1 - Which of the following is correct glass transition temperature of Impression compound ?
1 - Which of the following is correct glass transition temperature of Impression compound ?
39°C
2 - A laminate impression technique utilizes_______________?
2 - A laminate impression technique utilizes_______________?
Syringe agar and chilled tray alginate
3 - A technique of combining reversible and irreversible hydrocolloid that could bond to irreversible hydrocolloid is known as________________?
3 - A technique of combining reversible and irreversible hydrocolloid that could bond to irreversible hydrocolloid is known as________________?
Laminate technique
4 - Agar syringe material can be used with/as______________?
4 - Agar syringe material can be used with/as______________?
Both of the above
5 - Alginate impression material is similar to Agar-agar impression material in the following respect________________?
5 - Alginate impression material is similar to Agar-agar impression material in the following respect________________?
Deformation during removal of impression occurs due to distortion of gel fibers
6 - Alginates are made dust free by adding______________?
6 - Alginates are made dust free by adding______________?
Glyecrol
7 - All of the following can be used to slow down the setting of Zinc oxide eugenol impression paste EXCEPT_________________?
7 - All of the following can be used to slow down the setting of Zinc oxide eugenol impression paste EXCEPT_________________?
Adding a small amount of water
8 - All of the following statements about Type II silicon impression material are true EXCEPT_______________?
8 - All of the following statements about Type II silicon impression material are true EXCEPT_______________?
They set by condensation polymerisation
9 - Before pouring an elastic impression it is washed with slurry of water and stone to______________?
9 - Before pouring an elastic impression it is washed with slurry of water and stone to______________?
Wash off saliva on impression
10 - Best material for duplicating cast is_______________?
10 - Best material for duplicating cast is_______________?
Agar-agar
11 - Brush heap structure is found in______________?
11 - Brush heap structure is found in______________?
Agar
12 - By product of condensation reaction between silicone base and alkyl silicate in presence of tin octate_______________?
12 - By product of condensation reaction between silicone base and alkyl silicate in presence of tin octate_______________?
Ethyl alcohol
13 - Dimensional stability of elastomeric impression material can be given in descending order as_____________?
13 - Dimensional stability of elastomeric impression material can be given in descending order as_____________?
Addition silicone > polyether > Polysulphide > Condensation silicone
14 - Dimensional stability of hydrocolloid impressions may be achieved by_________________?
14 - Dimensional stability of hydrocolloid impressions may be achieved by_________________?
Using humidor
15 - Dustless alginate is produced by______________?
15 - Dustless alginate is produced by______________?
Coating with dihydric alcohol
16 - Elastomers are_________________?
16 - Elastomers are_________________?
Polyethers
17 - Elastomers except: Polyether are_______________?
17 - Elastomers except: Polyether are_______________?
Hydrophobic
18 - Final product in alginate is________________?
18 - Final product in alginate is________________?
Calcium alginate
19 - Gelation temparature of agar is between________________?
19 - Gelation temparature of agar is between________________?
37°C to 50°C
20 - Hardening solutions are used with impression made of________________?
20 - Hardening solutions are used with impression made of________________?
Hydrocolloid
21 - Heavy and light body impression materials are use with______________?
21 - Heavy and light body impression materials are use with______________?
A and B
22 - Hydrocolloid material, show all except______________?
22 - Hydrocolloid material, show all except______________?
Recrytallisation
23 - Hypersensitivity reactions like contact dermatitis can be caused by______________?
23 - Hypersensitivity reactions like contact dermatitis can be caused by______________?
Polyether
24 - Hysteresis in a hydrocolloid gel is______________?
24 - Hysteresis in a hydrocolloid gel is______________?
Temperature lag between gelation and liquefaction temperature
25 - Impression compound base_____________?
25 - Impression compound base_____________?
Low thermal conductivity
26 - Impression compound has which of the following characteristic property ?
26 - Impression compound has which of the following characteristic property ?
