Chapter 46

Question 1

Agar

Answer 1

gelatin-type material derived from seaweed used as a thickener

Question 2

Alginate

Answer 2

Irreversible hydrocolloid material used for taking preliminary impressions

Question 3

Base

Answer 3

the foundation or the basic ingredient of a material

Question 4

Border molding

Answer 4

finger pressure to contour the margins of an impression while still in the mouth

Question 5

Catalyst

Answer 5

substance that modifies or increases the rate of a chemical reaction

Question 6

Centric

Answer 6

having an object centered

Question 7

Colloid

Answer 7

suspension of particles in a dispersion medium such as water . Two phases sol and gel

Question 8

Digital Impression

Answer 8

Intraoral scan of a patients dentition and gingiva

Question 9

Elastomeric

Answer 9

Material having elastic properties from rubber

Question 10

Hydro

Answer 10

water

Question 11

Hysteresis

Answer 11

Change in temp. that causes the reversible hydrocolloid material to transform from one physical state to another

Question 12

Imbibition

Answer 12

absorption of water , causing an object to swell

Question 13

Occlusal registration

Answer 13

reproduction of a patient’s bite with the use of wax or elastomeric material

Question 14

Syneresis

Answer 14

loss of water, causing shrinkage

Question 15

Tempering

Answer 15

Bringing a material to a desired consistency

Question 16

Viscous, Viscosity

Answer 16

Physical property of a fluid related to resistance to flow