PROFESOR…DR. ALFREDO NEVAREZ RASCON.

CLASSIFICATION OF PRINT MATERIALS .. (ALGINATOS.)

ODONTOLOGI A ..UACJ.

DR…MISAEL PALACIOS

In the printing materials are:

ELASTIC: those that pass from a fluid state to a highly elastic. Or solid which can be removed from undercuts with relative ease and with minimal deformation.

THESE ARE CLASSIFIED IN TURN IN:

HYDROCOLLOIDS.

-Reversible (AGAR-AGAR)-Irreversible(ALGINATO)

2.ELASTOMERS

-Poly mercaptano sulfuré.-Silicona por condensación-Addition silicone-poliésteres

FIG.02-PRINTING OF SILICON.

FIG 03-SILICONE IMPRESSION BY CONDENSATION

NON ELASTICS : Those materials that react assume rigidity, and in some cases little or no elasticity.CLASSIFIED IN TURN IN:

1-type plaster Paris.2-molding compounds.3-impression pastes.4-wax to take impressions.5-Polymers to take impressions

FIG.4-PLASTER PARIS

FIG.-5 WAX PRINT

ALGINATES»

FIG.-6 Alginate impression FIG7- Alginate impressions

WHAT IS THE ALGINATE???..

Alginate is a purified chemical obtained from brown seaweeds. These substances are for organic polymers derived from alginic acid.

FIG.-8 BROWN ALGAE

CARACTERISTICAS»Son compuestos que incluyen una variedad de productos constituidos por los ácidos D-MANURICO y L-GULURONICO y que son extraídos de algas marrones conocidas como Phaeophyceae, siendo que las más importantes para la producción comercial de los alginatos.

FIG.-9 ALGAS PARDAS (PHAEOPHYCEAE

CLASSIFICATION ALGINATES»

Alginates with additives: additives were added to improve the surface

Alginates chromatic: alginates which are added are pH indicatorsIn order to know when to remove the teaspoon

Alginates with antiseptic substances: these substances was added as chlorhexidine in order to avoid cross infection

USES OF THE ALGINATE»Alginate is a material widely used in dentistry for impressions of teeth and adjacent soft tissues.

FIG.-10 INSTRUMENTAL ALGINATE

FIG.-11 PRINT MAKING ALGINATE

Components»

The main component of the alginate is the sodium salt of the acid alguinio.

Furthermore, the powder contains calcium sulfate, trisodium phosphate.

(Trisodium phosphate allows a more prolonged handling of the preparation, thus it is said that retards the staling)

ADVANTAGES»

-ECONOMIC.

-EASY HANDLING.

-Hydrophilic properties

FIG.-12 MAKING CORRECT alginate impression.

DISADVANTAGES»

-dimensional changes

-Low-fidelity details

-Elastic Recovery

FIG.-13 STRUCTURE FAILED alginate impression.

TRADEMARKS»

-Alidel-Ortho print-Phase-Cavec k 37-hydro gum

BIBLIOGRAPHY»

http://www.google.com.mx/search?tbm=isch&hl=es&source=hp&biw=1024&bih=677&q=alginato&gbv=2&oq=alginato&aq=f&aqi=g10&aql=&gs_sm=e&gs_upl=886l3208l0l3605l8l8l0l1l1l0l254l921l0.4.1l5l0

http://www.elprisma.com/apuntes/odontologia/alginatos/

http://odontored.wordpress.com/2011/08/12/clasificacion-de-los-materiales-de-impresion/

http://es.wikipedia.org/wiki/Alginato