Removable prosthodontic

Question 1

Impression plaster classification

Answer 1

Non elastic

Question 2

Alginate classification

Answer 2

Elastic hydrocolloid irreversible

Question 3

Vinyl polysiloxane classification

Answer 3

Elastic materials synthetic

Question 4

Agar classification

Answer 4

Reversible hydrocolloid

Question 5

Polyether classification

Answer 5

Synthetic elastomers

Question 6

Silicone classification

Answer 6

Synthetic elastomers

Question 7

Polysulphide classification

Answer 7

Synthetic elastomers

Question 8

Impression compound classification

Answer 8

Non elastic materials

Question 9

ZOE pastes

Answer 9

Non elastic materials

Question 10

impression waxes classification

Answer 10

non elastic classification

Question 11

definition of hydrocolloid

Answer 11

substance which forms a gel in the presence of water

Question 12

What is a colloid?

Answer 12

Mixtures in which one or more substances are dispersed as relatively large solid particles or liquid droplets throughout a solid, liquid, or gaseous medium

Question 13

Hydrocolloids in dentistry

Answer 13

Colloidal suspension of polysaccharides in water

Question 14

Describe reversible hydrocolloids

Answer 14

Sol (liquid) form
Gel formation induced by cooling
Bonds easily destroyed by heating
On reheating gel, material reverts to sol

Question 15

Describe irreversible hydrocolloids

Answer 15

Sol (liquid) form
Gel formation does not require cooling
Strong cross links formed
The gel form will not revert to the sol form

Question 16

Constituents of alginate

Answer 16

Sodium alginate
Calcium sulphate -gypsum
Trisodium phosphate
Diatomaceous earth
Flavour
Colour
Chromatic phase indicator

Question 17

Which constituent controls alginate working time

Answer 17

Trisodium phosphate
Competes with sodium alginate for calcium ions that are released when calcium sulfate dissolves
Forming calcium phosphate