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Medical Science Mcqs 5254 MCQs [All-Courses]

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Medical Science is the study of human health, diseases, prevention, and treatment, focusing on diagnosis, patient care, and medical research to improve healthcare outcomes.

All Topics  5254

Polymerisation of heat-cured methyl methacrylate is initiated by______________?
A Tertiary amine
B Benzoyl peroxide free radical
C Hydroquinone
D Methyl ether
Correct Answer: Benzoyl peroxide free radical
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
Correct Answer: In the thickest part
Composite resins in comparison to acrylic have_______________?
A Low compressive strength
B High abrasive resistance
C High water absorption
D High polymerization shrinkage
Correct Answer: High abrasive resistance
The chemical used to etch enamel is_______________?
A Zinc oxide
B Methyl methacrylate
C Phosphoric acid
D Eugenol
Correct Answer: Phosphoric acid
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
Correct Answer: Addition of difunctional monomers
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
Correct Answer: Should be held at a millimeter distance from the restoration
In self-cure acrylic resin, activator is_____________?
A Toluidine
B Quaternary ammonium compound
C Benzoyl peroxide
D Tertiary amine
Correct Answer: Tertiary amine
Marginal leakage related to temperature change occurs to the greatest extent with_______________?
A Amalgam alloy
B Unfilled resin
C Composite resin
D Direct filling gold
Correct Answer: Unfilled resin
Acrylic resins were first introduced as a denture base material in______________?
A 1925
B 1937
C 1951
D 1956
Correct Answer: 1937
What is the disadvantage of using composites as restorative material ?
A Increased thermal conductivity
B Decreased wear resistance
C Decreased thermal conductivity
D None of the above
Correct Answer: Decreased wear resistance
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