1 - 4th state of matter is______________?
1 - 4th state of matter is______________?
Colloid
2 - Agar impression materials differ from alginate impression materials in that the former sets by_______________?
2 - Agar impression materials differ from alginate impression materials in that the former sets by_______________?
Physical change
3 - Agar is prepared from_______________________?
3 - Agar is prepared from_______________________?
Sea weed
4 - Alginate impression material is________________?
4 - Alginate impression material is________________?
Less mucostatic than ZOE
5 - Alginates are_____________?
5 - Alginates are_____________?
Hydrocolloid
6 - All of the following statements about an alginate impression are EXCEPT________________?
6 - All of the following statements about an alginate impression are EXCEPT________________?
It may exhibit fluid exudates on the surface as a result of imbibition of water
7 - During setting of alginate impression materials________________?
7 - During setting of alginate impression materials________________?
Trisodium phosphate reacts with calcium sulphate
8 - Immediate pouring of impressions is most critical in_____________?
8 - Immediate pouring of impressions is most critical in_____________?
Condensation polysillicon
9 - In reversible hydrocolloid the property by which the transformation from sol to gel and gel to sol is a function of the_____________?
9 - In reversible hydrocolloid the property by which the transformation from sol to gel and gel to sol is a function of the_____________?
Temperature
10 - K2SO4 in agar-agar is for_______________?
10 - K2SO4 in agar-agar is for_______________?
Accelerating the setting stage of gypsum
11 - Lenolin is added is ZOE paste to______________?
11 - Lenolin is added is ZOE paste to______________?
Increase flow
12 - Linear contraction of elostomeric impression with passage of time is highest in______________?
12 - Linear contraction of elostomeric impression with passage of time is highest in______________?
Condensation silicone
13 - Name the accelerator used in Zinc oxide eugenol paste______________?
13 - Name the accelerator used in Zinc oxide eugenol paste______________?
Zinc acetate
14 - Palatal secretions affect the setting of all the impression materials except_______________?
14 - Palatal secretions affect the setting of all the impression materials except_______________?
Agar-agar
15 - Palladium is added to polyvinyl siloxane to_____________?
15 - Palladium is added to polyvinyl siloxane to_____________?
Act as a scavenger
16 - Perforated impression tray are used for_______________?
16 - Perforated impression tray are used for_______________?
Alginate
17 - Retarder in Zinc oxide eugenol is______________?
17 - Retarder in Zinc oxide eugenol is______________?
Glycerine
18 - Rinsing of the impression is important to________________?
18 - Rinsing of the impression is important to________________?
Remove saliva
19 - Rubber base impressions are poured immediately as they_______________?
19 - Rubber base impressions are poured immediately as they_______________?
Continue to polymerize
20 - Syneresis is associated with______________?
20 - Syneresis is associated with______________?
Hydrocolloids
21 - Syringe material is______________?
21 - Syringe material is______________?
Low viscosity elastomer
22 - The advantage of ZOE impression paste_______________?
22 - The advantage of ZOE impression paste_______________?
Has dimensional stability
23 - The best way to remove a hydrocolloid impression from the patient's mouth is____________?
23 - The best way to remove a hydrocolloid impression from the patient's mouth is____________?
Sudden jerking of the impression to prevent tearing
24 - The cross linking agent of polysulphide rubber base impression material is______________?
24 - The cross linking agent of polysulphide rubber base impression material is______________?
Lead dioxide
25 - The impression for a diagnostic cast of a partial edentulous mouth should be taken in_______________?
25 - The impression for a diagnostic cast of a partial edentulous mouth should be taken in_______________?
Hydro-colloid
26 - The impression material used to record the prepared areas on abutment teeth is______________?
26 - The impression material used to record the prepared areas on abutment teeth is______________?
Low viscosity elastomeric impression material
27 - The impression with the least dimensional change upon disinfection is_______________?
27 - The impression with the least dimensional change upon disinfection is_______________?
Addition poly silicone
28 - The most mucostatic impression material is_______________?
28 - The most mucostatic impression material is_______________?
Thin mix of plaster of paris
29 - The plasticizers used in polyether impression material is_______________?
29 - The plasticizers used in polyether impression material is_______________?
Glycol ether
30 - The setting time of irreversible hydrocolloids can be decreased by_____________?
30 - The setting time of irreversible hydrocolloids can be decreased by_____________?
Raising the temperature of water used for maxing
31 - The term given to the phenomenon of moisture absorption by an alginate impression in________________?
31 - The term given to the phenomenon of moisture absorption by an alginate impression in________________?
Imbibition
32 - The water powder ratio of alginate is______________?
32 - The water powder ratio of alginate is______________?
40 ml of water to 15 gms of powder
33 - Type I and Type II zinc oxide impression paste differ with respect to_______________?
33 - Type I and Type II zinc oxide impression paste differ with respect to_______________?
Their hardness after setting
34 - Wash or corrective impression is done by______________?
34 - Wash or corrective impression is done by______________?
Impression paste
35 - When making a polysulphide impression for a caste crown, custom trays are usually preferred over stock trays for all of the following reasons except_______________?
35 - When making a polysulphide impression for a caste crown, custom trays are usually preferred over stock trays for all of the following reasons except_______________?
Impressions made n the custom trays are easier to remove from the mouth
36 - Which is best material for RPD impression_______________?
36 - Which is best material for RPD impression_______________?
Irreversible hydrocolloid
37 - Which material undergoes hysteresis ?
37 - Which material undergoes hysteresis ?
Reversible hydrocolloid
38 - Which of the following is not affected by saliva ?
38 - Which of the following is not affected by saliva ?
None of the above
39 - Which of the following is true about Agar hydrocolloid impression material ?
39 - Which of the following is true about Agar hydrocolloid impression material ?
Liquefies between 71 – 100°C
40 - Which one of the following increase the strength and reduce viscosity of agar hydrocolloid impression material_____________?
40 - Which one of the following increase the strength and reduce viscosity of agar hydrocolloid impression material_____________?
Borax
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