Low thermal conductivity
27 - Impression compound is characterized by all of the following except_______________?
27 - Impression compound is characterized by all of the following except_______________?
Is a thermoset material
28 - Impression material that Do NOT harden by chemical reaction_______________?
28 - Impression material that Do NOT harden by chemical reaction_______________?
Impression compound
29 - Impression plaster is_____________?
29 - Impression plaster is_____________?
Less compressive than alginate
30 - Impression techniques are used for recording________________?
30 - Impression techniques are used for recording________________?
Oral mucosal tissues and dental hard tissues
31 - Inelastic impression material is_____________?
31 - Inelastic impression material is_____________?
Impression compound
32 - Masterial causing minimum tissue distortion is______________?
32 - Masterial causing minimum tissue distortion is______________?
Impression plaster
33 - Minimum flow of Type-I impression compound at mouth temperature is___________________?
33 - Minimum flow of Type-I impression compound at mouth temperature is___________________?
0.06
34 - Most flexible impression material______________?
34 - Most flexible impression material______________?
Impression compound
35 - Most ideally elastic among the following_______________?
35 - Most ideally elastic among the following_______________?
Addition silicone
36 - Most mucostatic among the following_____________?
36 - Most mucostatic among the following_____________?
ZOE paste
37 - Most rigid elastomer is___________________?
37 - Most rigid elastomer is___________________?
Polyether
38 - One of the most important advantages of truly elastic impression material would be its capacity for______________?
38 - One of the most important advantages of truly elastic impression material would be its capacity for______________?
With drawl without permanent distortion
39 - Polysulfide material is routinely not recommended because of_______________?
39 - Polysulfide material is routinely not recommended because of_______________?
Unpleasant odor and taste
40 - Putty wash technique_________________?
40 - Putty wash technique_________________?
Putty used first and light body used second
41 - Rapid removal of rubber impression with a single firm motion results in____________________?
41 - Rapid removal of rubber impression with a single firm motion results in____________________?
Minimal permanent deformation
42 - Rough and irregular surface produced on the impression is because of ?
42 - Rough and irregular surface produced on the impression is because of ?
Too rapid polymerization
43 - Rough and irregular surface produced on the impression is because of_______________?
43 - Rough and irregular surface produced on the impression is because of_______________?
Due to improper ratio of polymer and monomer
44 - Rough surface of elastomeric impression results from_______________?
44 - Rough surface of elastomeric impression results from_______________?
Incomplete polymerization caused by premature removal from mouth
45 - Setting time of ZOE is best controlled by______________?
45 - Setting time of ZOE is best controlled by______________?
Cooling the glass slab
46 - Sol – gel transformation is seen in________________?
46 - Sol – gel transformation is seen in________________?
Hydrocolloids
47 - Syneresis seen in hydrocolloid gel is______________?
47 - Syneresis seen in hydrocolloid gel is______________?
Seen as water loss
48 - Tear strength for impression material is highest for__________?
48 - Tear strength for impression material is highest for__________?
Polysulfide
49 - The American dental association (ADA) specification number for non-aqueous elastomeric dental impression material is______________?
49 - The American dental association (ADA) specification number for non-aqueous elastomeric dental impression material is______________?
19
50 - The base paste of the condensation poly sillicone has a low molecular weight dimethyl siloxane with a terminal-group_______________?
50 - The base paste of the condensation poly sillicone has a low molecular weight dimethyl siloxane with a terminal-group_______________?
Hydroxyl group
51 - The basic constituent of reversible hydrocolloid impression material is________________?
51 - The basic constituent of reversible hydrocolloid impression material is________________?
Agar
52 - The impression materials with lowest viscosity is_____________?
52 - The impression materials with lowest viscosity is_____________?
Plaster of paris
53 - The process of changing the rubber base product or liquid polymer, to a rubber like material is generally known as_____________?
53 - The process of changing the rubber base product or liquid polymer, to a rubber like material is generally known as_____________?
