impression materials

Question 1

function of impression materials

Answer 1

produce an accurate replica of the surface and shape of hard and soft oral tissues

Question 2

what is an impression?

Answer 2

a negative reproduction of tissues

Question 3

classification of impression materials

Answer 3

clinical
- mucostatic
- mucocompressive
properties
- elastic
- non-elastic

Question 4

What is a mucostatic impression material? give an example

Answer 4

fluid materials that displace soft tissue slightly
- gives an impression of the undisplaced mucosa
e.g. low viscosity alginates

Question 5

what is a mucocompresive material? give an example

Answer 5

e.g. impression compound

viscous materials that record an impression of the mucosa under load
- gives impression of displaced soft tissues