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: Etching enamel improves
A) Caries resistance
B) Bond strength
C) Salivary flow
D) Surface shine
✅ Correct Answer: B
Explanation: Etching increases surface roughness, enhancing adhesive bonding.
Q: Polymerization shrinkage in composite leads to
A) Strength increase
B) Marginal gap
C) Thermal resistance
D) Antibacterial effect
✅ Correct Answer: B
Explanation: Shrinkage during curing may cause marginal gaps in restorations.
Q: An impression tray should provide
A) Minimum retention
B) High salivation
C) Poor fit
D) Maximum support
✅ Correct Answer: D
Explanation: A well-fitting tray provides uniform support and prevents distortion.
Q: Type IV gypsum is ideal for
A) Study models
B) Temporary crowns
C) Alginate impressions
D) Die fabrication
✅ Correct Answer: D
Explanation: Type IV stone has high strength and low expansion, perfect for dies.
Q: Zinc phosphate cement is mixed on
A) Plastic sheet
B) Cotton roll
C) Glass slab
D) Wooden spatula
✅ Correct Answer: C
Explanation: A glass slab helps control the exothermic reaction during mixing.