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: Calcium hydroxide is commonly used for
A) Pit and fissure sealing
B) Pulp capping
C) Etching enamel
D) Orthodontic bonding
✅ Correct Answer: B
Explanation: Calcium hydroxide promotes reparative dentin formation, making it ideal for pulp capping.
Q: A major disadvantage of polyether impression material
A) Stiffness after setting
B) Short working time
C) Hydrophobic nature
D) High flexibility
✅ Correct Answer: A
Explanation: Polyether becomes rigid once set, making it difficult to remove in undercut areas.
Q: Resin-modified glass ionomer differs from traditional GIC due to
A) Polymerizable resin component
B) Addition of metal
C) Lack of fluoride
D) Presence of zinc
✅ Correct Answer: A
Explanation: The resin component allows light-curing and improved mechanical properties.
Q: Delayed expansion in zinc-containing amalgams occurs due to
A) Polymerization shrinkage
B) Corrosion
C) Moisture contamination
D) Incomplete mixing
✅ Correct Answer: C
Explanation: Moisture contamination during trituration can lead to delayed expansion in zinc amalgams.
Q: Abrasiveness of a dental material is measured by
A) Solubility index
B) Optical density
C) Hardness number
D) Tensile strength
✅ Correct Answer: C
Explanation: Hardness determines the material's ability to resist surface deformation and abrasion.