wax, enclosing the wax model into cell filled with gypsum, evaporating wax and filling the arisen cavity with polymer. The clasp carcass model is reproduced as metal one from polymer model for all models taken in production. Polymer for manufacturing clasp carcass model is reactive composition hardening at room temperature and composed of two ingredients taken in 2:1 proportion by weight. The first ingredient portion is based on polymethyl methacrylate, and the second one is polymethyl methacrylate with dimethylaniline added in the amount of 1-2% by mass.
EFFECT: significantly accelerated carcass manufacturing process; high accuracy in reproducing sizes; improved connection of locks and telescopic crowns to polymer carcass; low production costs.
FIELD: medical engineering.
SUBSTANCE: method involves making imprint, producing model and primary crown. Next, secondary prosthesis is manufactured on the primary crown and the prosthesis is treated with electric current of high density using instrument as electrode. The secondary prosthesis is manufactured with tolerance for layer thickness to be removed in applying electrochemical treatment method. Then, the electrochemical treatment method is carried out and the secondary prosthesis is fitted on the primary crown.
EFFECT: high treatment accuracy; uniform load distribution over tooth; simplified process.
SUBSTANCE: invention relates to medical equipment and is intended for cleaning of metal clasp frameworks, crowns and dental bridges from moulding mass after moulding. Method includes processing for 2-5 minutes in alkali-salt melt, which consists of sodium hydroxide and potassium chloride with the following component ratio, wt %: sodium hydroxide - 85-90; potassium chloride - 10-15.
EFFECT: reduction of clasp framework, crown and dental bridge etching; process efficiency due to application of cheaper and more available sodium hydroxide.
SUBSTANCE: method for electroplating of removable dentures involves gold pre-electroplating at cathode current density 0.3-0.5 A/dm2 for 8-10 min from aqueous electrolyte with pH 1.0-1.5 containing potassium dicyanoaurate and citric acid, and further palladium finish electroplating at cathode current density 0.5-0.7 A/dm2 for 1-1.5 h to a palladium thickness layer of 8-10 mcm from aqueous electrolyte containing palladium chloride, ammonium chloride, sodium nitrate, ammonium sulphamate and ammonium hydroxide in certain proportions.
EFFECT: method provides preparing pore-free, stress-free, glossy and plastic coating enabling equal potentials between the dentures made of base alloys or palladium-containing alloys if used simultaneously, eliminating negative effects, unpleasant taste and wear of the dentures related to simultaneous use of the dentures with different compositions.
4 cl, 1 tbl, 1 ex
SUBSTANCE: tooth root canal filling composition effective in cases of periodontitis and parodontosis contains zinc oxide, resorcinol, formalin, and additionally thymol, all taken is specified proportions. Composition allows treatment of periodontitis and parodontosis with elevated tooth mobility and without change in solid dental tissue color.
EFFECT: increased treatment efficiency and simultaneously antiseptic and bactericidal properties.
FIELD: medical engineering.
SUBSTANCE: test sample material has sintered polycrystalline hydroxyapatite having potassium to phosphorus content ratio within the limits of 1.50 to 1.67, apparent density being from 3 to 3.1 g/cm3 and the sample for testing tooth cream is manufactured as spatial body having test surface from sample material showing the above referenced properties. Test surface purity is of tenth precision class. The sample is manufactured as pill.
EFFECT: high reproducibility of test results.