1. Universidad Autónoma de Ciudad Juárez
Departamento de estomatología.
Yeso parís o Yeso Blanco
Alumna. Medina Hernández Brianda
Isidra
Dr. Alfredo Nevárez Rascón

2.  Is a fragile plaster which is obtained by
heating gypsum at 110 ° c, is used for castingstudy
models, has a strength of 450 kg per cm2
Fig. 2
Ground gypsum
http://upload.wikimedia.org/wikipedia/commons/
a/a7/Calcium_sulfate_hemihydrate.jpg

3. Plaster of paris is also called:
Fig.3
•Gypsum Modelo de yeso tipo II
•Snow White.
•Gypsum plaster
•White Plaster
•Type II.
http://es.ruthinium.it/dentadura-postiza/productos/plasters/

4.  This is the most used in dentistry, is used for
mounting on articulator and prosthesis
Fig. 4
Prosthesis
model made ​with plaster
paris.
http://www.evolucionodontologica.com/?cat=17&paged=2

5.  Common plaster
 Yeso of París o Type II
 Lime plaster
 Cement plaster
Fig.5
Cement plaster.
http://materialdental.blogspot.com/2011/02/yes
os-de-uso-dental.html

6.  All have the same chemical formula.
 They have different physical properties.
 All they are derived from same material
 The main difference is the way to eliminate some of
the water gave hydrated sulfate.
 You can also use synthetic gypsum to manufacture
some products but are less popular because of its
high cost.

7.  The water is placed in a plastic cup. Powder is added.
 Allowed to stand in water for about 30 seconds. It
minimizes the amount of air that is incorporated into
the mixture during the mixing.
 Perform the mixing with a rigid sheet metal spatula.
 The manual consists spatula stir the mixture
vigorously. Properly mix to obtain a uniform mixture,
rubbing in circular motions and try to dissolve any
lumps and to wet the entire mixture

8. In dental use is found as:
Calcium Sulfate CaSO4 · H2O.
And when mixed with water :
CaSO2· 2H2O
Fig.6
Calcium Sulfate
http://fyq4eso.blogspot.com/feeds/posts/default

9.  optimal immobilization  Dirty apply.
 Moldable.  Takes to set.
 Cheap.  Voluminous.
 No loss of volume.  Heavy.
 Do not wet.

10.  Gyprock Dental Plaster.
 Boral.
 Denflo.
 Yemsa.

11.  http://es.wikipedia.org/wiki/Yeso#Yeso_Par.C3.ADs_o_Tipo_II
 http://www.tuodontologo.com/tuodon/articulo.php?idarticulo=
272&tipocategoria=o
 http://www.slideshare.net/GrupoIsep/clases-de-yesos-en-
odontologa
 http://depositodental.tripod.com/marcas.html
 http://dentala2z.co.uk/Yeso-De-Piedra
 http://protesistadental.blogspot.com/2006/11/clasificacin-de-
yesos_116395478531374938.html
 http://www.monografias.com/trabajos88/yesos-dentales-
utilizados-odontologia/yesos-dentales-utilizados-
odontologia.shtml
 http://www.slideshare.net/abuelo1990/yeso-odontologico