Good impressions should? Choose all that apply

Hard palate, tuberosities seen on the max impressions, The impression should be centered over the central and laterals, Should have complete peripheral roll present, Tray must not be over seated and free of void and tears, Sharp anatomical detail of the teeth and soft tisses are present, Retromolar, lingual frenum, tongue space present on mandibular impression

Choose all of the characteristics of Amalgam

Becomes permanent after being placed, Metals are in a powder for and mixed with mercury, Used for ocer 150 years, Consists of several metals(alloys)

Composition of amalgam?

Silver 65%, 2% Zinc, Tin 29%, Copper 6%

All are true for application of composite resin, except?

Matrix system is the same for composite and amalgam fillings

When fabricating a custom tray what is a separating medium?

Allows the separation of the tray from the model

studbud

Dental Materials Part 1

199 termsStudBud Administration18 plays

Imported from external platform

Flashcards199 cardsFPractice quizPHost liveL

Questions 199

Answers

1
A glass ionomer used for cementation of ortho band and brackets
Type V
Type IV
Type II
Type III
Type I
Type VI
2
A base is much thinner than a liner, varnish or sealer.
True
False
3
Good impressions should? Choose all that apply
Hard palate, tuberosities seen on the max impressions
The impression should be centered over the central and laterals
Should have complete peripheral roll present
Tray must not be over seated and free of void and tears
Sharp anatomical detail of the teeth and soft tisses are present
Retromolar, lingual frenum, tongue space present on mandibular impression
4
Choose all of the characteristics of Amalgam
Becomes permanent after being placed
Metals are in a powder for and mixed with mercury
Used for ocer 150 years
Consists of several metals(alloys)
5
This is used in place of a varnish to treat hypersensitivity from a newly placed direct/Indirect restoration. A primer
Copal Varnish/Sealer
Desensitizer
Dental Bases
Glass Ionomer
Fluoride Varnish
Dental Liners
6
A polymerization technique that when a material must be exposed to a high intensity blue light
Auto Polymerization
Light Cured
Self Cured
Dual Cured
7
Characteristics of dental impressions include?
Traditional and digital techniques can be used
Taken for fabrication of many dental appliacnes and restorations
A negative of the patients dentition
All of the above
8
The mechanical property that is a reaction within the material that can cause distortion
Tensile
Shear
Compressive
Force
Strain
Stress
9
Fillers are a mixed size, greater than micro fillers, can be polished smoother than macro, has high wear and good shades
Macro Fillers
Coupling Agent
Hybrid Fillers
Micro Fillers
Nanohybrid
10
Over absorption of water
Syneresis
Imbibition
11
A base material may be required to insulate the tooth when using metals in the mouth
False
True
12
A base that soothes a pulp that has been damages by decay or irritated during the process of decay removal
Sedative Base
Protective Base
Insulating Base
13
The mechanical property that is the change produced within the material
Tensile
Shear
Compressive
Strain
Stress
Force
14
Glass ionomers with metal reinforcement are?
All of the above
Used to repair fractured cusps and amalgam filligns
Used as a base
Used for core build ups and abutment for overdentures
Still fluoride releasing
Silver tin alloy added to produce stronger, abrasion resistant material
15
When removing polyether impressions break the seal and rock slightly to prevent tearing
True
False
16
What is true of a pulp cap?
Calcium Hydroxide is used
Placed on the deepest dentin surface of the preparation
Compatible with all types of restorative material
All of the above
17
How do you apply a glass ionomer?
All of the above
Powder and liquid that needs to be mixed on paper pad
Capsules that need to be activated and triturated
With light proof tubes
18
Taken by the DDS/DA produces a reproduction to the occlusal relationship whrn the teeth are in centric occlusion.
Preliminary Impresions
Bite Regeistration
First Impresssions
Final Impresissions
19
Luting agent that is either temporary or permanent
Type I Dental Cement
Type III Dental Cement
Type II Dental Cement
20
Which are true of bonding systems?
