Updated Impression Materials ( Dental Materials ) MCQs – New Medical MCQs
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Latest Medical MCQs
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Latest Impression Materials ( Dental Materials ) Mcqs
The most occurred mcqs of Impression Materials ( Dental Materials ) in past papers. Past papers of Impression Materials ( Dental Materials ) Mcqs. Past papers of Impression Materials ( Dental Materials ) Mcqs . Mcqs are the necessary part of any competitive / job related exams. The Mcqs having specific numbers in any written test. It is therefore everyone have to learn / remember the related Impression Materials ( Dental Materials ) Mcqs. The Important series of Impression Materials ( Dental Materials ) Mcqs are given below:
4th state of matter is______________?
A. Liquid
B. Solid
C. Gas
D. Colloid
All of the following statements about an alginate impression are EXCEPT________________?
A. It will take up water and expand if kept wet
B. It may exhibit fluid exudates on the surface as a result of imbibition of water
C. It should be rapidly displaced from the mouth
D. It will shrink as a result of syneresis
Type I and Type II zinc oxide impression paste differ with respect to_______________?
A. Water content
B. Their hardness after setting
C. Their use
D. Eugenol content
The term given to the phenomenon of moisture absorption by an alginate impression in________________?
A. Imbibition
B. Hysteresis
C. Syneresis
D. Gelation
The impression with the least dimensional change upon disinfection is_______________?
A. Addition poly silicone
B. Polysulphide
C. Agar-agar
D. Polyether
Palladium is added to polyvinyl siloxane to_____________?
A. Act as a scavenger
B. Acts as plasticizer
C. Helps as surfactant
D. Acts as a catalyst
Immediate pouring of impressions is most critical in_____________?
A. Condensation polysillicon
B. Polyether
C. Addition Polysilicon
D. A and B
The impression material used to record the prepared areas on abutment teeth is______________?
A. Medium viscosity elastomeric impression material
B. High viscosity elastomeric impression material
C. Low viscosity elastomeric impression material
D. None of the above
Alginate impression material is________________?
A. Thermoplastic impression material
B. Non-elastic impression material
C. More mucostatic than ZOE
D. Less mucostatic than ZOE
Syringe material is______________?
A. Medium viscosity elastomer
B. High viscosity elastomer
C. Medium & low viscosity elastomer
D. Low viscosity elastomer
The impression for a diagnostic cast of a partial edentulous mouth should be taken in_______________?
A. Modelling compound
B. Impression wax
C. Hydro-colloid
D. Hydro cal
Agar impression materials differ from alginate impression materials in that the former sets by_______________?
A. Evolution
B. Physical change
C. Mechanical action of saliva
D. Chemical change
Which material undergoes hysteresis ?
A. Impression plaster
B. Reversible hydrocolloid
C. Irreversible hydrocolloid
D. Metallic oxide paste
The setting time of irreversible hydrocolloids can be decreased by_____________?
A. Raising the temperature of water used for maxing
B. Lowering the temperature of water used for mixing
C. Using excess water for maxing
D. None of the above
Rubber base impressions are poured immediately as they_______________?
A. Continue to polymerize
B. Show imbibition and syneresis
C. Become elastic
D. Show gelation
Restorative Resins MCQs
The most mucostatic impression material is_______________?
A. Thin mix of plaster of paris
B. Free flowing wax
C. Zinc oxide eugenol impression paste
D. Reversible hydrocolloids
The best way to remove a hydrocolloid impression from the patient’s mouth is____________?
A. Wetting the periphery of the impression with moist cotton to break the peripheral seal
B. Slight rocking of the impression to disengage it from the undercut
C. Sudden jerking of the impression to prevent tearing
D. Supporting the impression along with the tray to prevent disengaging of the tray alone
Palatal secretions affect the setting of all the impression materials except_______________?
A. Impression paste
B. Agar-agar
C. Silicone
D. Impression plaster
Lenolin is added is ZOE paste to______________?
A. Accelerate reaction
B. Increase flow
C. Decrease flow
D. Decrease irritation due to eugenol
Agar is prepared from_______________________?
A. Chemicals
B. Bullock heart
C. Sea weed
D. Chick cells
Perforated impression tray are used for_______________?
A. Alginate
B. Agar-agar
C. Zinc oxide-eugenol
D. Impression compound
During setting of alginate impression materials________________?
A. Colloidal changes to sol
B. Trisodium phosphate reacts with calcium sulphate
C. Trisodium phosphate reacts with sodium alginate
D. Material in contact with soft tissues sets last
K2SO4 in agar-agar is for_______________?
A. Accelerating the setting stage of gypsum
B. Give dimensional stability
C. Increase strength
D. None of the above
Wash or corrective impression is done by______________?
A. Alginate
B. Impression paste
C. Impression plaster
D. Rubber base impression material
The plasticizers used in polyether impression material is_______________?
A. Colloidal silica
B. polyether polymer
C. Glycol ether
D. Di-vinyl poly (dimethyl siloxane)
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 potassium sulphate
B. Percentage composition by weight of water
C. Concentration of filler and plasticizer
D. Temperature
Alginates are_____________?
A. Gel
B. Sol
C. Hydrocolloid
D. Colloid
Syneresis is associated with______________?
