Which of these steps comes last?

Trim mandbular base parallel to maxillary cast

A drop of water on a popsicle is an example of _______________.

good wetting (low contact angle)

Which of these steps comes first?

Trim maxillary cast to line scribed at equal height

Which of these best describes how to trim the anterior of a mandibular cast?

Trim the anterior region of the cast canine to canine; rounded

What is the position of the tooth receiving treatment in relationship to the anchor tooth?

The treatment tooth is mesial to the anchor tooth.

Which of these would be the best choice of surgical site care for a patient concerned about post-surgical esthetics?

Placement of a cyanoacrylate dressing

Space maintainers are used to __________________.

temporarily hold teeth in position

A change in the volume/length of composite restorations when eating hot foods & drinking cold liquids is called _______.

coefficient of thermal expansion

Which of the following is the professionally applied whitening material?

power (light/heat-activated) whitening agent

The purpose of wearing an oral appliance for OSA is to modify the position of upper airway structures so that _________.

collapsibility is reduced, the airway is enlarged

Application of a paint-on resin dam prior to power whitening helps _____________________.

isolate teeth and protect gingival tissue

Which of these best describes how to trim the anterior of a maxillary cast?

Trim anterior to be symmetrical canine to canine; forms a point @ midline

Which of these steps comes third?

Trim posterior of mandibular cast to match the posterior of maxillary cast

All of the following are contraindications to light-activated bleaching procedures EXCEPT:

previous use of nightguard bleaching system

The molecules found in a pane of glass can be best described as _________________.

Amorphous Solid, having short-range order

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IWCC DHY Fall 2021 Biomaterials Test #2 Study Guide

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Chapter Review Questions from the Clinical Aspects of Dental Materials: Theory, Practice and Cases textbook. IWCC DHY Fall 2021 Dental Biomaterials Class