Materials are not interchangeable with other systems
Available in self cure, dual cure, adn light cure forms
All of the above
Each system is different
Must be used according to manufacturers instructions
21
Composition of amalgam?
Silver 65%
2% Zinc
Tin 29%
Copper 6%
22
After you use the chemical retention technique it becomes ________ due to the chemicals being used.
Retention
Micromechanical Retention
Mechanical Retention
Chemical Retention
23
A mixing system that provides a homogenous mix using an extruder that does all the work for you
Micing Unit System
Paste System
Putty Sytem
Automix system
24
DA need to know what before taking a impression?
Proper mixing techniques and sequence of use
All of the above
Material Required
Type of tray required
25
Thin liquid that cannot be placed under composite. It seals tubules, reduces microleakage, and acts as a barrier
Glass Ionomer
Desensitizer
Copal Varnish/Sealer
Fluoride Varnish
Dental Liners
Dental Bases
26
Polysulfide impressions should be removed slowly by rocking. Then wait 20 -30 minutes before pouring.
False
True
27
Impression material used to force the other impression material into close contact with the prepared teeth.
Light Bodied Material
Regular Heavy Body material
28
A gel varnish/desensitizer applied after liner and releases fluoride.
Fluoride Varnish
Desensitizer
Copal Varnish/Sealer
Glass Ionomer
Dental Liners
Dental Bases
29
Type of pulpal stimuli that is from traumatic occlusion or the vibration from a handpiece
Chemcial
Physical
Biological
Mechanical
30
All are true for application of composite resin, except?
Supplied in a premixed single paste, light proof syringe or carpule
Placement is done in increments then light cured, before adding another
Prior to preparing the tooth a shade must be obtained
Matrix system is the same for composite and amalgam fillings
Prepartation desgined to hole the restoration by means of bonding
31
Means the material was changed and will not regain previous shape
Deformation
Dimensional stability
Permanent Deformation
32
Protective & insulating base that can be used under all types of restorations due to it not being irritating to the pulp
Zinc Phosphate
Poly Carboxylate
Zink Oxide Eugenol
Glass Ionomer
33
This phase of alginate is when it is in its solid state similar to gelatine
Sol Phase
Gel Phase
34
This stage is the last stage and occurs within 1-24 hours
Final Cure
Initial Set
Final Set
35
Used in deep prep to protect the tooth, may be placed by itself or over a liner, and provides pulpal protection
Dental Bases
Glass Ionomer
Fluoride Varnish
Copal Varnish/Sealer
Dental Liners
Desensitizer
36
What is true of corrosive properties in relation to dental materials?
Metals do not corrode over time
Most is only surface discoloration and can be removed by polishing
Metals may corrode from certian foods
Both Red and Yellow
37
When fabricating a custom tray what is a separating medium?
Creates room in the tray from the impression material
Allows the separation of the tray from the model
Ensures the outer edges are smooth
Is a handhold on the tray to help place and remove the tray from the mouth
38
Whitening treatment option?
All of the above
At home
Over the counter
In office
39
Protective base that is a thermal insulator. Should be placed over a liner to the acid being irritating to the pulp
Glass Ionomer
Zink Oxide Eugenol
Poly Carboxylate
Zinc Phosphate
40
What are some characteristics of Dental Materials?
All of the above
Materials are chosed depending upon what is needed
Materials are used to restore the tooth to original function or protection
Materials should not be poisonous or harmful to the body
41
When amalgam is placed in increments into the prep. Used to compact the amalgam tightly into all areas of the prep
Condensation
Trituration
Polymerizaton
Activating
42
A manual mixing of elastomeric materials that needs to be done quickly right before the DDS needs it
Putty Sytem
Paste System
Micing Unit System
Automix system
43
Composite, not strong enough to be used alone so it's held by inorganic fillers + a coupling agent allows for curing
True
False
44
Used for short term cementation for provisional restorations
Permanent Cements
Primer
Luting Agents
Temporary Cements
45
