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Flashcards in Quiz 6 Deck (75):
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Defined as an alloy

Amalgam

1

An ______ is a combo of two or more metals

Alloy

2

_____ is a metal alloy containing mercury, silver, tin, copper and other elements

Amalgam

3

______ is the only pure metal that is a liquid at room temperature

Mercury

4

______ are elements with good metallic surface and retain their surface in dry air

Noble metals

5

The noble metals are...

Gold, platinum, palladium, iridium, rhodium, osmium and ruthenium

6

An amalgam is mainly use in class ____ and class ____ restorations

Class I and class II

7

Combined metals that are mutually soluble in a molten state

Alloy

8

Old types of amalgam

Lathe cut and spherical

9

Used presently and is a mixture of lathe cut and spherical

Admixed

10

Used to eliminate hand mixing for amalgam restorations

Triturator

11

Complete mixing usually takes ...

5-20 seconds at speeds of 2000-4500 cycles/minute

12

Overtrituration

Slows setting and the mix is shiny and sticky

13

Undertritution

Crumbly mixture and it looks dull

14

Correct trituration

Cohesive and shiny

15

The amalgam mixture is condensable for approx ___ minutes

5

16

For the final amalgam finish you must wait 24 hours to avoid ....

Causing voids in the margins

17

The disposable capsules are to be placed in an I breakable tightly sealed container to reduce...

Contamination of the operatory air

18

Amalgam handling

Avoid carpeting
Work in well ventilated area
Do not heat amalgam
Spill kit
Use light spray and suction when grinding (aerosols)

19

Dimensional changes

Shrinkage, creep, moisture, contamination, corrosion

20

Another dimensional change that can affect the margins, slow professing, permanent deformation that is a result of a steady force or stress acting on the material

Creep

21

Moisture contamination during the placement of the material Amy cause delayed expansion, weaker restoration and other issues

Moisture contamination

22

Causes material to have microscopic pores that fill with corrosive product which will weaken the material, causing it to look darker- why polishing is important

Corrosion

23

Major causes for amalgam failure

Secondary decay, marginal breakdown, fracture and cusp fracture

24

Help to seal dentin tubules, helps tooth be more resistant to fractures and less marginal breakdown

Adhesives

25

Adhesive uses

Amalgam, fissure sealing, base under composite, less shrinkage

26

Alternative composite names

Ceromer and poly glass ; mid fill and mini fill

27

Drawbacks of gold fillings

Very high thermal conductibility, difficult to place, danger to pulp

28

This hammering of the material will cause it to set in a harder state so it may be used for a restoration is called

Strain hardening

29

Cover portion of the occlusal and proximal surfaces

Inlays

30

Covers proximal surfaces and most of the occlusal surface

Onlays

31

Covers the full tooth

Crown

32

A few teeth connected

Bridges

33

Covers the front portion of a tooth

Veneers

34

Tooth colored restorations

Composites

35

Uses for composite glass ionomers and composites

Anterior teeth
Class III restorations
Class IV
Class V

36

Cavities in pit and fissure

Class I

37

Caries in proximal surfaces in premolars and molars

Class II

38

Caries in proximal surfaces that do not involve the incisal edge

Class III

39

Caries in proximal surfaces of incisors or canines that involve incisal edge

Class IV

40

Caries in the cervical 1/3 of facial or lingual surfaces (not pit fissures)

Class V

41

Caries on the incisal edge of anterior teeth and cusp tips of posterior teeth

Class VI

42

Composition composites are made of two different classes of materials

Polymers (resins) and glass particles (fillers)

43

Has an ideal combination of esthetics and durability in a dental composite

Hybrids

44

Hybrids are stored in the

Refrigerator
Manufacturers put inhibitor molecule in each paste to delay the polymerization which will provide ample working time

45

Mylar strips are used to

Keep oxygen away
Helps produce a mouth regularly shaped contoured surface ( decreases the finishing procedure of the restoration

46

Is greatest when the polymerization is happening at a faster rate, this will put the material away from the tooth

Shrinkage

47

The approx curing time for composites are ____ seconds and for larger restorations _____ seconds

40, 60

48

Bonds together a material and the tooth

Luting cement

49

Used as a liner or base

Glass ionomers

50

Any material that replaced or restores a missing part of the tooth

Restorative materials

51

Glass ionomers refers to a mixture of a

Glass reinforced agent and a polymer

52

Combo of composites and ionomers

Compomers (good success in anterior teeth)

53

Used as pit and fissure sealants

Enamel

54

It is hard to etch and bond to the dentin surface

Dentin adhesives

55

If a bur is used to prepare the tooth it produces a layer of loose debris covering the dentin... This Is called a

Smear layer

56

Method to isolate teeth that are going to be restored

Dental dam (store in refrigerator)

57

When punching the dam

Arch shape
Teeth to be isolated
Identify the anchor tooth
Spacing of holes (3-3.5mm of space between each punch)

58

Maxillary punch

Punch 1 in from the top of the dam

59

Mandibular punch

Punch 2 inches from the lower edge of the dam

60

Rounded portion or extends through the dam material and is always towards the distal

Bow

61

Shaped into 4 prongs and must be secure on the tooth

Jaws

62

The anchor and stabilizes the dam

Dental dam clamps

63

Metal or plastics band that provides and takes the place of the proximal tooth surface (missing wall)

Matrix band/ retainer

64

This device holds the matrix band in position

Tofflemire retainer

65

Outer knob

Holds the matrix band in the retainer

66

Inner knob

Adjust the matrix band size

67

Square box, has little slots where you slide the matrix band

Vise

68

Directional slots guide channels, slots face....

Gingiva

69

Triangular or round and made of wood or plastic

Wedge

70

Inserted into the lingual embrasure to position the matrix band firmly against the gingival margin of the preparation

Wedge
Helps with overhangs

71

An alternative to a universal retainer, bands are formed into a circle and are available in assorted sizes I both metal and Omari.

Automatic system

72

Allows the straight portion to adjust the fit the circumference of the primary molars

T band

73

Plastic matrix

Celluloid matrix it Mylar strip ( used with composite resins or glass ionmer materials for class III and IB restorations in which the proximal wall of an anterior tooth is missing

74

Placed interproximally before the etching and priming of a tooth, protects adjacent teeth from these materials

Clear matrix