Dental Materials Chapter 2

Front 1

Restorative materials

Back 1

Need to have stronger atomic bonds then the foods we eat

Front 2

Elasticity is

Back 2

Stress/strain the

Front 3

The example of a physical property

Back 3

Density

Front 4

Torsion

Back 4

Is a twisting force

Front 5

Elasticity is an example of

Back 5

Mechanical property

Front 6

Nail polish has solvent properties and evaporates fast it is said to have

Back 6

High vapor pressure

Front 7

What is the force used to compress amalgam

Back 7

Compression

Front 8

Term given to the increase of stress around defects in a given object

Back 8

Stress concentration

Front 9

A failure within the bonding material

Back 9

Cohesive

Front 10

Orthophosphoric acid (enamel etch) is commonly used in a what concentration

Back 10

37%

Front 11

Primary teeth need etched longer because

Back 11

The enamel rods are less regularly arranged than on permanent teeth

Front 12

Dentinal bonding system functions by way of

Back 12

Micro mechanical bonding and secondary atomic bonds

Front 13

Dentinal debri is also called the

Back 13

Smear layer

Front 14

Use of bonding does everything except

Back 14

Retention of color

Front 15

The adhesive mechanism of dentinal bonding system is a hybrid layer of

Back 15

Resin and decalcified dentin

Front 16

Polymers high coefficient of thermal expansion is what times greater then the tooth structure

Back 16

2-10

Front 17

Which coating serves to transfer stress from a weak component to a strong one

Back 17

Silane coupling agent

Front 18

What benefit do microfilled composites have over macrofilled

Back 18

Smooth and lustrous polished surface

Front 19

Chemical cure composites may

Back 19

Incorporate air bubbles during mixing

Front 20

Depth of the cure

Back 20

The amount of composite threat is cured by the light source

Front 21

Flowable composites have

Back 21

Lower viscosity to aid in placement.

Front 22

Hybrid composites are used in

Back 22

Areas needing strength

Front 23

Flowable composites have

Back 23

Lower viscosity to aid in placement.

Front 24

Hybrid composites are used in

Back 24

Areas needing strength

Front 25

Preventative resin restoration

Back 25

A combination pit and fissure sealant and a composite

Front 26

Flowable composites have

Back 26

Lower viscosity to aid in placement.

Front 27

Hybrid composites are used in

Back 27

Areas needing strength

Front 28

Preventative resin restoration

Back 28

A combination pit and fissure sealant and a composite

Front 29

Abrasion resistance for composite restorative materials is

Back 29

Very good

Front 30

Thermal expansion for microfilm composite restorative materials is considered

Back 30

Poor

Front 31

Which composite has the most filler by weight

Back 31

Hybrid

Front 32

Composite materials that polymerize using light activation

Back 32

Are supplied as a single paste

Front 33

Compomer

Back 33

Restorative material that releases fluoride and then sets like a composite

Front 34

In microfilm composites

Back 34

Polish ability is very good but strength is low

Front 35

Alginate is

Back 35

Easy to use

Front 36

Irreversible hydrocolloid

Back 36

Is a aqueous elastomeric

Front 37

The brown paste used in a rubber base is the

Back 37

Accelerator

Front 38

A dental impression compound is known as a

Back 38

Thermoplastic material

Front 39

ZOE impression paste

Back 39

Is a inelastic impression material

Front 40

Gelation

Back 40

The setting of hydrocolloid impressions

Front 41

Agar impression material is limited by

Back 41

Need for special equipment

Front 42

Syneresis

Back 42

When alginate slightly contract and exudes water

Front 43

Imbibtion

Back 43

When an impression absorbs water

Front 44

Hysteresis

Back 44

Materials charictericstic of having a melting temperature different then gelling temperature

Front 45

The impression tray used to record the prepared tooth, bite registration, and impression of opposing teeth is

Back 45

Triple tray

Front 46

Bite registration tray

Back 46

Records the occlusal of both arches.