Vulconization
54 - The ranking of tear strength from the lowest to highest of all impression materials generally is as follows_______________?
54 - The ranking of tear strength from the lowest to highest of all impression materials generally is as follows_______________?
Hydrocolloids, silicones, polyether, polysulfide
55 - The relative hardness of elastomere is determined using________________?
55 - The relative hardness of elastomere is determined using________________?
Shore durometer
56 - The role of magnesium chloride in zinc oxide eugenol impression paste_________________?
56 - The role of magnesium chloride in zinc oxide eugenol impression paste_________________?
Accelerator
57 - The Zinc oxide-eugenol impression pastes harden by________________?
57 - The Zinc oxide-eugenol impression pastes harden by________________?
Chemical reaction
58 - To make the vinyl Polysiloxane hydrophilic the following is added_______________?
58 - To make the vinyl Polysiloxane hydrophilic the following is added_______________?
Surfactant
59 - Trisodium phosphate added to alginate contributes towards_______________?
59 - Trisodium phosphate added to alginate contributes towards_______________?
increasing the working time of alginate impression material
60 - Trisodium phosphate in alginate acts are_______________?
60 - Trisodium phosphate in alginate acts are_______________?
Retarder
61 - Two in one stage impression materials include______________?
61 - Two in one stage impression materials include______________?
Elastomeric impression material
62 - Vulcanization refers to the setting of__________________?
62 - Vulcanization refers to the setting of__________________?
Mercaptan impression material
63 - What is the minimum thickness of the elastomeric impression material for an accurate impression_______________?
63 - What is the minimum thickness of the elastomeric impression material for an accurate impression_______________?
Maximum in the area of operation
64 - Which material is the most difficult to remove from the patients mouth ?
64 - Which material is the most difficult to remove from the patients mouth ?
Metallic oxide paste
65 - Which of the following best describes the working time of elastomeric impression material ?
65 - Which of the following best describes the working time of elastomeric impression material ?
Just before the start of appearing elastic properties of impression material
66 - Which of the following best describes the working time of impression material ?
66 - Which of the following best describes the working time of impression material ?
The time for start of mixing till just before the start of appearing elastic properties of impression material
67 - Which of the following component acts as an accelerator in ZOE impression paste ?
67 - Which of the following component acts as an accelerator in ZOE impression paste ?
Zinc Sulphate & Zinc chloride
68 - Which of the following impression material is elastic________________?
68 - Which of the following impression material is elastic________________?
Polyvinyl siloxane
69 - Which of the following impression material is rigid ?
69 - Which of the following impression material is rigid ?
Zinc oxide-eugenol
70 - Which of the following impression material requires a hardener ?
70 - Which of the following impression material requires a hardener ?
Agar
71 - Which of the following impression materials is easy to pour and difficult to remove the stone cast from the impression ?
71 - Which of the following impression materials is easy to pour and difficult to remove the stone cast from the impression ?
Polysulfide
72 - Which of the following is correct arrangement of impression material regarding linear contraction in ascending order ?
72 - Which of the following is correct arrangement of impression material regarding linear contraction in ascending order ?
Addition silicone < polyether < polysulfide < condensation silicone
73 - Which of the following is correct regarding chemical setting of condensation silicone_______________?
73 - Which of the following is correct regarding chemical setting of condensation silicone_______________?
Polymerization occurs with repeated elimination of small molecules
74 - Which of the following is not true about elastomeric impression ?
74 - Which of the following is not true about elastomeric impression ?
Single mix material have higher viscosity
75 - Which of the following is used as surface hardener in Impression material ?
75 - Which of the following is used as surface hardener in Impression material ?
2% Potassium sulfate
76 - Which one of the following impression materials is elastic, sets by a chemical reaction and is catalyzed by chloroplatinic acid_______________?
76 - Which one of the following impression materials is elastic, sets by a chemical reaction and is catalyzed by chloroplatinic acid_______________?
Poly vinyl siloxane
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