Heavy Body material is also known as tray-type material
True
False
46
A pulp capping base that is used when a cavity prep is deep and near the pulp to protect against sensitivity
Insulating Base
Sedative Base
Protective Base
47
The oral cavity is constantly moist and will wash away materials that have low solubility
True
False
48
Thin layer placed on the dentin. Forms a strong bond to dentin and enamel, reduces microleakage, and releases fluoride.
Desensitizer
Dental Bases
Copal Varnish/Sealer
Dental Liners
Glass Ionomer
Fluoride Varnish
49
Calcium hydroxide is mixed with a ball shaped applicator or a spatula on a small paper pad
True
False
50
Makes the resin stronger, chemically bonds the filler to the resin matrix.
Macro Fillers
Micro Fillers
Hybrid Fillers
Coupling Agent
Nanohybrid
51
The pulp does not need to be protected from thermal changes
False
True
52
A tray that covers the anterior portion of the arch
Triple Tray
Section Tray
Quadrant Tray
Full Arch Tray
53
Collect all scrap amalgam and store in a clean dry airtight container
False
True
54
Composition of composite consists of ?
Resin Matrix
None of the above
Fillers
Alloys
55
The degree a substance will dissolve in a given amount of another substance is?
Adaptation
Solubility
Retention
Corrosive
56
A tray that covers half of an arch
Quadrant Tray
Full Arch Tray
Triple Tray
Section Tray
57
The mechanical property that pushes the material together
Shear
Compressive
Strain
Force
Stress
Tensile
58
Impression material are also referred to as?
Hydronic Material
Hydrocolloid Material
Hydrochloric Material
Hydropic Material
59
When bonding amalgam, the bonding agent is cured
False
True
60
Used for long term cementation of cast restorations
Primer
Permanent Cements
Temporary Cements
Luting Agents
61
When fabricating a custom tray what is a spacer?
These are triangular or round holes placed to stop tray from over seating
Creates room in the tray from the impression material
Outlines the area to be covered by the tray
Must be filled in with wax
62
Choose all that is true of the basic impression technique
Dentist places tray into mouth over light bodied material
Heavy bodied material is loaded into the tray and passed to dentist
Impression is disinfected and placed in bag and readied for lab tech
Dentist places the light bodied material over and around the prepared teeth
After material reaches final set the impression is removed and inspected
Light bodied material is loaded into syringe and passed to the dentist
63
All is true of reversible Hydrocolloid, except?
Done my means of cooling the material to bring them to a sol
The material changes from sol to gel and then back again
material sets and becomes a gel
If the impression in not adequate the material can be brought back to sol
64
What level of solubility does sand have?
High Solubility
Low Solubility
65
All are true of stock impression trays, except?
The tray must be tried in to find right size
Extends 2 - 3 mm beyond the third molar, retromolar or tuberosity area
Placed deep enough to allow 2-3 mm of material between the tray and teeth
Must extend slightly below the facial surfaces of the teeth
66
Alginate impressions should be stored in 0% humidity
True
False
67
What are some restrictions in the mouth that help dictate what material to use?
Temperature changes
pH balance and pressures
All of the above
Moisture
68
All are true of enamel bonding, except?
Creates a smooth surface
Allows for dental materials to attach directly to the intact enam surface
Material hardens in this location to form a strong mechanical bond
Etched enamel as a matte frosty appearance
Material flows in and around the enamel tags
Acid etch is used to dissolve some the inter-rod substance in enamel
69
All are true of a custom tray, except?
Created from a diagnostic model made after the preparation of teeth
Usually made of acrylic/light cured/thermoplastic resins
made to fit a specific patient
Must use an adhesive with a custom tray
70
When fabricating a custom tray what is are spacer stops?
Creates room in the tray from the impression material
Must be filled in with wax
Outlines the area to be covered by the tray
These are triangular or round holes placed to stop tray from over seating
71
Etch does not remove the smear layer
True
False
72
