Non-Elastic Impression Materials

Question 1

Name 3 Non-Elastic Impression Materials

Answer 1

• Impression Plaster
• Impression Compound
• Zinc Oxide Eugenol

Question 2

What patients can you use Non-Elastic Impression Materials in?

Answer 2

All used in edentulous cases

Question 3

List some properties of impression plaster (4)

Answer 3

• Mucostatic impression material
• No trays required
• Material sets hard
• Only used in edentulous cases

Question 4

List some properties of impression compound (5)

Answer 4

• Poor thermal conductivity/flow properties
• It will not reproduce undercut areas
• Occasionally used as first impressions for edentulous cases
• High viscosity
• Mucocompressive impression material

Question 5

List some properties of ZOE impression pastes (4)

Answer 5

• Brittle material when set – bits can fracture off
• Accurate in thin section
• Initial low viscosity and pseudoplasticity
• Mucostatic impression material

Question 6

What does Mucostatic impression material mean?

Answer 6

Does not displace soft tissue

Question 7

What does Mucocompressive impression material mean?

Answer 7

Displaces buccal and lingual soft tissue