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Dentistry > Materials Final > Flashcards

Materials Final Flashcards

1
Q

What dental wax is supplied in sheets and can be used to record the occlusal rim for dentures

A

Baseplate wax

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2
Q

What can be used under direct and indirect restorations

A

Desensitizer/primer

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3
Q

Guidelines for mixing dental cement

A

Read instructions, determine use and measure powder and liquid with powder and liquid on opp sides, divide powder in small increments

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4
Q

What type of crown doesnt cover the entire anatomic portion of the mouth

A

Three-quarter crown

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5
Q

You can lengthen or extend the borders of the impression tray by using what

A

Utility wax

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6
Q

What is the powder to water ration for high strength stone

A

100 stone to 19-24ml water

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7
Q

When a patient has a three unit bridge what is used to clean under the Pontic

A

Bridge threader

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8
Q

Physical pulpal stimuli

A

Thermal changes/electrical energy

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9
Q

Mechanical pulpal stimuli

A

Vibrations from handpiece during prep, traumatic occlusion

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10
Q

Chemical pulpal stimuli

A

Acidic materials

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11
Q

Biologic pulpal stimuli

A

Bacteria from saliva contacting pulpal tissues

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12
Q

How are elastomeric impression materials mixed

A

Pad/spatula, gun

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13
Q

Abutment

A

Natural tooth serves as support for replacement tooth

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14
Q

Pontic

A

Artificial tooth replaces missing natural tooth

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15
Q

Can intrinsic stains or severe tetracycline stains be bleached

A

Yes

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16
Q

What type of indirect restoration is designed to fit snugly within a tooth preparation such as a class 2, covering only a portion of the occlusal and proximal surface

A

Inlay

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17
Q

What type of impression tray covers half of a dental arch

A

Quadrant tray

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18
Q

What type of impression material is used when an accurate impression is essential

A

Final impression, elastomeric

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19
Q

What type of cement is most versatile

A

Glass ionomer

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20
Q

Acid etching utilizes etchant that contains what type of acid

A

Maleic acid/phosphoric acid

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21
Q

What is the purpose of provisional coverage

A

Temporary crown restores and maintains function to certain areas keep patient comfortable during tooth preparation/final cementation

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22
Q

What can be used if decay has extended into or is close to the pulp

A

Liner, base, desensitizer

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23
Q

The retromolar area, lingual frenum, and the mylohyoid ridge must be seen in which impression

A

Mandibular Alginate impression

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24
Q

What cements can be light cured

A

Composite resin, glass ionomer

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25
Q

Cure

A

Setting process of dental material initiated by chemical reaction or buy light in blue waves spectrum

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26
Q

What can be used for core buildup

A

Amalgam, reinforced glass ionomer, self curing composite

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27
Q

For quick bleaching results which method would be best

A

In office treatment

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28
Q

Maryland bridge/resin bonded bridge

A

A pontic with wing like extensions from mesial/distal sides

29
Q

What type of tray is used for the reversible hydrocolloid

A

Water cooled tray

30
Q

If placing a post for retention aid, what procedure would have had to have been done prior

A

Core buildup, enlarging the treated pulp canal/keying slots on adjacent Dentin

31
Q

Example of enamel bonding

A

Placement of sealants, bonding of ortho brackets, use of resin bonded bridges

32
Q

When using zinc phosphate as a base what is used first

A

A liner

33
Q

Why do you keep the Alginet impression moist before pouring it up

A

Will provide an atmosphere Close to 100% relative humidity causing the least amount of distortion

34
Q

The cervical margins of the provisional should have no more then how many millimeters of space between the provisional and the margin of the prepped to

A

0.5 mm

35
Q

Which type of ZOE is used for the cementation of provisional coverage

A

Type one, temp luting cement

36
Q

When and how is varnish applied

A

Applied with small disposable applicator after liner is applied

37
Q

Microleakage

A

Microscopic leakage at the interface of the tooth structure and the sealant or restoration

38
Q

When cementing bonded brackets, what type of glass ionomer cement is used

A

Type five

39
Q

If the patient needs to wear a provisional coverage for a longer period of time what procedure might they have had