Smaller than macro filled, highly polished finished restoration, used primarily in an anterior restoration
Hybrid Fillers
Macro Fillers
Coupling Agent
Micro Fillers
Nanohybrid
73
What is the process of mixing amalgam
Trituration
Polymerizaton
Activating
Condensation
74
Application of a provisional restoration is?
PRM is placed in impression then placed back in mouth over prepared tooth
An alginate impression is taken prior to preperation
All of the above
The PRM (Temp Material) is left to cure and occlusion is adjusted/polished
The PRM is then removed and placed back in mouth with temporary cement
75
A glass ionomer used for CL V restoration
Type I
Type III
Type II
Type VI
Type V
Type IV
76
Impression material used because it can flow into and around the details of the prepared tooth.
Light Bodied Material
Regular Heavy Body material
77
Characteristics of composite are? Choose all that apply
Not as strong as amalgam
Placed mainly on anterior teeth
Some bond directly to the tooth surface
Can also be place on posterior teeth
Easily shaped to tooth anatomy and match natural tooth colour
Withstand oral environments
78
Polymerization where some curing occurs as the material is mixed but final cure doesn't not occur until light cured
Auto Polymerization
Dual Cured
Light Cured
Self Cured
79
All are true of Dentin Bonding, except?
For dentin bonding the tooth must be completely dried
Thin layer of debris removes the opening of the tubules for protections
For dentin bonding the tooth must not be completely dried
The success of bonding dentin is removing the smear layer
80
Hydrophilic materials mean?
Dislikes water
Dislikes Electricty
Likes Electricity
Likes Water
81
When a material is held in using a acid etch technique to make a porous surface
Mechanical Retention
Micromechanical
Chemical Retention
Retention
82
Zinc Oxide Eugenol that is a two paste system and is used for temporary cementation of provisional coverage
Type I
Type II
Type III
83
The ability to resist permanent change caused by stresses during removal from the mouth
Deformation
Dimensional stability
Permanent Deformation
84
All that are true of alginate, except?
1:1 ratio of powder to water.
Regular set: Working time of 2 min and setting time of 4.5 min after mix
Fast set: working time of 1.25 min and setting time of 1-2 min after mix
3:3 for adult Max, 2:2 for adult mand
3:3 for adult Mand and 2:2 for adult Max
85
If a tooth has lost a filling what material would be selected?
Intermediate Material
Permanent Restorarion
Provisional Coverage
86
A desensitizer must be used sparingly due to the toxic elements in the material to soft tissues
False
True
87
The mechanical property that pulls and stretches the material
Strain
Shear
Compressive
Stress
Tensile
Force
88
An indirect restoration that covers a thin facial and incisal edge of anterior teeth
Veneers
Ceramic castings
Onlay
Inlay
Gold Allows
Crowns
89
A smooth impression tray does not need to be painted with an adhesive
False
True
90
When fabricating a custom tray what must you do with the undercuts?
These are triangular or round holes placed to stop tray from over seating
Creates room in the tray from the impression material
Must be filled in with wax
Outlines the area to be covered by the tray
91
If a cusp is missing or has been prepared for a casting what material would be selected?
Intermediate Material
Permanent Restorarion
Provisional Coverage
92
Most common elastromeric impressions materials most often used in a dental practice are?
Polyether
Silicone
Polysulfide
All of the above
Polysiloxane
93
When fabricating a custom tray what is a handle?
Ensures the outer edges are smooth
Creates room in the tray from the impression material
Is a handhold on the tray to help place and remove the tray from the mouth
Allows the separation of the tray from the model
94
Which are true about impression trays?
Must be rigid
The tray is either perforated or smooth
Carry the material to the mouth and hold the material close to the teeth
The tray can either be metal or plastic
95
A Zinc Phosphate used as an insulating base for deep preps
Type I
Type II
Type III
96
Varnish's are always placed over a liner or base using a micro brush or cotton pellets. 2 coats are applied
False
True
97
Type of pulpal stimuli that is when acidic material comes in contact with the pulp
