A. Reduced dimensional instability
B. Improved adhesion of the impression to the tray
C. Minimal permanent deformation
D. Reduced contamination by saliva
Related Mcqs:
- The process of changing the rubber base product or liquid polymer, to a rubber like material is generally known as_____________?
A. Boiling
B. Condensation
C. Vulconization
D. Chain lengthening - The cross linking agent of polysulphide rubber base impression material is______________?
A. Aromatic sulfonate esters
B. Stannous octate
C. Platinum salt catalyst
D. Lead dioxide - 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 - Which of the following impression materials is easy to pour and difficult to remove the stone cast from the impression ?
A. Addition polysilicone
B. Condensation polysilicone
C. Polyether
D. Polysulfide - Best impression material to be used for securing impression after crown preparation_______________?
A. Alginate
B. Agar
C. Elastome
D. Zno paste - 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 - In primates; a tooth with single conical cusp and single root is seen in________________?
A. Haplodont
B. Heterodont
C. Acrodont
D. Thecodont - Which of the following diseases of the bone characteristically exhibits (in contrast to the other three conditions) a single lesion in a single bone ?
A. Central giant cell granuloma
B. Osteopetrosis
C. Paget’s disease of the bone
D. Polyostotic fibrous dysplasia - Rubber base impressions are poured immediately as they_______________?
A. Continue to polymerize
B. Become elastic
C. Show imbibition and syneresis
D. Show gelation - The rapid decrease in tensile strength and increase in ductility of a wrought metal is seen in which stage of annealing ?
A. Recovery stage
B. Recrystallisation stage
C. Grain growth stage
D. All of the above
