Alginatos
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Transcript of Alginatos
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