Mechanical
Physical
Chemcial
Biological
98
The depth and length of a tray cannot be extended
True
False
99
Digital impression are still not very common in a dental office
True
False
100
Zinc Oxide Eugenol that has reinforcing agents added for cementing cast restorations
Type III
Type I
Type II
101
Noble metals like gold, palladium and platinum used/designed to cover any area of the tooth
Crowns
Onlay
Ceramic castings
Gold Allows
Veneers
Inlay
102
Type of pulpal stimuli that involves thermal changes or electrical energy created by metals coming in contact to teeth
Biological
Mechanical
Chemcial
Physical
103
The ability of a liquid to flow. Ex Water
Adhesion
Viscosity
Surface characteristics
Wetting
104
Once the bonding agent is cured there are many resin projections below the dentin which for micromechanical retention
False
True
105
Tooth whitening is applicable for? Except.
Tobacco Stains
Fluorosis
Food stains
Tetracycline Stains
Restorative Materials
Trauma
106
When fabricating a custom tray what must you do when outlining the tray?
Must be filled in with wax
Creates room in the tray from the impression material
Outlines the area to be covered by the tray
These are triangular or round holes placed to stop tray from over seating
107
High Copper Alloys ____?
Contains high zinc levels
Particles are different shapes so it affects the trituration time
Does not affect the trituration time because particle shapes are the same
None of the above
108
Texture of the preparation causes liquid to flow more easily. Ex. Rough surface
Surface characteristics
Adhesion
Wetting
Viscosity
109
All are indications for Amalgam, except?
When pt's oral hygiene is poor
A foundation for a cast restoration
When aesthetics is important
When moisture control and cost is a concern
Small - moderate sized cavities
Adult and baby teeth
110
Liners and bases used within the cavity preparation
Type III Dental Cement
Type II Dental Cement
Type I Dental Cement
111
An indirect restoration that covers the areas of a tooth between the cusps and when a larger restoration is required
Onlay
Veneers
Gold Allows
Inlay
Ceramic castings
Crowns
112
An indirect restoration that covers the entire crown of the tooth
Gold Allows
Onlay
Veneers
Inlay
Crowns
Ceramic castings
113
Poly Carboxylate can be used as a permanent cement for cast restoration, stainless steel crowns and ortho bands,
True
False
114
Intermediate Restorative Material Characteristics are?
Short term restoration - a few days or several months
A reinforced eugenol composition has a sedative effect on the pulp
All of the above
IRM most often used
Used in restorative emergencies and restoration of primary teeth
Caries management
115
You can wait up 1 hour after mixing dental materials to clean and disinfect the spatula
False
True
116
Shade selection is most accurately accomplished using the overhead light
False
True
117
All is true of at home whitening treatment,. Except?
Custom fitted trays are made in the dental office
Normally achieves two shade lighter
Not under DDS supervision
Regimens vary
118
Characteristics of Provisional Restorative Material are?
Designed to cover major portion of a tooth
Uses auto cured acrylic and light cured composites
Maintans or restores funstion for a lonfer time period
Material must withstand biting forces
All of the above
119
Variables that affect cementation are?
All of the above
Humidity
Mixing time
Powder to liquid ratio
Temperature
120
A tray that covers the entire arch
Section Tray
Triple Tray
Quadrant Tray
Full Arch Tray
121
The property of a liquid that causes it not to flow. Ex. Syrup
Surface characteristics
Adhesion
Wetting
Viscosity
122
Taken by the DDS/DA. Used for diagnostic modes, to create a custom tray, provisional coverages, ortho, and pre/post tx.
Final Impresissions
Preliminary Impresions
First Impresssions
Bite Regeistration
123
What level of solubility does sugar have?
Low Solubility
High Solubility
124
When a material is held in by the shape of the preparation
Chemical Retention
Retention
Mechanical Retention
Micromechanical
125
All is true of in office whitening treatmetn,. Except?
Light or laser source is used to enhance the application
Need complete isolation of teeth
Low concentration of material is applied to facial surfaces
