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Dental Assisting > Mod 4 Final > Flashcards

Mod 4 Final Flashcards

1
Q

With light cured cements, it is not necessary to advise patients to avoid sticky foods, since the cement is set.

A

False

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2
Q

In preparation of cementing with a composite resin, the tooth is prepared by:

A

Placing acid etchant

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3
Q

The most commonly used vasoconstrictor utilized in impregnated retraction cords is:

A

Epinephrine

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4
Q

When there is a possibility of a pulp exposure, or if there is a potential of coming too close to the pulp:

A

An indirect pulp cap liner is placed

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5
Q

Loss of alveolar bone associated with extended periods of wearing a removable prosthetic will occur most often with the ____ arch.

A

Mandibular

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6
Q

When all of the natural teeth are missing, this is called being edentulous.

A

True

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7
Q

When fitting a stock impression tray, the operator must look to determine if mandibular ____ is present on the lingual aspect.

A

Tori

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8
Q

Final impressions are used for the fabrication of crowns, bridges, and bleach trays.

A

False

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9
Q

The material supplied as a cartridge system is:

A

BIS-GMA composites

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10
Q

Materials used to fabricate removable prosthetic devices include:

A

Synthetic plastic resins and alloy metals

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11
Q

A primary advantage of the use of polyether impression materials is that polyether may be repoured several times due to its low tear strength and dimensional stability.

A

False

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12
Q

A polyether ____ to mix as compared with polysulfide impression material

A

is easier

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13
Q

Natural teeth or implants used to support or anchor the fixed prosthesis are:

A

Abutments

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14
Q

What does the etching do in preparing a tooth for a final restoration?

A

Removes the smear layer

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15
Q

The dental professionals who might be involved in the actual fabrication process of a provisional restoration are:

A

Dentist, dental assistant, and dental lab technician.

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16
Q

The three types of bases are

A

Insulating, sedative, and protective

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17
Q

____ materials are used to record and simulate how the patient’s areches occlude.

A

Bite registration

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18
Q

Polyether impressions can be adversely affected by immersion in a disinfectant. Which disinfectant can be utilized for immersion?

A

Chlorine compound

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19
Q

The correct mixing procedure for alginate impression material requires the following

A

All of above

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20
Q

The components of the removable partial denture include all of the following except:

A

Attachment

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21
Q

Border molding is:

A

Part of the final impression, where softened compound or wax is placed along the borders of the denture.

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22
Q

A full crown for a single tooth is needed to restore a tooth that has lost approximately ____ percent or more of its natural tooth structure.

A

50

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23
Q

When making a mouth guard on the vacuum former, the plastic sheet is placed and secured onto the:

A

Metal frame

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24
Q

One dentin sealer product that is designed to cut off the flow of the tubule fluids by sealing tubules is:

A

Gluma

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25
Q

The major connector on the mandibular prosthesis is often a ____ design.

A

Bar or plate

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26
Q

A properly fitting provisional restoration prevents saliva from leaking onto the dentinal tubules. This will prevent:

A

Sensitivity to hot and cold.

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27
Q

A vacuum former may be used to fabricate bleach trays, mouth guards, or fluoride trays.

A

True

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28
Q

A preformed polycarbonate crown works well for tooth #14, since it is more aesthetically pleasing and only needs to be relined.

A

False

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29
Q

____ teeth will resist stain, but are brittle and noisy.

A

Porcelain

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30
Q

Intermediate restorations provide extended periods of clinical observation for a tooth with a questionable prognosis. Materials of choice are

A

Reinforced ZOE cements

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31
Q

Alginate impression material will take approximately 2-3 minutes to develop into a ____ state.

A

Gelation

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32
Q

A preformed provisional single unit can be fabricated from:

A

All of the above

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33
Q

____ is released by some varnishes to help with hypersensitivity of the cervical areas.

A

Fluoride

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34
Q

Due to an acidic element of zinc phosphate when it is used, a liner must also be placed.

A

True

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35
Q

A provisional that is improperly fitted might cause some tooth movement, which could require adjustments or even a possible remake of the final restoration.

A

True

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36
Q

The teeth most often used to anchor or hold the overdenture are the first premolars.

A

False

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37
Q

Which base is best used as an insulating base?

A

Polycarboxylate

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38
Q

Advantages of the indirect provisional coverage technique include all of the following except:

A

Less expensive than the direct method.

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39
Q

Which of the following is true of varnishes?

