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Dental Assistant > Week 4 > Flashcards

Week 4 Flashcards

1
Q

Dissipate

A

To cause something to scatter, or become dispersed, and gradually disappear.

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2
Q

Exothermic

A

Characterized by the release of heat from a chemical reaction.

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3
Q

Luting agent

A

Cement-type substance used to seal a surface.

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4
Q

Retard

A

To slow down a process.

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5
Q

Spatulate

A

To mix using a spatula-type instrument.

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6
Q

Anatomic portion

A

The structural portion of a dental model created from the alginate impression.

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7
Q

Articulator

A

Dental laboratory device that simulates mandibular and temporomandibular joint movement when models of the dental arches are attached to it.

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8
Q

Crystallization

A

Chemical process in which
crystals form a structure.

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9
Q

Die

A

An accurate replica of the prepared portion of a tooth used in the laboratory during the fabrication of a cast restoration.

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10
Q

Dihydrate

A

Relating to gypsum products and indicating two parts of water to one part of calcium sulfate.

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11
Q

Dimensionally stable

A

Resistant to changes in width, height, and length.

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12
Q

Facebow

A

Portion of articulator used to measure the upper teeth as compared with the temporomandibular joint.

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13
Q

Gypsum

A

Mineral used in the formation of plaster of Paris and stone.

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14
Q

Hemihydrate

A

Removal of one-half part water to one part of calcium sulfate, forming the powder product of gypsum.

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15
Q

Homogenous

A

Having a uniform quality and consistency throughout.

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16
Q

Lathe

A

Machine used for cutting or polishing dental appliances.

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17
Q

Model

A

Replica of the maxillary and mandibular arches made from an impression.

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18
Q

Monomer

A

A molecule that, when combined with other molecules, forms a polymer.

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19
Q

Polymer

A

Compound of many molecules.

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20
Q

Slurry

A

Mixture of gypsum and water used in the finishing of models.

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21
Q

Volatile

A

Substance that can evaporate easily and is very explosive.

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22
Q

Arch wire

A

A contoured metal wire that provides force when teeth are guided in movement for orthodontics.

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23
Q

Auxiliary

A

Attachments located on brackets and
bands that hold arch wires and elastics.

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24
Q

Band

A

Stainless steel ring attached to molars to hold the arch wire and auxiliaries for orthodontics.

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25
Q

Braces

A

Another term for fixed orthodontic appliances.

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26
Q

Bracket

A

small device bonded to teeth to hold the arch wire to the teeth.

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27
Q

cephalometric radiograph

A

An extra oral radiograph of the bones and tissues of the head

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28
Q

Crossbite

A

Condition that occurs when a tooth is not properly aligned with
its opposing tooth.

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29
Q

Crowding

A

Condition that occurs when teeth are not properly aligned within
the arch.

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30
Q

Dentofacial

A

Structures that include the teeth, jaws, and surrounding facial
bones.

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31
Q

Distoclusion

A

class ll malocclusion in which the mesiobuccal cusp of the maxillary first molar occludes (by more than
mandibular first molar.
the width of a premolar) mesial to the mesiobuccal groove of the

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32
Q

Fetal molding

A

Pressure applied to the jaw, causing a distortion.

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33
Q

Headgear

A

An external orthodontic appliance that is used to control growth and tooth movement.

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34
Q

Ligature

A

Light wire used to hold the arch wire in its bracket.

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35
Q

Open bite

A

lack of vertical overlap of the maxillary incisors, creating an opening of the anterior teeth.

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36
Q

Overbite

A

Increased vertical overlap of the maxilary incisors.

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37
Q

Overjet

A

Excessive protrusion of the maxillary incisors.

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38
Q

Positioner

A

An appliance used to retain teeth in their desired postion.

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39
Q

Retainer

A

appliance used for maintaining the positions of the teeth and jaws after orthodontic treatment.

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40
Q

Separator

A

device made from wire or elastic and used to separate molars before fitting and placement of orthodontic bands.

41
Q

What variable affects the addition or loss of water in a dental cement?

A

Humidity

42
Q

What ingredient in the powder of glass ionomer cement helps to Inhibit recurrent decay?

A

Fluoride

43
Q

Can resin cements be used under metal castings?

A

Yes

44
Q

In the composite resin cementation procedure, what step is important to complete on the tooth surface before cementation of the material?

A

The tooth must be free of
plaque and debris and must be
prepared by etching.
Or by treatment with a bonding system

45
Q

How should polycarboxylate cement appear after the miXing process?

A

Somewhat thick
Glossy and shiny surface

46
Q

What is the main component in the liquid form of zinc phosphate cement?

A

50%
phosphoric acid in water

47
Q

How do you dissipate the heat from zinc phosphate during the mixing process?

A

The cement must be spatulated over a wide are of a cool, dry, thick glass slab

48
Q

What size of powder increment is first brought into the liquid of zinc phosphate during mixing?

A

Smallest increment of powder

49
Q

Do you “fill” or “line” a crown with permanent cement?