A

Implants or Perio therapy

40
Q

Pre-fabricated Preformed polymer crown

A

Use a polymer shell filled with hybrid composite resin material

41
Q

Pre-fabricated poly carbonate crown

A

Only anterior’s varying sizes when appearance is important

42
Q

Pre-fabricated stainless steel crown

A

Aluminum primary posterior restoration when strength is essential in color match is not a concern

43
Q

What is the most common and natural looking provisional coverage used for crown and bridge preparations

A

Custom/polycarboxylate

44
Q

Calcium hydroxide (Dycal) uses and what is it compatible with

A

Cavity liner, protect pulp from chemical irritation, stimulates production of reparative or secondary Denton, compatible with all types of restorative material

45
Q

About how many years does tooth whitening last

A

3 to 5 years

46
Q

In office teeth whitening

A

One hour best treatment

47
Q

At home teeth whitening

A

Two weeks second best (under care of Dentist)

48
Q

Over the counter teeth whitening

A

Brush On: minimum amount whitening strips: 7 to 10 days trays with gel: affordable, similar to dental office

49
Q

Where shouldn’t the provisional crown extend below

A

Margin of the preparation

50
Q

What can dental varnish do

A

Seal Denton tubules and reduce microleakage

51
Q

Model trimmer

A

Used to trim stone or plaster models, abrasive grinding wheel

52
Q

How will gypsum material be affected if water is added after the mixing process has begun

A

The crystallization (setting) process will be disturbed and won’t have desired strength

53
Q

What is this smear layer and wet material removes it

A

Very thin layer of debris on newly prepped Denton and acid etch and is used to remove it

54
Q

Permanent cement are used for looting what types of restoration

A

Long term cementation of permanent cast restorations (inlay, crown, bridges, laminate veneers, ortho fixed appliances)

55
Q

Indications for provisional coverage

A

Prevent/reduce sensitivity/discomfort of prepped tooth/surrounding tissue, maintain function/aesthetics, protect margins of prep, prevent shifting of adjacent/opposing teeth

56
Q

What do insulating bases protect the tooth from

A

Thermal shock

57
Q

What can be cemented into the pulpal canal and can be made from an acrylic pattern by a lab technician

A

A cast post

58
Q

What is the purpose of a core build up

A

Used when tooth is vital, supports the cast crown and provides a larger area of surface retention for cementation of crown

59
Q

What type is a looting cement classified as and what does it act as

A

Type one, acts as an adhesive to hold together the indirect restoration and the tooth structure

60
Q

Which type of cement is used with provisional coverage

A

ZOE type one

61
Q

Why are protective bases placed

A

Additional layer in restoration process used to protect pulp went to the prep is moderately deep too deep

62
Q

When one or more teeth are missing from the same arch or quadrant a permanent what would be recommended

A

Crown and bridge or fix prosthodontic or fixed bridge

63
Q

What type of glass ionomer used for restoring an area of erosion near the gingiva

A

Type two

64
Q

What is placed under a porcelain restoration to mask tooth discoloration

A

Opaquer

65
Q

What would be an indication for fixed prosthodontics

A

Supportive tissues healthy, suitable abutments present, patient in good health, patient has skills/motivation for good oral hygiene, one or two adjacent teeth missing same arch

66
Q

Procedure/application of acid etchant material

A

Liquid or gel with syringe type applicator, 15 to 20 seconds recommended time for placement, placed on enamel and/or Denton in prep for bonding composite resin or sealant

67
Q

Application and uses for desensitizer

A

Used to prevent or treat hypersensitivity (primer), used instead of varnish, seals dentinal tubules preventing oral fluids from sleeping between tooth and restoration. Use sparingly no materials contact soft tissue

68
Q

Where is the varnish applied in the cavity prep

A

After liner applied within entire prep, thin coating on walls, floors, and margin

69
Q

Dental materials that are applied while still pliable and can be adapted are classified as what

A

Direct restorative materials

Dentistry (63 decks)

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