A

They can be used to seal the dentin tubules.

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40
Q

A precise replica of a prepared tooth created from an impression is a/n:

A

Die

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41
Q

Newer technology continues to improve the strength, shade choices, setting characteristics, and ____ for provisional materials.

A

Clinical techniques

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42
Q

Study models, bleaching trays, and mouth guards are all examples of ____ impression.

A

A preliminary

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43
Q

Provisional restorations should accomplish all of the following except:

A

Discourage healing of soft tissues.

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44
Q

____ is used to protect the tooth from damaging effects of moisture.

A

Varnish

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45
Q

The provisional restoration is referred to as a temporary prosthesis or a/n:

A

Interim restoration

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46
Q

After spraying hydrocolloid impressions for disinfection, they should be placed in a plastic bag to prevent evaporation of the disinfectant.

A

True

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47
Q

The cement that is mixed on a glass slab to minimize the temperature rise from the heat given off is:

A

Zinc phosphate

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48
Q

____ seals the dentinal tubules that prevent oral fluids and bacteria from seeping between the tooth and the restorative material.

A

Desensitizers

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49
Q

High strength base glass ionomer cements:

A

all of the above

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50
Q

When sizing the retraction cord, the best judgement for length is the circumferance of the index finger.

A

False

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51
Q

____ material is more brittle are than methacrylates, and is not suitable for provisional bridges.

A

Bis-acryl composite

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52
Q

An opaquer will be utilized to:

A

Block out the dark color of cast metal restorations prior to stacking the natural tooth-colored preparation

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53
Q

The use of ____ through the interproximal areas will help to dislodge any casual-set dental cement.

A

Dental floss

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54
Q

The acrylic base may be impregnated with pigmentation and fibers to

A

Create a natural appearance

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55
Q

Which of the following would not be completed during the first crown procedure appointment?

A

Removal of the provisional

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56
Q

Calcium hydroxide promotes secondary dentin, is insoluble, and bonds to dentin.

A

False

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57
Q

The cast model is a positive representation of someone’s dentition

A

True

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58
Q

The dentist will make small preparations on the occlusal, incisal or lingual surfaces of a tooth to accomodate the ____ portion of a removable partial denture.

A

Rest

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59
Q

After acid etching the tooth, if it becomes contaminated with saliva, simply redry the tooth.

A

False

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60
Q

One advantage of a removable prosthetic is that it

A

Replaces missing teeth and structure for function and aesthetics.

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61
Q

____ is the most widely used preliminary impression material in dentistry.

A

Alginate

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62
Q

Material or low viscosity resins that are used to improve retention between two objects, such as enamel and dentin, and the restoration are called

A

Bonding agents

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63
Q

Success will be achieved when taking an elastomeric impression if good retraction techniques are practiced with moisture control and proper ____.

A

Tissue retraction

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64
Q

Calcium hydroxide is a common type of dental liner that is also known by the manufacturer name:

A

Dycal

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65
Q

Bonding agents and restorative materials are considered intermediary materials

A

False

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66
Q

Impregnated retraction cords contain astringent- vasoconstrictor agents to control bleeding and shrink the tissue, sich as epinephrine.

A

True

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67
Q

When calcium sulfate dehydrate is heated, the end product is called

A

Hemihydrate

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68
Q

Preformed polycarbonate provisional crowns are available for both ____

A

Anterior and bicuspid posterior teeth

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69
Q

The separate restoration fabricated to rebuild damaged or fractured tooth structure in preparation for a crown is a

A

core buildup

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70
Q

Glass ionomer material has the following properties, except that it

A

Comes with a solvent

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71
Q

Composite resin cements have thick film, and are easily dissolved by oral fluids in the mouth.

A

False

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72
Q

____ is the best used as a protective base

A

Zinc phosphate

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73
Q

A ____ guard prevents material from spraying the room while using the rag wheel and pumice.

A

Splatter

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74
Q

When using a base, the sequence of placement would be base, liner, restorative.

A

False

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75
Q

For a temporary restoration, a low strength base with sedative qualities would be used, such as

A

Zinc oxide eugenol

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76
Q

What materials are used to provide a buffer between the pulp and the final restoration?

A

Dental bases

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77
Q

To prevent drifting of the dentition, it is important to maintain ____ between the teeth

A

Proximal contact

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78
Q

Glass ionomer cement mechanically and chemically bonds to enamel, dentin, and metallic materials.

