Week 4

Question 1

Dissipate

Answer 1

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

Question 2

Exothermic

Answer 2

Characterized by the release of heat from a chemical reaction.

Question 3

Luting agent

Answer 3

Cement-type substance used to seal a surface.

Question 4

Retard

Answer 4

To slow down a process.

Question 5

Spatulate

Answer 5

To mix using a spatula-type instrument.

Question 6

Anatomic portion

Answer 6

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

Question 7

Articulator

Answer 7

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

Question 8

Crystallization

Answer 8

Chemical process in which
crystals form a structure.

Question 9

Die

Answer 9

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

Question 10

Dihydrate

Answer 10

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

Question 11

Dimensionally stable

Answer 11

Resistant to changes in width, height, and length.

Question 12

Facebow

Answer 12

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

Question 13

Gypsum

Answer 13

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

Question 14

Hemihydrate

Answer 14

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

Question 15

Homogenous

Answer 15

Having a uniform quality and consistency throughout.

Question 16

Lathe

Answer 16

Machine used for cutting or polishing dental appliances.

Question 17

Model

Answer 17

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

Question 18

Monomer

Answer 18

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

Question 19

Polymer

Answer 19

Compound of many molecules.

Question 20

Slurry

Answer 20

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

Question 21

Volatile

Answer 21

Substance that can evaporate easily and is very explosive.

Question 22

Arch wire

Answer 22

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

Question 23

Auxiliary

Answer 23

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

Question 24

Band

Answer 24

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

Question 25

Braces

Answer 25

Another term for fixed orthodontic appliances.

Question 26

Bracket

Answer 26

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

Question 27

cephalometric radiograph

Answer 27

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

Question 28

Crossbite

Answer 28

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

Question 29

Crowding

Answer 29

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

Question 30

Dentofacial

Answer 30

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

Question 31

Distoclusion

Answer 31

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

Question 32

Fetal molding

Answer 32

Pressure applied to the jaw, causing a distortion.

Question 33

Headgear

Answer 33

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

Question 34

Ligature

Answer 34

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

Question 35

Open bite

Answer 35

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

Question 36

Overbite

Answer 36

Increased vertical overlap of the maxilary incisors.

Question 37

Overjet

Answer 37

Excessive protrusion of the maxillary incisors.

Question 38

Positioner

Answer 38

An appliance used to retain teeth in their desired postion.

Question 39

Retainer

Answer 39

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

Question 40

Separator

Answer 40

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

Question 41

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

Answer 41

Humidity

Question 42

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

Answer 42

Fluoride

Question 43

Can resin cements be used under metal castings?

Answer 43

Yes

Question 44

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

Answer 44

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

Question 45

How should polycarboxylate cement appear after the miXing process?

Answer 45

Somewhat thick Glossy and shiny surface

Question 46

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

Answer 46

50% phosphoric acid in water

Question 47

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

Answer 47

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

Question 48

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

Answer 48

Smallest increment of powder

Question 49

Do you "fill" or "line" a crown with permanent cement?

Answer 49

Line

Question 50

What age groups seek orthodontic care?

Answer 50

All age groups - pediatric

Question 51

Give a type of genetic cause for malocclusion.

Answer 51

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

Question 52

What term is used for abnormal occlusion?

Answer 52

Malocclusion

Question 53

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

Answer 53

First molar

Question 54

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

Answer 54

Crossbite

Question 55

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

Answer 55

Overbite

Question 56

What two positions does the orthodontist evaluate for facial symmetry?

Answer 56

Frontal and profile

Question 57

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

Answer 57

Extra oral radiograph - cephalometric

Question 58

What instrument is used to seat a molar band?

Answer 58

Band plugger

Question 59

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

Answer 59

Separator

Question 60

Are brackets cemented or bonded to a tooth?

Answer 60

Bonded

Question 61

How can hard foods possibly harm braces?

Answer 61

Loosen bands, bend and occasionally break arch wires

Question 62

How can a patient make flossing easier with braces?

Answer 62

Using a floss threader

Question 63

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

Answer 63

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

Question 64

Give an example of a retention appliance.

Answer 64

Retainer Positioner

Question 65

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

Answer 65

Separate area away from the patient treatment area

Question 66

What specialty practices might have a more extensive laboratory setup?

Answer 66

Pediatric dentistry Orthodontics Fixed and removable prosthodontics

Question 67

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

Answer 67

Items brought from inside the area

Question 68

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

Answer 68

Model trimmer

Question 69

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

Answer 69

#7 wax spatula

Question 70

What is another term for a dental model?

Answer 70

Study casts

Question 71

What dental materials are used to make dental models?

Answer 71

Gypsum products

Question 72

What are the three forms of gypsum?

Answer 72

Model plaster Dental stone High strength stone

Question 73

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

Answer 73

100g/45 to 50 ml

Question 74

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

Answer 74

Powder to water

Question 75

What are gypsum materials mixed in?

Answer 75

Rubber mixing bowl

Question 76

What are the two parts of a dental model?

Answer 76

Anatomical portion Art portion

Question 77

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

Answer 77

Posterior area of the impression

Question 78

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

Answer 78

45 to 60 minutes

Question 79

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

Answer 79

Maxillary

Question 80

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

Answer 80

Wax bite

Question 81

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

Answer 81

Acrylic resin tray

Question 82

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

Answer 82

Vital bleaching tray

Question 83

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

Answer 83

Thermoplastic resin material

Question 84

What is the purpose of a spacer?

Answer 84

To create room in the tray for the impression material

Question 85

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

Answer 85

Boxing wax

Question 86

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

Answer 86

Utility wax

Question 87

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

Answer 87

Impression wax

Question 88

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

Answer 88

Inlay casting wax

Question 89

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

Answer 89

Face bow

Question 90

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

Question 91

In which two forms is acrylic resin supplied?

Question 92

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

Question 93

Amalgam tray set up

Answer 93

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

Question 94

Amalgam tray accessories

Answer 94

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

Question 95

Bonding agents

Answer 95

Light cured Auto cured

Question 96

Flowable composite

Answer 96

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

Question 97

Composite

Answer 97

Tooth colored filling material

Question 98

Tofflemire matrix band holder

Answer 98

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

Question 99

Sectional matrix band

Answer 99

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