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.Management Sciences
Category: Dental Materials
In processing methyl methacrylate, the resin may show porosity if the flask is placed too soon porosity most likely occur_____________?
A. Throughout the denture
B. Near the borders
C. In the thickest part
D. On the denture surface
The impression with the least dimensional change upon disinfection is_______________?
A. Addition poly silicone
B. Agar-agar
C. Polysulphide
D. Polyether
The impression materials with lowest viscosity is_____________?
A. Plaster of paris
B. Agar – agar
C. Zinc oxide eugenol
D. Elastomers
The yield strength of AUstenite (NiTi alloy) is______________?
A. 100 Mpa
B. 240 Mpa
C. 560 Mpa
D. 700 Mpa
The principle application of zinc phosphate cement is_____________?
A. In final cementation
B. As temporary cementation
C. As a temporary filling material
D. It has less occlusal wear
Adequate mixing of mercury is indicated by_______________?
A. Dry Mix
B. Shiny Mix
C. Short Mixing Time
D. None of the above
Best material for duplicating cast is_______________?
A. Agar-agar
B. Alginate
C. Zinc oxide eugenol
D. Plaster of paris
Rough and irregular surface produced on the impression is because of_______________?
A. Air incorporated during mixing
B. Improper application of pressure during impression making
C. Presence of excessive saliva in impression area
D. Due to improper ratio of polymer and monomer
The commonly used laser for curing composite resin is______________?
A. Nd:YAG
B. CO2
C. ER:YAG
D. Argon
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. Too rapid polymerization
D. Presence of moisture in impression area
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