Preparation method of composite alginate agar impression material

An impression material and alginate technology, which is applied in the direction of dental impression materials, compression cups, dental preparations, etc., can solve the problems of slow water permeability of powder, poor dimensional accuracy, easy volume shrinkage, etc., and improve water absorption and water retention. Ability, not easy to shrink in volume, the effect of accelerating the absorption rate

Inactive Publication Date: 2019-05-21
谷佑芽
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Problems solved by technology

[0007] The main technical problem to be solved by the present invention is to solve the defects of simple alginate impression material powder, such as slow water permeability, poor water absorption and water retention capacity, easy volume shrinkage, poor viscoelasticity, poor dimensional accuracy, and poor antibacterial performance. A preparation method of alginate agar composite impression material

Method used

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Examples

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preparation example Construction

[0035] Preparation of bamboo charcoal viscose fiber: Mix the above reaction product with 400mL of magnesium sulfate solution with a mass fraction of 25% and stir for 30min, filter, remove the filtrate to obtain filter residue, then wash with absolute ethanol and place in an oven, heat up to 50°C , dry for 2 hours to obtain solid cellulose xanthate, add 100 mL of 20% sodium hydroxide solution to the solid cellulose xanthate, soak it for 2 hours and take it out to obtain viscose fiber, heat up to 300 °C under nitrogen protection ℃, thermal insulation carbonization treatment for 20min, to obtain bamboo charcoal viscose fiber.

[0036] Preparation of agar solution: mix chitosan with 85% acetic acid solution in a mass ratio of 1:3 to obtain a chitosan solution, stir and disperse agar powder in a beaker equipped with distilled water, control the agar powder and The mass ratio of distilled water is 1:4, put the beaker in a water bath, heat up to 90°C, heat and dissolve for 30min, and...

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Abstract

The invention belongs to the technical field of dental medical material preparation and particularly relates to a preparation method of a composite alginate agar impression material. According to themethod, viscose fibers are obtained by taking cellulose and carbon disulfide as raw materials, a chitosan solution with certain concentration and an agar solution with certain concentration are prepared, porous gel is obtained by freeze drying and soaked in a mixed solution of the bamboo charcoal viscose fibers and corn starch to obtain an impression blank, and then raw materials such as the impression blank, natural polysaccharide and maltitol are mixed and heated to obtain the composite alginate agar impression material. According to the method, an ionic crosslinking effect is achieved between carboxyl and amino on chitosan, the viscoelasticity performance of the impression material can be improved, and through hydrogen bonding interaction among starch, cellulose, chitosan and agar, a net-shaped water retention structure of hydrogel is formed; through the synergistic effect among bamboo charcoal fiber mucilage glue, the chitosan and other water-absorbable raw materials, the water absorption and retention performance of the impression material is improved, and a broad application prospect is achieved.

Description

technical field [0001] The invention belongs to the technical field of preparation of dental medical materials, and in particular relates to a preparation method of an alginate agar composite impression material. Background technique [0002] The impression is the negative model of the object, and the material used to make the impression is the impression material. The process of impression can be understood as copying, copying, which is to produce the same copy from the prototype. Oral impressions are negative molds used to record and reproduce the shape and shutdown of oral tissues. The material selected when making the oral impression becomes the oral impression material. [0003] 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 ...

Claims

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Application Information

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IPC IPC(8): A61K6/10A61K6/00C08J9/42C08L5/08C08L5/12D01F2/08A61K6/90
Inventor 谷佑芽何俊欣张淑娴
Owner 谷佑芽
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