Chapter 14: Vocabulary Flashcards Preview

Review: Dental Materials > Chapter 14: Vocabulary > Flashcards

Flashcards in Chapter 14: Vocabulary Deck (23):
1

positive replicas of the teeth produced from impressions that create a negative representation of the teeth; commonly called study models and used for diagnostic purposes and numerous chairside and laboratory procedures

Diagnostic Casts

2

an impression of the occlusal relationship of opposing teeth in centric occlusion (patient's normal bite)

Bite Registration

3

glue-like material composed of two or more substances in which one substance does not go into solution but is suspended within another substance; it has at least two phases, a liquid phase called a sol and a semisolid phase called a gel

Colloid

4

a water-based colloid used as an elastic impression material

Hydrocolloid

5

an agar impression material that can be heated to change a gel into a fluid sol state that can flow around the teeth, then cooled to gel again to make an impression of the shapes of the oral structures

Reversible Hydrocolloid

6

an alginate impression material that is mixed to a sol state and as it sets converts to a gel by a chemical reaction that irreversibly changes its nature

Irreversible Hydrocolloid

7

a powder derived from seaweed that is a major component of reversible hydrocollide

Agar

8

liquid state in which colloidal particles are suspended; by cooling or chemical reaction, it can change into a gel

Sol

9

a semisolid state in which colloidal particles form a framework that traps liquid (e.g., Jell-O)

Gel

10

the property of a material to have two different temperatures for melting and solidifying, unlike water, which has one temperature for both

Hysteresis

11

a characteristic of gels to contract and squeeze out some liquid that then accumulates on the surface

Syneresis

12

a versatile irreversible hydrocolloid that is the most-used impression material in the dental office; it lacks the accuracy and fine surface detail needed for impressions for crown and bridge procedures

Alginate

13

highly accurate elastic impression materials that have qualities similar to rubber; they are used extensively in indirect restorative techniques, such as crown and bridge procedures

Elastomers

14

the act of absorbing moisture

imbibition

15

a chemical that lowers the surface tension of a substance so that it is more readily wet; for example, oil beads on the surface of water, but soap acts as a surfactant to allow the oil to spread over the surface

Surfactant

16

an elastic impression material that has sulfer-containing (mercaptan) functional groups; it has also been referred to as rubber base impression material

Polysulfide

17

a silicone rubber impression material that sets by linking molecules in long chains but produces a liquid by-product by condensation

Condensation Silicone

18

a silicone rubber impression that also sets by linking molecules in long chains but produces no by-product; the most commonly used addition silicones are the polyvinyl siloxanes

Addition Silicone

19

very accurate addition silicone elastomer impression material; it is used extensively for crown and bridge procedures because of its accuracy, dimensional stability, and ease of use

Polyvinyl Siloxane (PVS)

20

a rubber impression material with ether functional groups; it has high accuracy and is popular for crown and bridge procedures

Polyether

21

a compression material composed of resin and wax with fillers added to make it stronger and more stable than wax

Impression Compound

22

an impression material composed of a gypsum product similar to plaster of Paris

Impression Plaster

23

a hard and brittle impression material used in complete dental procedures

Zinc Oxide Eugenol (ZOE)