Dental Materials MCQs
Dental Materials MCQs test the understanding of restorative and preventive materials used in dentistry. Topics include dental amalgam, composite resins, glass ionomers, impression materials, and adhesives. These MCQs are valuable for BDS and MDCAT students aiming to grasp the properties, manipulation, and clinical use of dental materials.
Q: Addition silicones are also called
A) Polyvinyl siloxanes
B) Condensation silicones
C) Reversible hydrocolloids
D) Polyethers
✅ Correct Answer: A
Explanation: Polyvinyl siloxanes are high-accuracy addition silicones.
Q: Elastomeric impression materials include
A) Agar and alginate
B) Amalgam and composite
C) Polyether and silicone
D) Wax and ZOE
✅ Correct Answer: C
Explanation: Elastomeric materials like polyether and silicone provide elastic recovery.
Q: Reversible hydrocolloid is represented by
A) Composite
B) Alginate
C) GIC
D) Agar
✅ Correct Answer: D
Explanation: Agar changes from sol to gel and back with temperature changes.
Q: Tissue conditioners are used for
A) Permanent relining
B) Temporary soft liners
C) Final restorations
D) Surgical impressions
✅ Correct Answer: B
Explanation: Tissue conditioners are soft liners used for temporary relief in dentures.
Q: Color stability is highest in
A) Porcelain
B) GIC
C) Composite
D) Amalgam
✅ Correct Answer: A
Explanation: Porcelain has excellent color stability and esthetic appearance.
Q: Gold is classified as
A) Brittle
B) Ductile
C) Fragile
D) Hard
✅ Correct Answer: B
Explanation: Gold is highly ductile, making it suitable for restorations.
Q: Dental stone is used for
A) Restorations
B) Root canals
C) Impressions
D) Model fabrication
✅ Correct Answer: D
Explanation: Dental stone is ideal for making precise models and dies.
Q: Acid etching improves
A) Smoothness
B) Retention
C) Polishing
D) Staining
✅ Correct Answer: B
Explanation: Etching enhances micromechanical retention for adhesives.
Q: Orthodontic brackets are commonly bonded using
A) GIC
B) Composite resin
C) Zinc oxide
D) Amalgam
✅ Correct Answer: B
Explanation: Composite resins offer strong and reliable bonding for orthodontic appliances.
Q: Polycarboxylate cement adheres chemically to
A) Ceramic
B) Metal
C) Enamel
D) Dentin
✅ Correct Answer: D
Explanation: Polycarboxylate cement forms ionic bonds with calcium in dentin.