A

Line

50
Q

What age groups seek orthodontic care?

A

All age groups - pediatric

51
Q

Give a type of genetic cause for malocclusion.

A

Small jaw one parent- large teeth other parent
Missing tooth inherited

52
Q

What term is used for abnormal occlusion?

A

Malocclusion

53
Q

What tooth is used to determine a person’s occlusion?

A

First molar

54
Q

If a tooth is not properly lined up with its opposing tooth, it is said to be in

A

Crossbite

55
Q

If a person occludes and you cannot see the mandibular anterior teeth, what is the patient’s malalignment?

A

Overbite

56
Q

What two positions does the orthodontist evaluate for facial symmetry?

A

Frontal and profile

57
Q

What type of radiograph is used to review the anatomic base for malocclusion?

A

Extra oral radiograph - cephalometric

58
Q

What instrument is used to seat a molar band?

A

Band plugger

59
Q

To prepare for the placement of orthodontic bands, what procedure is completed to wedge teeth apart

A

Separator

60
Q

Are brackets cemented or bonded to a tooth?

A

Bonded

61
Q

How can hard foods possibly harm braces?

A

Loosen bands, bend and occasionally break arch wires

62
Q

How can a patient make flossing easier with braces?

A

Using a floss threader

63
Q

When a patient’s braces come off, does this mean that treatment is over? Why not?

A

No. To achieve long term results, orthodontic control of tooth position and occlusal relationships must be withdrawn gradually not abruptly

64
Q

Give an example of a retention appliance.

A

Retainer
Positioner

65
Q

Where would the dental laboratory be located in a dental office?

A

Separate area away from the patient treatment area

66
Q

What specialty practices might have a more extensive laboratory setup?

A

Pediatric dentistry
Orthodontics
Fixed and removable prosthodontics

67
Q

What is an example of a contaminated item in the dental laboratory?

A

Items brought from inside the area

68
Q

What piece of equipment is used to grind away plaster or stone?

A

Model trimmer

69
Q

What is the most common wax spatula size used in the laboratory?

A

7 wax spatula

70
Q

What is another term for a dental model?

A

Study casts

71
Q

What dental materials are used to make dental models?

A

Gypsum products

72
Q

What are the three forms of gypsum?

A

Model plaster
Dental stone
High strength stone

73
Q

What is the water-to-powder (g/ml) ratio of plaster?

A

100g/45 to 50 ml

74
Q

When mixing gypsum materials, do you add the
“powder to the water or the “water to the powder?

A

Powder to water

75
Q

What are gypsum materials mixed in?

A

Rubber mixing bowl

76
Q

What are the two parts of a dental model?

A

Anatomical portion
Art portion

77
Q

When pouring an impression, where in the maxillary impression do you begin to place the gypsum material?

A

Posterior area of the impression

78
Q

How long should you wait before you separate the model from the impression?

A

45 to 60 minutes

79
Q

Which of the two models (maxillary or mandibular)
do you begin measuring and trimming first?

A

Maxillary

80
Q

What should be placed between the two models when one is trimming them together?

A

Wax bite

81
Q

Of the three types of custom trays discussed, which technique uses a more hazardous material?

A

Acrylic resin tray

82
Q

Which type of custom tray is made for a vital bleaching procedure?

A

Vital bleaching tray

83
Q

Which type of material is used for a vacuum-formed custom tray?

A

Thermoplastic resin material

84
Q

What is the purpose of a spacer?

A

To create room in the tray for the impression material

85
Q

What type of wax is used to form a wall around a preliminary impression when pouring it up?

A

Boxing wax

86
Q

To extend an impression tray, what type of wax would you use?

A

Utility wax

87
Q

What type of wax would you use to obtain a patient’s bite impression?

A

Impression wax

88
Q

What is the most common wax used to create a pattern for an indirect restoration?

A

Inlay casting wax

89
Q

What piece of equipment does the dentist use to determine centric relation on a diagnostic model?

A

Face bow

90
Q

What area on the maxillary and mandibular model is trimmed differently?

A
91
Q

In which two forms is acrylic resin supplied?

A
92
Q

How are undercuts corrected on a model when preparing a custom tray?

A
93
Q

Amalgam tray set up

A

Mouth mirror
Explorer
Cotton pliers
Spoon excavator
Amalgam carrier
Condenser
Discoid/cleoid carver
Hollenback carver
Football/ball burnisher

94
Q

Amalgam tray accessories

A

Dycal placing
Cement spatula
Universal matrix
Retainer, band
Wedges
Floss
Amalgam well
Amalgam capsule

95
Q

Bonding agents

A

Light cured
Auto cured

96
Q

Flowable composite

A

Runny version of composite and is sometimes used to line the inside of the preparation

97
Q

Composite

A

Tooth colored filling material

98
Q

Tofflemire matrix band holder

A

Used to hold the matrix band tightly around the tooth
MO
DO

99
Q

Sectional matrix band

A

Ensure tighter contact between the teeth after the composite restoration is completed

Dental Assistant (7 decks)

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