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: Color matching in restorations is influenced by
A) Opacity
B) Hue, value, and chroma
C) Radiopacity
D) Density
✅ Correct Answer: B
Explanation: The key factors are hue, value, and chroma in color perception.
Q: Initial setting time of GIC can be affected by
A) Pressure
B) Etching
C) Light curing
D) Humidity
✅ Correct Answer: D
Explanation: GIC setting is sensitive to ambient humidity.
Q: Tensile failure in brittle materials is due to
A) Temperature
B) Moisture
C) Micro-cracks
D) Plasticity
✅ Correct Answer: C
Explanation: Brittle materials fail under tension due to propagation of micro-cracks.
Q: The most moisture-sensitive impression material is
A) Polyether
B) Silicone
C) Polysulfide
D) Alginate
✅ Correct Answer: A
Explanation: Polyether is hydrophilic but highly sensitive to ambient moisture.
Q: Coefficient of thermal expansion is highest in
A) Enamel
B) Amalgam
C) Porcelain
D) Composite resin
✅ Correct Answer: D
Explanation: Composites expand more with heat compared to natural tooth tissues.