Can whiten up to 5 shades lighter
126
A polymerization technique when two materials (Monomer + Polymer) are mixed together to initiate the setting process
Dual Cured
Auto Polymerization
Self Cured
Light Cured
127
serious loss of water
Imbibition
Syneresis
128
Insulating and sedative base that cannot be used under resin materials.
Zinc Phosphate
Glass Ionomer
Poly Carboxylate
Zink Oxide Eugenol
129
Advantages of amalgam, choose all that apply.
Withstand the oral environment without being irritating to patients
Limited dimensional change
Limited microleakage
Difficult to place in the prep and adapt to cavity walls
Compressive strength as high as cast iron
Remains pliable long enough to place, condense and carve
130
Zinc Oxide Eugenol that is used as a thermal and sedative base
Type III
Type I
Type II
131
A mixing system where you mix the materials in yours hands
Micing Unit System
Automix system
Paste System
Putty Sytem
132
A Zinc Phosphate used for permanent cementation of cast restorations and a very thin film is necessary for cementation
Type II
Type I
Type III
133
A table top mixing system that dispenses mixed material for you
Automix system
Micing Unit System
Paste System
Putty Sytem
134
The process of combining 2 monomers which creates a polymer, when a resin changes from a plastic state to a hard resto
Polymerization
Fusion
Curization
Mutation
135
Glass ionomers are used for?
Core Material Build ups
Intermediate Restorations
All of the above
CL V restorations
Provisionals
baby teeth
136
Which ones below can be used as cements?
EBA Cement
Glass Ionomer
Zinc Phosphate
Poly Carbonate
Composite resin cement
Zinc Oxide Eugenol
137
What is used for finishing and ploshing composite?
Polishing paste and a rubber cup
White stones and finihsing diamonds
All of the above
Carbide finishing burs and diamonds
Finishing Strips
Soft Flex Discs
138
Temperatures change rapidly in the mouth causing contraction and expansion of materials
False
True
139
Type of pulpal stimuli that is when bacteria from saliva comes in contact with the pulp or from caries left in the prep
Chemcial
Mechanical
Physical
Biological
140
All are how whitening materials work? Exceot
The tooth appears lighter or whiter
Whitens the dentin
Tooth structure not altered
When contacts tooth structure it allows oxygen to enter the enamel/dentin
141
Used to stick two unlike substance together, acts as an adhesive for IRM (Indirect restorations)
Temporary Cements
Primer
Luting Agents
Permanent Cements
142
What application property must we take into consideration when choosing a material?
Flow
Both red and yellow
Adhesion
Taste
143
These hand instruments are used to shape the amalgam to the normal anatomy of the tooth
Carver
Spoon Excavator
Burnisher
PFI
144
A thin barrier that lines the deepest layer of the prep. Used to promote tertiary dentin formation and offers protection
Copal Varnish/Sealer
Dental Bases
Dental Liners
Glass Ionomer
Fluoride Varnish
Desensitizer
145
These hand instruments are used to smooth the amalgam
Spoon Excavator
Carver
PFI
Burnisher
146
A tray that covers half an arch on both the upper and lower at the same time. Can also be used to record occlusion
Full Arch Tray
Quadrant Tray
Triple Tray
Section Tray
147
All is true of over the counter whitening treatment,. Except?
Achieve dramatic whitening improvements
Cheaper
Strips or paint ons
Comes with generic tray systems
148
All apply for polysulfide impression materials, except?
Stiffness is low
Rubber base material has a strong odor and can eaily stain clothing
Available in light, regular, and heavy body
Short working and setting times
Used as a final impression material
Supplies as a two paste system that needs to mixed on a pad
149
Nanohybrid composite is used as a bulk-fil which means the increments can be larger in size before curing is necessary
False
True
150
A base that protects the tooth from thermal shock and usually placed under restorations.
Sedative Base
Insulating Base
Protective Base
151
What is true when choosing a dental material in the mouth when we are taking aesthetics into consideration?
match and maintain the colour
Red and blue
Foods and other products stain the teeth
Whether its a buccal or lingual restoration
152