A. Hydrocolloids
B. Zinc oxide eugenol
C. Elastomers
D. Plaster of paris
The advantage of ZOE impression paste_______________?
A. Has dimensional stability
B. Is easy manipulation
C. Does not adhere to tissues
D. Does not require special trays
Rinsing of the impression is important to________________?
A. Hydrate the impression
B. Remove saliva
C. Remove excess impression material
D. Accelerate the setting
Which is best material for RPD impression_______________?
A. Reversible hydroollioid
B. Irreversible hydrocolloid
C. Impression plaster
D. None of the above
Which of the following is not affected by saliva ?
A. Impression paste
B. Impression plaster
C. Silicon impression material
D. None of the above
Retarder in Zinc oxide eugenol is______________?
A. Zinc acetate
B. CaCl2
C. Alcohol
D. Glycerine
The cross linking agent of polysulphide rubber base impression material is______________?
A. Stannous octate
B. Aromatic sulfonate esters
C. Platinum salt catalyst
D. Lead dioxide
When making a polysulphide impression for a caste crown, custom trays are usually preferred over stock trays for all of the following reasons except_______________?
A. Custom trays require less impression material
B. Custom trays facilitate uniform contraction of impression material
C. Stock trays may be short in the flange area
D. Impressions made n the custom trays are easier to remove from the mouth
Name the accelerator used in Zinc oxide eugenol paste______________?
A. Linseed oil
B. Olive oil
C. Zinc acetate
D. All of these
Linear contraction of elostomeric impression with passage of time is highest in______________?
A. Polysulphide
B. Addition silicone
C. Polyetner
D. Condensation silicone
Which of the following is true about Agar hydrocolloid impression material ?
A. Liquefies between 71 – 100°C
B. Facilitates fabrication of metal dyes
C. Solidfies between 50 – 70°C
D. Cannot register fine surface details
Which one of the following increase the strength and reduce viscosity of agar hydrocolloid impression material_____________?
A. Borax
B. Sulfates
C. Water
D. Carbonates
The water powder ratio of alginate is______________?
A. 40 ml of water to 40 gms of powder
B. 100 ml of water to 60 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_______________?
A. Agar
B. Alginate
C. Elastome
D. Zno paste
Amalgams MCQs
Which of the following is correct glass transition temperature of Impression compound ?
A. 65°C
B. 39°C
C. 43.5°C
D. 100°C
Rough and irregular surface produced on the impression is because of_______________?
A. Improper application of pressure during impression making
B. Air incorporated during mixing
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___________________?
A. 8%
B. 6%
C. 4%
D. 10%
Polysulfide material is routinely not recommended because of_______________?
A. Unpleasant odor and taste
B. Least permanent deformation
C. Low accuracy
D. Highest curing shrinkage
Hydrocolloid material, show all except______________?
A. Imbibition
B. Hysterisis
C. Recrytallisation
D. Syneresis
Impression material that Do NOT harden by chemical reaction_______________?
A. Alginate
B. Impression compound
C. Zinc oxide eugenol
D. Plaster of paris
Putty wash technique_________________?
A. Light body first and putty later
B. Putty used first and light body used second
C. Light body and putty used at the same time
D. None of the above
What is the minimum thickness of the elastomeric impression material for an accurate impression_______________?
A. 2-4 mm
B. 2 mm
C. Greater than 3 mm
D. Maximum in the area of operation
The relative hardness of elastomere is determined using________________?
A. Barcol indenter
B. Rockwell tester
C. Knoop pyramid
D. Shore durometer
Rough surface of elastomeric impression results from_______________?
A. Air bubbles
B. Inadequate mixing
C. Too rapid polymerization
D. Incomplete polymerization caused by premature removal from mouth
Most rigid elastomer is___________________?
A. Polyether
B. Addition silicone
C. Polysulphide
D. Condensation silicone
Most ideally elastic among the following_______________?
A. Polysulphide
B. Addition silicone
C. Polyether
D. Condensation silicone
Which one of the following impression materials is elastic, sets by a chemical reaction and is catalyzed by chloroplatinic acid_______________?
A. Polyether
B. Condensation silicone
C. Polysulfide
D. Poly vinyl siloxane
Which of the following best describes the working time of elastomeric impression material ?
A. Loss of luster of impression material
B. Just after the start of appearing elastic properties of impression material
C. Just before the start of appearing elastic properties of impression material
D. After the start of appearing elastic properties of impression material
Final product in alginate is________________?
A. Potassium alginate
B. Sodium alginate
C. Trisodium phosphate
D. Calcium alginate
Dustless alginate is produced by______________?
A. Reducing the diatomaceous earth
B. Altering the matrix
C. Coating with dihydric alcohol
D. Adding heavy metal salts
Two in one stage impression materials include______________?
A. Hydrocolloid impression material
B. Zinc Oxide eugenol impression paste
C. Elastomeric impression material
D. All of the above
A technique of combining reversible and irreversible hydrocolloid that could bond to irreversible hydrocolloid is known as________________?
A. Immersion technique
B. Laminate technique
C. Injecting technique
D. Tempering technique
Which of the following impression materials is easy to pour and difficult to remove the stone cast from the impression ?
A. Condensation polysilicone
B. Addition polysilicone
C. Polyether
D. Polysulfide