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Flashcards in Dental Materials Deck (50):
1

chemical attraction between unlike molecules

adhesion

2

chemical attraction between like molecules

cohesion

3

index which indicates how one material reacts to temperature extremes in relation to another

Coefficient of thermal expansion

4

force at which a material breaks under pressure

compressive strength

5

slow dimensional change caused by compression

creep

6

ability to undergo change of form without breaking

ductility

7

materials ability to recover its initial shape after undergoing force

elasticity

8

electrical current generated by dissimilar metals in an acidic environment

galvanism

9

process of gelling (solidification by cold)

gelation

10

volumetric weight of one cubic cm or mm of water

gram

11

absorption of a solvent by a gel

imbibition

12

materials capacity to be shaped by force or pressure

malleability

13

linking, branching, or cross linking of smaller molecules

polymerization

14

force at which material cannot return to its original shape

proportional limit

15

contraction of a gel due to loss of a solvent

syneresis

16

force need to stretch material to point of fracture

tensile strength

17

resistance to flow

viscosity

18

change a materials components its properties change

truism

19

Mat - an alloy of mercury with silver, copper, tin and zinc

amalgam

20

Mat - added to amalgam to minimize corrosion (gamma 2 phase eliminated)

copper

21

polish - amalgam and gold

tin oxide

22

polish - for composites

diamond

23

used to SEAL dentin to MEDICATE dental pulp

liners

24

liner that stimulates reparative dentin formation

calcium hydroxide

25

used to provide thermal INSULATION or mechanical PROTECTION for dental pulp

bases

26

cement - exothermic reaction on mixing

zinc

27

cement - binds to dentin, thermal expansion, class V restorations

glass ionomer

28

cement - temporary, orange solvent used to clean contaminated instruments

ZOE - zinc oxide eugenol

29

types of impression materials (2)

rigid - inelastic
flexible - elastomeric (aqueous/non-aqueous)

30

Mat - flexible, aqueous, undergoes physical reaction; temp dependent

Hydrocolloid (agar)

31

Mat - flexible, aqueous, undergoes chemical reaction; Not temp dependent- but temp speeds or slows setting, need for fluff

Irreversible Hydrocolloid (alginate)

32

Mat - flexible, non-aqueous, unstable in presence of moisture

polyether rubber

33

Mat - flexible, non-aqueous, addition reaction silicone

vinylpolysiloxane

34

Mat - primarily made of paraffin, used to modify the shape of impression tray and cushion braces

Utility wax

35

Leading cause of implant failure

mobility - due to inadequate bone, lack of osseointegration, peri-implantitis

36

Active ingredient in Tartar control toothpaste; leading cause of dentinal hypersensitivity

pyrophosphate

37

Active ingredient in Gum care toothpaste; antimicrobial agent

triclosan

38

Active ingredient in Desensitization toothpastes (3)

potassium nitrate, sodium citrate, strontium chloride

39

Highly effective Desensitizers professionally placed (2)

potassium oxalate, fluoride varnish

40

Active ingredient in Vital bleaches (home bleach) (2)

carbamide peroxide, hydrogen peroxide

41

GV Black Class 1

pits and fissures

42

GV Black Class 2

posterior proximals

43

GV Black Class 3

anterior proximals

44

GV Black Class 4

anterior proximals including incisal edge

45

GV Black Class 5

facial or lingual cervical third

46

GV Black Class 6

cusp tips and incisal edges

47

Mat - added to non-metal restorative materials to appear radiopaque in X-rays (2); if not added X-ray will appear radiolucent and look like decay

barium, strontium

48

amount of time used to etch

20 seconds

49

time before stone cast is removed from an alginate impression

30-60 minutes

50

Brinell and Knoop test used to determine

hardness