Front 47

Agar

Back 47

Sets by physical means

Front 48

Agar, aliginate, and additional silcone

Back 48

All set by chemical means

Front 49

Gypsum a sutible accelorator followed by the sutible retarder is

Back 49

Potassium sulfate and borax

Front 50

Gypsum material known as high strength stone is also called

Back 50

Improved stone

Front 51

Final set time for gypsum is

Back 51

30-45 minutes

Front 52

When mixing dental stone 50 mg stone to

Back 52

14-15 mL water

Front 53

When access water is not present it in gypsum is known as the

Back 53

Dry strength

Front 54

Orthodontic band

Back 54

Encircles the tooth and its radiopaque

Front 55

Emery

Back 55

A abrasive that looks grayish-black sand and is sometimes called “corundum”

Front 56

Pumice is

Back 56

Produced by a volcano and used in a laboratory and on restorative materials such as gold and amalgam

Front 57

Whiting

Back 57

Abrasive used as a slurry to polish amalgam restorations and it is called calcium carbonate

Front 58

Finishing

Back 58

The process of producing the final shape and contour of a restoration

Front 59

Patients wearing a oral appliance at night have not shown a

Back 59

Change in periodontal health

Front 60

Flouride trays are recommended for

Back 60

Adult patient undergoing head or neck radiation therapy

Front 61

When taking maxillary impressions the right handed operator should be standing at

Back 61

11

Front 62

Example of a vehicle used with powder would be

Back 62

Glycerin

Front 63

During routine polish with pumice

Back 63

3-4 um of flouride rich layer is removed

Front 64

Recommended prophet paste comes in

Back 64

High polish and low abrasion

Front 65

Pumice is

Back 65

Harder then enamel

Front 66

Airpolish removes

Back 66

Biofilm and stain

Front 67

The most frequently used abrasive in dentifrice is

Back 67

Silica

Front 68

Diamond powder

Back 68

Most commonly found in polishing agents for esthetic restorations

Front 69

Someone with Tabacco stains, 2 gold crowns and composites should be polished with what combo

Back 69

Traditional prophy paste, tin oxide, and a polish for esthetic restorations

Front 70

OSA is ment to

Back 70

Enlarge the airway and reduce collapsibility

Front 71

Mixing time and set time for alginate

Back 71

1 minute and 3-4 minutes

Front 72

Additional silicone tray material is placed over syringe material and held in place for

Back 72

5-7 minutes

Front 73

Additional silicone material is best prepared

Back 73

With two people

Front 74

The tray adhesive used in the double putty wash technique should dry in the impression tray for

Back 74

10 minutes

Front 75

What mm depth of alginate should extend beyond the occlusal surface in a properly fitting tray?

Back 75

2-3 mm

Front 76

Why is beading wax added to the impression tray

Back 76

To protect the tissue from injury.

Front 77

Where would you place rope wax for a patient with a high vault.

Back 77

The palatal portion

Front 78

Aliginate impressions take

Back 78

3-4 minutes to set

Front 79

Gag reflex is triggered when

Back 79

The posterior third of the tongue is touched.

Front 80

What material is used to cover a fixed appliance so it doesn’t become locked in the impression

Back 80

Rope wax

Front 81

What material is used to cover a fixed appliance so it doesn’t become locked in the impression

Back 81

Rope wax

Front 82

Which impression should be taken first

Back 82

Mandibles it builds patient familiarity and confidence

Front 83

Alginate powder should sit how long after fluffing

Back 83

30 seconds

Front 84

The maxillary tray should be loaded from the

Back 84

Posterior

Front 85

On which types of model is a restoration or appliance fabricated on

Back 85

Cast

Front 86

Plaster is known as type

Back 86

2

Front 87

Stone is known as type

Back 87

3

Front 88

What decreases the set time of a gypsum product

Back 88

Addition of a chemical accelerator

Front 89

When mixing adding powder to the water results in

Back 89

Assured proper consistency

Front 90

When hand mixing use a

Back 90

Wiping motion not a whipping one.

Front 91

The length from the start of a mix until it is semi hard is the

Back 91

Initial setting time

Front 92

The length from the start of a mix until it is semi hard is the

Back 92

Initial setting time

Front 93

The length until the mass becomes rigid is the

Back 93

Final setting time