Quiz on Properties of Dental Materials and Gypsum

What is the primary purpose of restorative dental materials?

• To fabricate dentures

• To replace and repair tooth structure

• To prevent demineralization

• To enhance esthetics

Which type of restoration is placed directly on the tooth?

• Auxiliary restoration

• Indirect restoration

• Direct restoration

• Prosthetic restoration

What is the hardest and most mineralized substance in the body?

• Periodontium

• Dentin

• Enamel

• Pulp

Which type of gypsum is used for making study models?

• Type IV: Dental Stone, High Strength

• Type I: Impression Plaster

• Type II: Model Plaster

• Type III: Dental Stone

What is the main function of the pulp in a tooth?

• Provide sensation

• Facilitate mastication

• Support tooth structure

• Protect against caries

What is the primary component of dentin?

• 100% Collagen

• 50% Water

• 70% Hydroxyapatite

• 90% Mineral

What is the setting time for gypsum materials?

• 1-2 minutes

• 8-16 minutes

• 30-45 minutes

• 1-2 hours

Which type of dentin is formed in response to trauma?

• Secondary dentin

• Tertiary dentin

• Primary dentin

• Physiologic dentin

What is the effect of increasing the water-to-powder ratio in gypsum?

• Decreases accuracy

• Decreases setting time

• Increases strength

• Increases working time

What is the primary function of the periodontium?

• Support the tooth

• Protect against caries

• Facilitate mastication

• Provide sensation