The mechanical property that has parallel forces sliding in opposite directions
Compressive
Tensile
Stress
Force
Strain
Shear
153
Taken by the DDS. Used to produce most accurate reproduction of the mouth for indirect restorations/dentures/implants
Final Impresissions
Preliminary Impresions
First Impresssions
Bite Regeistration
154
Choose all that are true when taking a maxillary impression
Seat the posterior of tray first then anterior, then move the lip
Inserts from 11 o'clock position
Ask the patient to make "o" shape with their mouth after impression is in
Removes from 8 o'clock positions
Uses the entire mass
Dives the alginate in half
155
Characteristics for sealant composites are?
Similar to flowables with a higher viscosity
All of the above
Both Red and Blue
No preparation is required
Tooth is etched prior to placements
156
2nd stage of cure begins with the appearance of elasticity and proceeds through a gradual change to a solid rubbery mass
Final Cure
Initial Set
Final Set
157
Disdvantages of amalgam, choose all that apply
Inadequate edge strength - may fracture if unsupported
Tarnishes with time
Does not match the tooth colour
Recurrent caries happen frequently around the restoration
Low rate of thermal conductivity
Does not bond to the tooth structure
158
What does hydro and colloid mean?
water, liquid substance
electric, gelatinous substance
Electric, Liquid substance
water, gelatinous substance
159
All apply for polyether impression materials, except?
Provides better mechanical properties than polysulfide
A thinned needs to be used because the material is quite stiff
Provides more dimensional change than silicone
Tubes are not the same size. but same lengths dispense the correct amount
Supplied as two paste system
160
An indirect restoration that covers one or more cusps or the natural tooth above the gingiva.
Gold Allows
Veneers
Onlay
Crowns
Ceramic castings
Inlay
161
All are contraindications for Amalgam, except?
When the pt will accept the cost of a cast restoration or something similar
Patients with a history tof allergy to an alloy
When moisture control is a problem
When aesthetics is important
162
Application of an intermediate restoration consists of? Choose all that apply.
Mixed manually on a paper pad using a spatula
Supplied in a powder and liquid
Needs to mixed to a putty like consistency
Premeasure capsules that need to triturated
163
Temporary restorative material is designed to keep the patient comfortable for a limited time period
False
True
164
Largest filler particle providing greater strength, used mostly in posterior teeth, or CL IV where fracturing is likely
Micro Fillers
Macro Fillers
Nanohybrid
Hybrid Fillers
Coupling Agent
165
Elastomeric Impression Materials are?
Impression material that are self curing
All of the above
Is a catalyst
Is a base
166
Characteristics of an etching system are all except?
The etching techniques does not maximize the marginal seal of a rstoration
Tooth condition/acid etch prepares the tooth for bonding
Phosphoric acid is placed on the enamel or dentin to remove the smear layer
Enamel tags are created in enamel after etching
32% - 50% acid concentration in a liquid or gel form
167
A metal tray that has been tried in the mouth but not selected must be sterilized before re-use
False
True
168
When fabricating a custom tray what does finishing mean?
Allows the separation of the tray from the model
Is a handhold on the tray to help place and remove the tray from the mouth
Ensures the outer edges are smooth
Creates room in the tray from the impression material
169
Can also be used as a base, it is fluoride releasing and proved excellent adhesion to enamel and dentin
Zinc Phosphate
Zink Oxide Eugenol
Glass Ionomer
Poly Carboxylate
170
Once the bonding agent is allowed to harden and acts as a hybrid layer
False
True
171
Light bodied material refers to as syringe-type or wash type
False
True
172
Eames technique for amalgam is not widely used anymore
True
False
173
What are characteristics of an indirect restoration?
Referred to as a casting
Materials include Gold alloys or Ceramic
All of the above
Finished casting are either bonded or cemented into place
Fabricated by a dental lab technician
174
Materials will expand and contract at different rates from the tooth structure causing what?
