The basic constituent of reversible hydrocolloid impression material is________________?

Related Mcqs:

1. A technique of combining reversible and irreversible hydrocolloid that could bond to irreversible hydrocolloid is known as________________?

   A. Injecting technique
   B. Laminate technique
   C. Immersion technique
   D. Tempering technique

2. Which of the following is true about Agar hydrocolloid impression material ?

   A. Liquefies between 71 – 100°C
   B. Solidfies between 50 – 70°C
   C. Facilitates fabrication of metal dyes
   D. Cannot register fine surface details

3. Alginate impression material is similar to Agar-agar impression material in the following respect________________?

   A. Gelation increase in both on increase in temperature
   B. Mixing time is increased to reduce the setting time
   C. Deformation during removal of impression occurs due to distortion of gel fibers
   D. Both can be re-used for fresh impressions

4. In reversible hydrocolloid the property by which the transformation from sol to gel and gel to sol is a function of the_____________?

   A. Concentration of filler and plasticizer
   B. Percentage composition by weight of water
   C. Concentration of potassium sulphate
   D. Temperature

5. Which one of the following increase the strength and reduce viscosity of agar hydrocolloid impression material_____________?

   A. Borax
   B. Water
   C. Sulfates
   D. Carbonates

6. The best way to remove a hydrocolloid impression from the patient’s mouth is____________?

   A. Slight rocking of the impression to disengage it from the undercut
   B. Wetting the periphery of the impression with moist cotton to break the peripheral seal
   C. Sudden jerking of the impression to prevent tearing
   D. Supporting the impression along with the tray to prevent disengaging of the tray alone

7. Best impression material to be used for securing impression after crown preparation_______________?

   A. Alginate
   B. Agar
   C. Elastome
   D. Zno paste

8. Hydrocolloid material, show all except______________?

   A. Hysterisis
   B. Imbibition
   C. Recrytallisation
   D. Syneresis

9. Alginate impression material is________________?

   A. Non-elastic impression material
   B. Thermoplastic impression material
   C. More mucostatic than ZOE
   D. Less mucostatic than ZOE

10. Agar impression materials differ from alginate impression materials in that the former sets by_______________?

    A. Mechanical action of saliva
    B. Physical change
    C. Evolution
    D. Chemical change