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: The most commonly used material for fabrication of custom trays in complete denture procedures is auto-polymerizing acrylic resin
A) Light-cure composite
B) Auto-polymerizing acrylic
C) Thermoplastic sheet
D) Polycarbonate
Q: During the setting of gypsum, the chemical reaction leads to formation of interlocking needle-like crystals of calcium sulfate dihydrate
A) Expansion
B) Crystallization
C) Heat absorption
D) Water loss
Q: The main disadvantage of using amalgam as a restorative material is its unaesthetic metallic appearance
A) Metallic color
B) High cost
C) Unpleasant odor
D) Brittleness
Q: Etching of enamel with phosphoric acid increases surface energy and creates micro-porosities for better bonding
A) Reduces bonding
B) Prevents drying
C) Promotes leakage
D) Enhances retention
Q: In glass ionomer cements, fluoride release helps in the prevention of secondary caries around restorations
A) Reduces bond
B) Increases acidity
C) Prevents caries
D) Weakens cement
Q: The role of silane coupling agent in composite resin materials is to enhance the bond between the resin and the filler particles
A) Increase color
B) Reduce wear
C) Strengthen filler
D) Bond filler to resin
Q: For accurate reproduction of oral tissues, elastomeric impression materials like addition silicone are highly preferred in fixed prosthodontics
A) Addition silicone
B) Plaster
C) Reversible hydrocolloid
D) ZOE
Q: The setting reaction of polycarboxylate cement involves chelation of carboxyl groups with calcium ions in tooth structure
A) Ionic bonding
B) Mechanical retention
C) Hydrogen bonding
D) Covalent bonding
Q: Increased powder-to-liquid ratio in dental cements generally results in higher strength and lower solubility
A) Increases porosity
B) Weakens cement
C) Slows setting
D) Improves strength
Q: Compressive strength of dental materials is particularly important for posterior restorations that endure heavy masticatory forces
A) Compressive resistance
B) Solubility
C) Thermal expansion
D) Aesthetic value