A

True

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79
Q

The two parts of a cast model are the ____ which includes the teeth and oral structures.

A

Anatomic portion

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80
Q

Dentures should be cleaned

A

All of the above

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81
Q

Type II glass ionomers are used for restoring areas of erosion near the gingiva

A

True

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82
Q

Partial dentures most often are made of composite resin or porcelain.

A

False

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83
Q

The dental cement used as a temporary restoration, permanent cement for cast restorations, and as a high strength base is called

A

Polycarboxylate

84
Q

The two basic components of a compete denture are the:

A

Denture base and teeth

85
Q

The cement that has a sedative effect on the pulp is:

A

Zinc oxide eugenol (ZOE)

86
Q

____ are a type of provisionall crown that are only utilized on posterior teeth, where aesthetics are not a concern.

A

Aluminum shell crowns

87
Q

Should the preparation become moderately too deep or close to the pulp, the dentist will place ____ under the final restoration.

A

Base

88
Q

When the tooth responds to the stimuli of saliva coming in contact with the pulp, this is referred to as

A

Biological

89
Q

After placing the sealer on the tooth, one should wait ____ before air drying.

A

30 seconds

90
Q

Zinc phosphate powder is properly prepared by ____ the bottle.

A

Shaking

91
Q

History has found that teeth in dentures were sometimes made from ivory, bone, or teeth from either dead or living donors.

A

True

92
Q

The retraction cord is placed within the sulcus with the use of a/n ____ instrument.

A

Cord packing

93
Q

Which of the following is not a contraindication for a fixed prosthesis?

A

Good adjacent teeth are available for abutments.

94
Q

Polysiloxane impression materials, commonly known as addition silicone materials, are available in an automatic dispensing unit that includes

A

An extruder gun and mixing tip

95
Q

Factors that might indicate the need for a patient to have a full complete denture treatment planned include

A

All of the above

96
Q

The portion of the denture that contacts the abutment teeth and prevents movement of the partial when chewing and swallowing the retainer

A

Clasp

97
Q

Galvanism is a pulpal stimuli

A

True

98
Q

Eugenol is an obtudent, meaning it is soothing to the pulp.

A

True

99
Q

Stone model should be soaked in water for at least ____ minutes before trimming to help with the trimming process.

A

30

100
Q

Patients who wear a removable partial denture are encouraged to maintain regular dental exam and teeth cleanings to ensure that the

A

Remaining teeth do not develop dental caries, and the remaining bone remains healthy

101
Q

____ is placed on the floor of the cavity preparation to protect pulp from bacteria and irritants

A

Liner

102
Q

The most common form if gingival retraction is

A

Chemical

103
Q

The forms ZOE comes in for restoration application include capsule, syringe, ____ and two paste systems.

A

Powder/ liquid

104
Q

The process or ability of an impression to shrink over time due to the loss of water is called

A

Syneresis

105
Q

All dental cements may be used as bases

A

True

106
Q

Methacrylates contain both a base and a catlayst, and work by self polymerizing.

A

True

107
Q

A restoration that covers or replaces the major part or the whole part of the clinical crown of a tooth is a:

A

Crown

108
Q

Veneers may be fabricated to accomplish all of the following except:

A

Open spaces or diastemas

109
Q

A stent is used most often to fabricate a/n ____ provisional.

A

Bridge

110
Q

An inlay is an example of a class ____ restoration.

A

II

111
Q

All impressions should be gently rinsed to remove blood and debris, then soaked or sprayed with:

A

Hospital grade disinfectant

112
Q

Hydrocolloid materials change from one state to another due to their:

A

Thermal changes

113
Q

Which materials would currently be utilized to fabricate a removable prosthetic device?

A

Alloy metals and synthetic plastic resins

114
Q

Imbibition is the process of contracting and shrinking with time because of exuding water

A

False

115
Q

After disinfecting an impression, the impression should be loosely wrapped in a plastic bag to prevent ____

A

Evaporation of the disinfectant

116
Q

When finished trimming with a model trimmer, it should immediately be turned off.

A

false

117
Q

The type of prosthesis that utilizes wings that are bonded to the lingual surfaces of anterior teeth is a/n:

A

Maryland Bridge

118
Q

Dental cements are more versatile in their properties, ____, and mixing techniques.

A

Uses

119
Q

A gypsum substance consiting of two parts water and one part calcium sulfate is called

A

Dehydrate

120
Q

When the alginate impression is removed from the patient’s mouth, the operator should ____ and then disinfect.

