Two-component paste alginate impression material and preparation method thereof

Abstract

The invention discloses a two-component paste alginate impression material, which is characterized by being prepared from a component I and a component II, wherein the component I is mainly prepared from 59-86% of water, 1-10% of sodium alginate, 10-20% of kaolin, 2-5% of glycerin, 0.1-4% of sodium citrate, 0.1-1% of preservative, 0.1-0.5% of titanium dioxide and 0.01-0.5% of essence; the component II is mainly prepared from 43-89% of water, 5-30% of diatomaceous earth, 0.6-9% of calcium sulfate, 1-6% of cellulose, 2-5% of silica, 2-5% of glycerin, 0.05-0.5% of pigment, 0.01-0.5% of essence and 0.1-2% of preservative. The two-component paste alginate impression material is simpler and more sanitary to use and operate; the two components are paste, thus being dust-free and not requiring force when being mixed together for used. The product is subjected to pre-gelatinizing, homogenizing and vacuum defoaming, so that residual bubbles do not exist; furthermore, the viscosity and thicknessof the product are adjusted to a best condition when the product leaves a factory, so that a clearest impression can be printed.

Description

technical field [0001] The invention relates to an impression material, especially a two-component paste alginate impression material, and also relates to a preparation method of the two-component paste alginate impression material. Background technique [0002] Dental impression materials are materials used to make impressions of teeth and soft and hard tissues of the oral cavity. An impression is a negative model of an object that records or reproduces the morphology of teeth and oral tissues and their relationship. According to whether the impression is elastic or not, it is divided into two types: elastic impression material and non-elastic impression material; according to whether the impression material can be used repeatedly, the impression material is divided into reversible impression material and irreversible impression Material: According to the form of solidification of impression materials, it can be divided into chemical coagulation, thermal coagulation and no...

AI Technical Summary

Problems solved by technology

[0004] Alginate impression materials mainly have the following problems: (1) From the perspective of reaction mechanism: traditional powdery alginate impression materials are made of alginate, gypsum powder, diatomaceous earth, magnesium oxide, etc. Can be made by simple mixing, the processing process is extremely simple

The processed product does not undergo a chemical reaction before use, and the alginate does not start to dissolve until the water is added to it. Alginate is a polymer material that is relatively difficult to dissolve in water. When the alginate that has been dissolved in water When encountering calcium ions, the chemical reaction occurs just now. Due to the short time (it is stipulated that the reconciliation must be completed within 1 minute), the alginate and calcium ions in the powdered alginate impression material cannot react completely, which not only wastes precious Alginate, but also affect the strength of the printed film material

(2) From the perspective of use experience: a. The traditional powdered alginate impression material needs to be added with water when it is used. Adding suitable water is a technical task, and inexperienced doctors often cannot add it

If too much water is added, the impression material will be very thin, and when placed in the patient's mouth, it may flow from the tray into the patient's mouth, which may cause the patient to swallow or vomit; If the material paste is too thick, its fluidity will be poor, and the printed mold will naturally be unclear

Therefore, it is difficult for a dentist without certain experience to pull out a good impression

b. When the traditional powder impression material is mixed with water, it will definitely produce dust, which is choking, and it needs to be reconciled repeatedly to make a good impression material, which is very laborious

c. Traditional powdery alginate impression materials, because the powder itself contains air, so a small amount of air bubbles will inevitably be generated during the mixing process, resulting in the failure of impression taking is not uncommon.

(3) From the perspective of hygiene: most brands of traditional powdered alginate impression materials are packaged in cans or plastic bags of about 1kg. Once the package is opened, it cannot be closed again. Such use There are bound to be risks of various contaminations (such as: bacteria, mold, dust, moisture, etc.)

Even so, sometimes it will seriously affect the accuracy of the modulo

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