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: To prevent microleakage, dental sealants should be placed under dry conditions using rubber dam isolation
A) Rubber dam
B) Moist cotton
C) Heat drying
D) Wet field
Q: When using a glass ionomer liner, it should be placed in a thin layer and light-cured if resin-modified to achieve optimal bonding
A) Light-cured thin layer
B) Thick layer applied
C) Bulk filled
D) No curing needed
Q: Fracture toughness of a dental material refers to its ability to resist crack propagation under stress
A) Thermal resistance
B) Color change
C) Crack resistance
D) Compressive stress
Q: Resin composites should be added in increments of 2 mm or less to avoid polymerization shrinkage stress
A) Post-curing
B) Incremental layering
C) Single fill
D) Bulk placement
Q: The coefficient of thermal expansion in dental materials must closely match natural teeth to avoid marginal gaps
A) Hardness
B) Match enamel
C) Low cost
D) Improve color
Q: In endodontic procedures, gutta-percha is the most commonly used material for obturating the root canal space
A) Composite
B) MTA
C) Zinc phosphate
D) Gutta-percha
Q: During casting, shrinkage of molten metal is compensated by using a properly calculated sprue and reservoir system
A) Surface porosity
B) Overcooling
C) Sprue system
D) Underheating
Q: The use of calcium hydroxide liners beneath deep restorations stimulates the formation of reparative dentin
A) Causes sensitivity
B) Weakens enamel
C) Enhances bonding
D) Stimulates dentin
Q: Gypsum products stored in open air tend to absorb moisture from the environment, resulting in slower and weaker setting
A) Water loss
B) Faster set
C) Stronger crystals
D) Moisture contamination