The role of magnesium chloride in zinc oxide eugenol impression paste_________________?

Related Mcqs:

1. Eugenol may be replaced in the zinc oxide eugenol cement by______________?

   A. Acetic acid
   B. Alginic acid
   C. Phosphoric acid
   D. Ortho-ethoxy acid

2. The Zinc oxide-eugenol impression pastes harden by________________?

   A. Chemical reaction
   B. Cold
   C. Heat
   D. Pressure

3. All of the following can be used to slow down the setting of Zinc oxide eugenol impression paste EXCEPT_________________?

   A. Adding a small amount of glycerine
   B. Adding a small amount of water
   C. Altering the amounts of the two pastes used
   D. Cooling mixing slab

4. Name the accelerator used in Zinc oxide eugenol paste______________?

   A. Olive oil
   B. Linseed oil
   C. Zinc acetate
   D. All of these

5. Retarder in Zinc oxide eugenol is______________?

   A. CaCl2
   B. Zinc acetate
   C. Alcohol
   D. Glycerine

6. All of the following is used as accelerator in zinc oxide eugenol cement except_____________?

   A. Acetic acid
   B. Zinc acetate dehydrate
   C. Calcium chloride
   D. Bromoglycerine

7. Which component of zinc oxide-eugenol cement gives its strength ?

   A. Rosin
   B. Zinc oxide
   C. Zinc acetate
   D. Oil of cloves

8. All of the following statements are true for zinc oxide eugenol cements except______________?

   A. Equal lengths of base paste and accelerator paste are mixed together until the mix has a uniform colour
   B. Increase in temperature and humidity shorten the setting time
   C. The mix appear thick at the start of mixing but after 30 seconds of additional spatulation it becomes more fluid
   D. Water accelerates but heat retards the setting of zinc oxide eugenol cements
   E. Both C & D

9. About zinc oxide eugenol all are true except_______________?

   A. ZnO is converted to Zn(OH)2
   B. Reaction is autocatalytic
   C. Water is the byproduct of reaction
   D. Dehydrated ZnO reacts with dehydrated eugenol

10. All of the following is used as accelerator in zinc oxide eugenol cement except_______________?

    A. Acetic acid
    B. Zinc acetate dehydrate
    C. Calcium chloride
    D. Bromoglycerine