Medical MCQs

5099 MCQs  (Page 53 of 510)

In self-cure acrylic resin, activator is_____________?
A. Toluidine
B. Quaternary ammonium compound
C. Benzoyl peroxide
D. Tertiary amine
For photo-curing the composite resin the light source______________?
A. Should be held at a millimeter distance from the restoration
B. Need no protection while in use
C. Will cure composite upto a depth of 5 millimeter thickness
D. Is fiber optic
Which of the following procedure is indicated to produce cross-linking in the polymerization of linear chains of acrylic_______________?
A. Addition of grain refining agents
B. Addition of difunctional monomers
C. Increasing the amount of heat required for linear polymerization
D. Incorporation of terminating agents
The chemical used to etch enamel is_______________?
A. Zinc oxide
B. Methyl methacrylate
C. Phosphoric acid
D. Eugenol
Insufficient closure of the flasks during packing of denture base resin can result in_____________?
A. Poor colour stability
B. Less polymerization shrinkage
C. Increase in vertical dimension
D. Decrease in vertical dimension
Composite resins in comparison to acrylic have_______________?
A. Low compressive strength
B. High abrasive resistance
C. High water absorption
D. High polymerization shrinkage
Polymerisation of heat-cured methyl methacrylate is initiated by______________?
A. Tertiary amine
B. Benzoyl peroxide free radical
C. Hydroquinone
D. Methyl ether