Expansion
Microleakage
None of the above
Contraction
175
Restorative materials such as Glass Ionomers
Type III Dental Cement
Type II Dental Cement
Type I Dental Cement
176
Characteristics for flowable composites are?
All of the above
Fillers for wear resistance
Supplied as a hybrid or nanofilled
Used with CL V carious lesions and in a prepared tooth
177
Choose all that are true when taking a mandibular impression
Inserts from 11 o'clock position
Break the seal from 8 o'clock
Inserts from 8 o'clock positions
Uses the entire mass
Dives the alginate in half
Seat the posterior of tray first then anterior, then move the lip
178
The ability of the material to keep its shape after it has been removed from the mouth
Deformation
Permanent Deformation
Dimensional stability
179
The mechanical property that is any push or pull on an object
Strain
Shear
Compressive
Stress
Force
Tensile
180
Resin based cements are used for the followng, except?
CL V restorations
Orthodontic Molar bands
Metal castings including post and core build ups
Direct bonding of ortho brackets
Ceramic Veneers
Cementaion of ceramis or resin inlays and onlays
181
Provides micromechanical retention between the tooth and the restoration, and bonds the material to the enamel & dentin
Dental Adhesion
Lining the pulp
Mechanical Retention
Polyemirizaton
182
Composite material that's is dispensed through a handpiece, makes the material more flowable and more adaptive
Macro Fillers
Coupling Agent
Nanohybrid
Micro Fillers
Hybrid Fillers
183
The ability of a restoration to remain firmly in place
Retention
Chemical Retention
Micromechanical
Mechanical Retention
184
All is true of Irreversible Hydrocolloid, except?
Most commonly used for preliminary impressions
Most accurate impression material
An impression is an exact negative of the dental arch
Alginate
185
Which of the following are true of the cement removal process?
All of the above
Excess cement is removed from around the margins, interprox areas
If excess cement is not removed the cement could irritate the area
Once cementation is complete the pt is asked to bite down for a few minutes
186
Characteristics of a glass ionomer are?
Excellent Biocompatibility
Bonds chemically to teeth
All of the above
Used as a restorative material/liner/base, bonding agents & cements
Can be placed in a moist environment
Slow release of fluoride for up to 2 years
187
Material used for both strength and aesthetics, used to match natural tooth coloring and approve the look of anterior s
Veneers
Crowns
Gold Allows
Ceramic castings
Inlay
Onlay
188
Hydrophobic materials mean?
Likes Electricity
Dislikes Electricty
Likes Water
Dislikes water
189
This phase of alginate is when it is in its liquid or semi liquid form
Sol Phase
Gel Phase
190
Thin liquid that cannot be placed under composite. It seals tubules, reduces microleakage, and acts as a barrier
Dental Bases
Fluoride Varnish
Dental Liners
Copal Varnish/Sealer
Glass Ionomer
Desensitizer
191
A glass ionomer used for a core build up
Type II
Type III
Type VI
Type V
Type I
Type IV
192
A glass ionomer used as liners and bases
Type V
Type IV
Type I
Type VI
Type III
Type II
193
The ability of the material to fit or adapt to the preparation as accurately as possible is?
Corrosive
Adaptation
Solubility
Retention
194
1st stage of cure that results in stiffening of paste without the appearance of elastic properties. Can be manipulated.
Initial Set
Final Set
Final Cure
195
Desiccation means over drying
False
True
196
A 1:1 ratio of mercury to alloy is used with amalgam
False
True
197
What is true of electrical properties of dental materials?
All of the above
Different metals act as a battery and conduct electricity
Galvanic Action occurs when two different metals are present in the mouth
Saliva contains salt which acts as a conductor between two metals
198
A glass ionomer used for cementation of indirect restorations
Type III
Type II
Type V
Type VI
Type I
Type IV
199
Temporary Restorative Material is used for?
Reduce sensitivity of a tooth to determine diagnosis
Maintain function until permanent unit is placed
All of the above
Prevent shifting of adjacent or opposing teeth
Protect margins of a prepared tooth that will receive a permanent casting

Dental Materials Part 1 Flashcards | StudBud