A

Rinse the impression under cold water

121
Q

Advantages to using the direct technique for fabricating as provisional restoration include

A

Time eficiency

122
Q

____ is most commonly used as a sedative base

A

Eugenol

123
Q

Excess cement can become lodged within the gingival crevice by ____ the gingiva to provide the operator the ability to visually inspect the marginal area.

A

Retracting

124
Q

Mechanical retraction is accomplished with the use of:

A

A temporary crown

125
Q

Celluloid crown form provsionals are available only for

A

Premolars and anterior teeth

126
Q

After cementation of the provisional restoration, patients should eb educated that the cement requires ____ for final set.

A

45 minutes

127
Q

When taking impressions, the steps after placing the tempered material into a hydrocolloid tray are in the order

A

123

128
Q

ZOE with eugenol is contraindicates for use with composite

A

True

129
Q

A partial and a denture are two examples of a prostheses

A

True

130
Q

A patient might need to wear a provisional restoration for a period of ____ to allow bone and gingival tissues to heal around an implant.

A

Six months

131
Q

Dental lab mixing bowls are disinfected with

A

Hospital grade disinfectant

132
Q

There are several methods used for fabricating a tempory; vacuum formed matrix, alginate impresssion, and PVS impressions

A

True

133
Q

Retraction cords are placed to stop tissue bleeding and to ensure accurate impressions of the margin

A

True

134
Q

A patient who is ednetulous

A

is without teeth

135
Q

The disinfecting of reversible hydrocolloid impression includes

A

Use of an iodophor or glutaraldehyde solution

136
Q

Type I ZOE cement has low strength and great anti microbial properties, adn therefore is ideal as a permanent restoration.

A

False

137
Q

Which of the following would not be an important consideration to education of patients who are wearing a provisional restoration?

A

The provisional might break or come off but will not need to be re cemented

138
Q

____ is another product placed between the liner and the permanent restoration to help protect the pulp.

A

Base

139
Q

Hydrophillic impression materials have an aversion to water and less wetting ability

A

False

140
Q

An exothermic reaction occurs when you are light-curing cements

A

False

141
Q

A dental lathe and model trimmer are used in the same way and can produce the same results

A

False

142
Q

Composite resin cements are utilized for

A

Bonding orthodontic brackets

143
Q

All materials used in the restoration of a tooth prior to the placement of the final restorative material are known as

A

Intermediary

144
Q

Surgical retraction performed to remove hypertrophied or excess tissue is accomplished with the utilization of an electrosurge, surgical knife or

A

Laser

145
Q

The temporary crown should extend beyond the margin, so that the margins are protected from decay

A

False

146
Q

Many difficulties can occur when manipulating irreversible hydrocolloid material, including:

A

All of the above

147
Q

The consistency of zinc oxide and eugenol cement when used as a temporary restoration

A

Putty like

148
Q

When removing dental cement from the interproximal areas, the dental assistant should use a ____

A

Fulcrum

149
Q

Factors that might result in a patients choosing a removable prosthesis as opposed to a fixed prosthesis include;

A

adequate bone support

150
Q

A polycarboxylate cement us utilized for

A

All of the above

151
Q

WHile working with vacuum formers, lathes, or model trimmers, hair should be pulled back into a pony tail and all PPE should be worn

A

True

152
Q

The patients dental ____ are mounted onto the articulator with lab plaster

A

Casts

153
Q

The restoration that is fabricated to be placed into a prepared cavity, and that covers the occlusal surface and one more cusp is

A

onlay

154
Q

Stone models should be soaked in ____

A

Water

155
Q

A high strength base dental cement needed for restoration

A

Zinc polycarboxylate

156
Q

The initial setting time for most dental plaster is ____ minutes.

A

5-15

157
Q

When applying dentin bonding resin material, it is important to air dry the tooth until the tooth is desicated.

A

False

158
Q

A screw like device specially designed to be placed surgically within the mandibular or maxillary bone is a

A

Implant

159
Q

A tray made specifically for an individual patient

A

Custom tray

160
Q

The prepared tooth may also be called the stump

A

True

161
Q

To add a new layer of hard acrylic to the internal portion of a denture, which serves to restore the overall fit

A

Reline

162
Q

A denture that does not fit the alveolar ridge properly will

A

cause degeneration of the ridge more rapidly

163
Q

When mixing zinc phosphate cement, the powder and liquid are mixed over a large area with a ____ motion.

