Method for improving powder falling of dental gypsum

Abstract

The invention discloses a method for improving powder falling of dental gypsum. The method comprises the following steps: S100, preparing a base material: taking natural dihydrate gypsum powder, producing through a liquid phase method process, and carrying out ball milling to prepare semi-hydrated high-strength gypsum powder; S200, weighing and preparing a base material and an additive: taking 100 parts of the prepared semi-hydrated high-strength gypsum powder, 0.001-1 part of a reinforcing agent, 0.001-0.5 part of a retarder, 0-1 part of a pigment, 0.01-1 part of a toughening agent, 0.01-1 part of a defoaming agent and 0-1 part of an expansion inhibiting agent for later use; and S300, performing dry-process mixing preparation: stirring and mixing the semi-hydrated high-strength gypsum powder, the reinforcing agent, the retarder, the pigment, the flexibilizer, the defoaming agent and the swelling inhibitor in proportion. The method has the beneficial effects that under the synergistic effect of all the components, the surface strength of the dental gypsum is improved, and powder falling during demolding of the dental gypsum and a film printing material is avoided. The toughness of the dental gypsum is also improved, and the defects that the gypsum is crisp and is not easy to repair when a dental gypsum model is repaired are overcome. The dental gypsum is low in price, excellent in performance and good in clinical application effect.

Description

technical field [0001] The invention relates to the technical field of dental gypsum powder, in particular to a method capable of improving powder shedding of dental gypsum. Background technique [0002] At present, due to the different raw materials and formulations of the commonly used dental plaster powders in the market, the dental plaster models produced after hydration are uneven. The main manifestations are: some dental plaster models have dental plaster solidification Low final strength, large expansion, and inaccurate dimensions; and some dental plaster models have the phenomenon of dental plaster and printing materials falling off when taking the impression. These phenomena have all influenced the precision of dental plaster model making, brought potential safety hazard to patient. All the existing disclosed technologies only describe how to prepare dental gypsum products, but do not mention how to solve the problem of dental gypsum powder dropping when the dental...

AI Technical Summary

Problems solved by technology

[0002] At present, due to the different raw materials and formulations of the commonly used dental plaster powders in the market, the dental plaster models produced after hydration are uneven. The main manifestations are: some dental plaster models have dental plaster solidification Low final strength, large expansion, and inaccurate dimensions; and some dental plaster models have the phenomenon of dental plaster and printing film materials falling off when taking the mold

These phenomena have affected the accuracy of dental plaster model making, bringing safety hazards to patients

All the existing disclosed technologies only describe how to prepare dental gypsum products, but do not mention how to solve the problem of dental gypsum powder dropping when the dental gypsum is in contact with the printing film material to take the mold. Therefore, there is an urgent need in the market to improve The Method of Dental Gypsum and Printing Material Contacting for Powder Dropping when Taking Impressions

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