Which one of the following increase the strength and reduce viscosity of agar hydrocolloid impression material_____________?
A. Borax
B. Water
C. Sulfates
D. Carbonates
Dental Materials
The water powder ratio of alginate is______________?
The water powder ratio of alginate is______________?
A. 100 ml of water to 60 gms of powder
B. 40 ml of water to 40 gms of powder
C. 40 ml of water to 15 gms of powder
D. 15 ml of water to 40 gms of powder
Best impression material to be used for securing impression after crown preparation_______________?
Best impression material to be used for securing impression after crown preparation_______________?
A. Alginate
B. Agar
C. Elastome
D. Zno paste
Which of the following is correct glass transition temperature of Impression compound ?
Which of the following is correct glass transition temperature of Impression compound ?
A. 43.5°C
B. 39°C
C. 65°C
D. 100°C
Rough and irregular surface produced on the impression is because of_______________?
Rough and irregular surface produced on the impression is because of_______________?
A. Air incorporated during mixing
B. Improper application of pressure during impression making
C. Presence of excessive saliva in impression area
D. Due to improper ratio of polymer and monomer
Minimum flow of Type-I impression compound at mouth temperature is___________________?
Minimum flow of Type-I impression compound at mouth temperature is___________________?
A. 4%
B. 6%
C. 8%
D. 10%
Polysulfide material is routinely not recommended because of_______________?
Polysulfide material is routinely not recommended because of_______________?
A. Unpleasant odor and taste
B. Low accuracy
C. Least permanent deformation
D. Highest curing shrinkage
Hydrocolloid material, show all except______________?
Hydrocolloid material, show all except______________?
A. Hysterisis
B. Imbibition
C. Recrytallisation
D. Syneresis
Impression material that Do NOT harden by chemical reaction_______________?
Impression material that Do NOT harden by chemical reaction_______________?
A. Zinc oxide eugenol
B. Impression compound
C. Alginate
D. Plaster of paris
Putty wash technique_________________?
Putty wash technique_________________?
A. Light body and putty used at the same time
B. Putty used first and light body used second
C. Light body first and putty later
D. None of the above