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: Alginate impression material is classified as
A) Plastic
B) Elastic
C) Rigid
D) Inert
✅ Correct Answer: B
Explanation: Alginate is an elastic impression material used for preliminary impressions.
Q: Amalgam restoration mainly consists of
A) Copper and mercury
B) Gold and copper
C) Silver and zinc
D) Silver and mercury
✅ Correct Answer: D
Explanation: Dental amalgam primarily contains silver and mercury.
Q: Zinc oxide eugenol is commonly used as
A) Base material
B) Etching agent
C) Permanent cement
D) Final restoration
✅ Correct Answer: A
Explanation: Zinc oxide eugenol is a soothing base and temporary filling material.
Q: Fluoride release is highest in
A) Composite
B) Amalgam
C) Zinc phosphate
D) Glass ionomer
✅ Correct Answer: D
Explanation: Glass ionomer cements release fluoride over time.
Q: The setting reaction of GIC involves
A) Acid-base reaction
B) Oxidation
C) Crystallization
D) Polymerization
✅ Correct Answer: A
Explanation: GIC sets via an acid-base reaction between polyacrylic acid and glass particles.
Q: Calcium hydroxide is used for
A) Pulp capping
B) Etching enamel
C) Root canal filling
D) Final restoration
✅ Correct Answer: A
Explanation: Calcium hydroxide promotes dentin formation and protects the pulp.
Q: The main component of dental porcelain is
A) Quartz
B) Silica
C) Feldspar
D) Kaolin
✅ Correct Answer: C
Explanation: Feldspar is the major ingredient in dental porcelain for strength and translucency.
Q: Polyether impression material is known for
A) Brittle nature
B) Poor accuracy
C) Low stiffness
D) Dimensional stability
✅ Correct Answer: D
Explanation: Polyether offers high accuracy and excellent dimensional stability.
Q: Resin composites are cured using
A) Mercury vapor
B) Air drying
C) Light curing unit
D) Heat
✅ Correct Answer: C
Explanation: Light-curing units activate polymerization in resin composites.
Q: Abrasive used in polishing amalgam is
A) Pumice
B) Sodium fluoride
C) Zinc oxide
D) Eugenol
✅ Correct Answer: A
Explanation: Pumice is commonly used for polishing amalgam restorations.