what are the uses of (gypsum in dentistry) ?

gypsum in dentistry: Dental plaster is used to make many dental models and molds .In dentistry, the morphology of hard and soft tissues is molded and models and molds are prepared using materials that are initially liquid and can create a rigid replica. So far, many materials have been used to produce models and molds. But the most popular are materials based on gypsum products.

gypsum

Gypsum is a white, natural mineral mineral known as calcium sulfate dehydrated glass. Dental gypsum, however, is based on hemihydrated calcium sulfate and is used to make models or DIE. Current ISO standard for dental gypsum Specify 5 types of material:

Plaster uses for dentistry

1- The first type of dental plaster that is used for molding

2- Dental plaster that is used to make a model

3- Dental stone is used to make DIE

4- Medical orthodontics causes high resistance and expansion coefficient.

5- Dental stone causes very high resistance

Why plaster in dentistry?

Gypsum products used in dentistry are produced by removing part of the crystallization water from the gypsum and forming calcium sulfate hemihydrate. Models and molds made of dental plaster are cheap and easy to use. Also, molding using dental plaster has good accuracy and dimensional stability. Dental plaster can follow small details, but it is strong enough to make a hole. Do not plaster. Dental plaster is not completely ideal in terms of mechanical properties, and some of the fragile nature of the plaster causes cracks and fractures in the model or mold.

Methods of use

The time required for the plaster to dry is divided into two stages: 1: initial drying and 2: final drying. Dental plaster is very suitable for making dental models and molds due to its good dimensional stability and high strength, which is why gypsum is a very popular and practical material in dentistry. Regarding the use of gypsum in dentistry, it can be mentioned that it is effective for installing casts or orthodontics, but it should be noted that the mentioned models are normally produced from dentition and from a very strong derivative. It is wetter, denser and harder than gypsum and will be made with gypsum pressure. Other uses of gypsum in medicine include artificial prostheses or artificial teeth, which are made of a very soft and flexible material that in The truth is used around the teeth and gums.

To make dental stones, we need the help of gypsum, which has a strong material and is done in the form. Gypsum is boiled in a saline solution such as (cac12). The result of this process is a substance similar to that produced by autoclave, but its porosity will be even less. Manufacturers usually add a small amount of dye to the dental calculus to remove it. Distinguish ordinary dental plaster. The steps of using gypsum products in dentistry include hydration of calcium sulfate hemihydrate with water to produce dehydrated calcium sulfate. Keep in mind that in the manufacture of dental plaster, further heating of the plaster may cause further loss of water and the formation of calcium sulfate anhydrite. Also, if the plaster is not heated enough, a significant concentration of hydrate will remain in it, so it should be Maintain balance in it