12 Questions
What is the purpose of an impression material?
To record the form and dimensions of oral tissues
Which of the following is not a desirable quality of impression materials?
Affected by oral fluids
What is one of the factors affecting the accuracy of impression materials during setting?
High dimensional changes during setting
Why is it important for impression materials to be elastic on removal from the mouth?
To record undercuts without distortion of the impression
Which quality is not necessary for an impression material?
Affected by oral fluids
What is the purpose of pouring a suitable model or die material into a set impression?
To obtain a positive reproduction of oral tissues
What property of impression materials should be compatible with gypsum products?
They should not need a separating medium when poured
How are impression materials classified based on their manner of hardening?
Both a and b
What type of impression material is used when there is no undercut present?
Non-elastic impression materials
Which of the following is a characteristic of elastic impression materials?
They can be used when undercut exists
Which of the following impression materials harden by chemical reaction?
Plaster of Paris, Zinc oxide eugenol impression pastes, alginates, rubber impression materials
What is the primary difference between condensation and addition silicone impression materials?
Condensation silicones harden by chemical reaction, while addition silicones soften and harden by thermal changes
Explore the process of using impression materials in dentistry to record the form and dimensions of oral tissues. Learn about the qualities of impression materials and how they are used to create positive reproductions of dental arches.
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