Alginate [based] impression material is a kind of impression material that can be used for dentistry, generally divided into two parts: matrix material slurry and solid agent slurry.
The solid agent is generally used to inhibit its self-curing. The matrix material includes (A) alginate and (B) water. The curing agent slurry mainly includes (C) gelling agent, (D) insoluble organic solvent and (E) humectant.
Alginate impression material is an elastic and irreversible hydrocolloid impression material. Good performance and low price.
Alginate impression material is a kind of elastic and irreversible hydrocolloid impression material. The dispersion medium of this material is water, also known as hydrocolloid impression material. The alginate impression material has the advantages of good fluidity, elasticity, plasticity, accuracy, stable size, no chemical change with the model material, low price, and convenient use, so it is most commonly used at present.
Common ones are sodium alginate, potassium alginate and ammonium alginate, which are divided into powder form and paste. The powder type is mixed with water, and the paste type is used with cement.
Alginic acid is a kind of colloidal acid extracted from seaweed. It is a polymer of D-mannuronic acid with a molecular weight between 5000-15000. It can form potassium, sodium, ammonium and other salts of D-mannuronic acid. The molecular weight is directly proportional to the viscosity of the material. Generally, the medium viscosity is used, and the medium viscosity can meet the requirements of elasticity and strength.
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