Dental Materials MCQs
Dental Materials MCQs cover properties, manipulation, and clinical use of dental amalgam, composites, glass ionomers, impression materials, and adhesives, helping BDS and MDCAT students prepare effectively for exams and dental practice knowledge.
Q: High-copper amalgam is preferred because
A) Sets faster
B) Reduces corrosion
C) Has a smoother surface
D) Releases fluoride
✅ Correct Answer: B
Explanation: High-copper amalgam forms less gamma-2 phase, improving corrosion resistance.
Q: The purpose of using a silane coupling agent in composites
A) Reduces viscosity
B) Acts as a solvent
C) Improves bond between filler and resin
D) Enhances esthetics
✅ Correct Answer: C
Explanation: Silane helps chemically bond the inorganic filler to the resin matrix.
Q: Zinc phosphate cement is known to be
A) Highly biocompatible
B) Acidic on mixing
C) Light cured
D) Antibacterial
✅ Correct Answer: B
Explanation: Zinc phosphate has an initially low pH, which may irritate the pulp.
Q: Setting reaction of gypsum involves
A) Acid-base reaction
B) Polymerization
C) Hydration
D) Gelation
✅ Correct Answer: C
Explanation: When water is added, gypsum undergoes a hydration reaction to set.
Q: The filler particles in composite resin help to
A) Increase water absorption
B) Initiate curing
C) Decrease strength
D) Improve wear resistance
✅ Correct Answer: D
Explanation: Filler particles strengthen the composite and reduce wear during function.