A

Figure eight rotary

164
Q

If warm water is added when mixing alginate impression material, the material will set:

A

faster

165
Q

A preformed provisional single unit crown may be fabricated from polymer, polycarbonate, aluminum, copper, and

A

Celluloid

166
Q

The V Shaped spaces formed by the contour and position fo the adjacent teeth is the

A

Embrasure

167
Q

Unused hydrocolloid tubes that have already been boiled are ____ for a total of three times for reuse.

A

Re boiled

168
Q

Which of the following is not an important consideration for a posterior provisional restoration

A

Provide acceptable aesthetics

169
Q

Provisional restorations must satisfy mechanical, aesthetic, and ____ factors.

A

Biological

170
Q

Many times the dental assistant will be responsible for obtaining preliminary impressions

A

True

171
Q

Articulation is the term for the position of the mandible when the teeth are fully biting together

A

False

172
Q

Indications for a fixed prosthesis include all of the following except

A

Supportive tissues bone and gingiva are diseased

173
Q

A ____ is utilized to restore the anatomical crown on an endodontically treated tooth during the preparation phase of crown placement.

A

Cast post

174
Q

To prevent changes in a reversible hydrocolloid impression such as dimensional changes to syneresis or imbibiton the operator should

A

Immediately pour the impression

175
Q

The major advantage of an all ceramic crown is that it

A

Is more natural looking

176
Q

In addition to the health history, records that would also be utilized during a prosthetic appointment include study models, radiographs, and

A

Photographs

177
Q

The purpose of the retainer is to connect the partial to the abutment teeth and to

A

Prevent movement of the partial

178
Q

Reinforcement of a provisional bridge might be necessary of a patient has oral habits such as

A

Clenching or grinding

179
Q

The smear layer is created through the use of dental burs

A

True

180
Q

Agar- hydrocolloid material is heated until it flows and is cooled. It changes from a

A

Gel to a sol to a gel

181
Q

Most dental cements are also used as a ____ which is applied in a thick layer over a liner

A

Base

182
Q

Custom trays are utilized for impression to fabricate complete and partial dentures and:

A

Long bridge spans

183
Q

The provisional crown is fabricated before the crown preparation appointment

A

False

184
Q

The chemical setting process of resin materials is known as

A

Polymerization

185
Q

The articulator ____ movement of the mandible and the shape of the patients condyle to duplicate the patients occlusion

A

Simulates

186
Q

The type of wax commonly used for registering a patients occlusion is known as

A

Bite reg wax

187
Q

During setting, zinc phosphate cement creates an exothermic reaction and therfore needs to be mixed on glass slab.

A

True

188
Q

Zinc phosphate cement is known as the gold standard cement because it was the first cement discovered to have the ability to chemically bond to the tooth structurew

A

False

189
Q

The two paste systems are mixed manually with :

A

A spatula, an oil- impermeable paper pad, or clean glass slab

190
Q

With the powder/liquid ZOE, the liquid contains the resin and accelerator

A

False

191
Q

A fixed partial denture is also known as a

A

Fixed bridge

192
Q

Reline is a process where softened compound or wax is placed along the borders of the denture

A

False

193
Q

The embrasure is the junction where the temporary provisional meets the tooth structure

A

False

194
Q

Glass ionomer cements release ____ to help prevent caries

A

Fluoride

195
Q

Silicone rubber impression material is sensitive to

A

Moisture

196
Q

If any dental cement is left at the contact area, tooth ____ oculd occur

A

Sensitivity

197
Q

Polycarboxylate cement shuld be mixed for approximately ____ seconds in order to allow time for the seating of a fized prosthesis

A

30

198
Q

The pontic portion of a fixed bridge is

A

the artifical tooth that replaces the missing tooth

199
Q

An abutment tooth with evidence if caries should be ___ before taking the impression for denture

A

Restored

200
Q

A patient with type II periodontal disease and rampant decay on multiple teeth would be a candidate for crowns and or bridges

A

False

201
Q

____ types of liner are used in cavity preparations

A

three

202
Q

Bonding agents bond to all of the following except

A

Varnish

203
Q

Gingival retraction cords are supplied in untwisted and twisted ___ forms

A

braided

204
Q

Dentin sealers are commonly known as ____ and are used instead of dental varnishes

A

Desensitizers

205
Q

A properly contoured provisional should extend to the ___ portion of the preparation but not beyond

A

margun

Dental Assisting (13 decks)

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