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Questions 92

Answers

1
Trim the sides of the casts parallel to the central grooves of the premolars. Which cast do you trim the sides of 1st?
the cast with narrowest anatomy
the maxillary cast
the mandibular cast
the cast with widest anatomy
2
Elasticity, strain, stress, creep, Poisson's ratio, resilience, toughness, fatigue, deformation, proportional limit.
Biologic properties
Physical properties
Mechanical properties
Chemical properties
3
Which of the following is the most common esthetic procedure in dentistry?
porcelain-bonded-to-metal crowns
all-porcelain crowns
tooth whitening
facial veneers
4
Brushing with a potassium nitrate containing dentifrice before and after bleaching is advised.
False
True
5
Which of these steps comes last?
Trim mandbular base parallel to maxillary cast
Trim posterior of mandibular cast to match the posterior of maxillary cast
Trim maxillary cast to line scribed at equal height
Trim posterior of maxillary cast perpendicular to the midline
6
A drop of water on a popsicle is an example of _______________.
good wetting (low contact angle)
good wetting (high contact angle)
poor wetting (low contact angle)
poor wetting (high contact angle)
7
The finished non-eugenol zinc oxide dressing placed after flap surgery should be ___________________.
Extended to the depth of the vestibule
Extended to fill interdental space
Extended to the occlusal surface
Rigid with tapered edges
8
Which of these steps comes first?
Trim mandbular base parallel to maxillary cast
Trim posterior of maxillary cast perpendicular to the midline
Trim posterior of mandibular cast to match the posterior of maxillary cast
Trim maxillary cast to line scribed at equal height
9
When stress is induced in a material that's greater than its yield strength, the stress is __________ to the strain.
always proportional
none of the above
equally proportional
no longer proportional
10
Which of these best describes how to trim the anterior of a mandibular cast?
Trim the anterior region of the cast canine to canine; rounded
Trim anterior to be symmetrical canine to canine; forms a point @ midline
11
Which of these steps occurs last?
Carve away excess stone
Trim the heels of the cast
Trim the anterior of the casts
Trim the sides of the casts
12
An example of a physical property is __________.
stiffness
density
strength
setting reaction
13
Subgroup of physical properties; describe a material's ability to resist forces; dependent on amount, size & shape.
Biologic properties
Physical properties
Mechanical properties
Chemical properties
14
The most common size of rubber dam material is _________________.
6 x 6 inch square
4 x 4.5 inch square
5 x 5 inch square
None of the above
15
Twisting force stress.
Shear
Bending
Tension
Torsion
16
Mouth protectors can be ____________.
custom made
"boil and bite"
stock
all of these
17
What is the position of the tooth receiving treatment in relationship to the anchor tooth?
The treatment tooth is distal to the anchor tooth.
The treatment tooth is mesial to the anchor tooth.
The anchor tooth is the same as the treatment tooth.
The anchor tooth is in the opposite quadrant of the treatment tooth.
18
Based on laws of physics that describe mass, energy, force, light, heat, electricity, and other physical phenomena.
Mechanical properties
Biologic properties
Chemical properties
Physical properties
19
Fingernail polish remover has a tendency to evaporate. It can be said to have ___________.
a low vapor pressure
an intermittent vapor pressure
a high vapor pressure
no vapor pressure
20
A notable advantage of using ceramic materials in dentistry is the property of ___________.
translucency
transparency
brittleness
opacity
21
Pushing or crushing stress.
Torsion
Compression
Shear
Tension
22
A dental polymer with many cross-links as compared to one with no cross-links would be a dental material that is ______.
flexible and weak
stiff and strong
stiff but weak
flexible but strong
23
The tightening of a guitar string is an example of which of the following stresses?
torsion
shear
compression
tension
24
Effects the materials have on living tissue.
Mechanical properties
Chemical properties
Physical properties
Biologic properties
25
Thermoplastic materials will _________ on heating and _________ on cooling.
harden; soften
soften; melt
soften; re-harden
harden; stay hard
26
Which of these would be the best choice of surgical site care for a patient concerned about post-surgical esthetics?
Placement of a cyanoacrylate dressing
Recommending warm saltwater rinses three times a day
Placement of a visible light-activated surgical dressing
Placement of a non-eugenol zinc oxide surgical dressing
27
Stress that occurs when parts of an object slide by one another.
Tension
Shear
Bending
Torsion
28
Elasticity is an example of which of the following properties?
chemical
physical
mechanical
biologic
29
Which formula defines the modulus of elasticity?
strain / stress
2 x stress / strain
stress2 / strain
stress / strain
30
Space maintainers are used to __________________.
alleviate OSA
hold the tongue in proper position
temporarily hold teeth in position
alleviate bruxism
31
A change in the volume/length of composite restorations when eating hot foods & drinking cold liquids is called _______.
thermal conductivity
coefficient of thermal expansion
heat of fusion
heat capacity
32
Which of the following is the professionally applied whitening material?
power (light/heat-activated) whitening agent
whitening dentifrice
nightguard whitening agents
whitening mouth rinse
33
The ability of a material is to dissolve in liquid is termed ___________.
solubility
viscosity
water sorption
wetting
34
Nightguards are worn to ________________.
provide minor tooth movement or stabilization
temporarily hold teeth in position
prevent dental caries
alleviate tooth surface wear
35
The purpose of wearing an oral appliance for OSA is to modify the position of upper airway structures so that _________.
collapsibility is reduced
the airway is enlarged
collabsibility is increased
the airway is reduced
36
Application of a paint-on resin dam prior to power whitening helps _____________________.
hydrate the teeth and tissue
activate the whitening agent
isolate teeth and protect gingival tissue
nourish the teeth and tissue
37
Which of the following would be used as a carrier for nightguard tooth whitening agents?
fluoride tray
custom vinyl tray
boil-and-bite mouth guard
athletic custom mouth guard
38
When two atoms share a pair of electrons, the resulting atomic bond is termed a(an) _____________ bond.
covalent
ionic
secondary
metallic
39
The non-eugenol zinc oxide dressing is held in place by _____________.
sutures
adhesion to the tissue
physical retention
chemical bonding to the tooth structure
40
A twisting force is termed _________.
tension
shear
compression
torsion
41
The sliding of atoms past each other allows this material to bend, not fracture, and maintain its strength.
ceramic
metal
ice
polymer
42
Which of the following would be considered a contraindication to tooth whitening?
body dysmorphic dysfunction
severe intrinsic stain
all of these
root or dentin sensitivity
43
All of the following are examples of a composite except:
set Jell-O with sliced peaches
tin foil
enamel
fiberglass
44
Which of these best describes how to trim the anterior of a maxillary cast?
Trim anterior to be symmetrical canine to canine; forms a point @ midline
Trim the anterior region of the cast canine to canine; rounded
45
When fabricating an oral appliance, which of the following oral anatomical structures should be necessarily replicated?
periodontal ligament
gingival contours of the teeth
sulcus
soft palate
46
Which of these steps comes third?
Trim mandbular base parallel to maxillary cast
Trim maxillary cast to line scribed at equal height
Trim posterior of maxillary cast perpendicular to the midline
Trim posterior of mandibular cast to match the posterior of maxillary cast
47
All of the following are contraindications to light-activated bleaching procedures EXCEPT:
previous use of nightguard bleaching system
use of photosensitive drugs
undergoing radiation therapy or chemotherapy
history of melanoma
48
When shared e- of a covalent bond are shared equally, with one partially "+" and one partially "-", a _______ is formed.
primary bond
permanent dipole
hydrogen bond
fluctuating dipole
49
An aqueous cleaning technology used in pre-whitening and touch up whitening is dispensed in a ____________.
liquid
gel
strip
swab
50
The molecules found in a pane of glass can be best described as _________________.
Amorphous Solid, having short-range order
Amorphous Solid, having long-range order
Crystalline Solid, having both short-range and long-range order
Crystalline Solid, having short-range order only
51
Which of the following variables is NOT a factor in the success of a vital tooth whitening treatment?
strength of the whitening agent
number of teeth to be treated
type and intensity of discoloration of stain
length of exposure of the tooth to the whitening agent
52
A partial charge resulting from an uneven distribution of electrons around an atom forms a bond known as ______________.
metallic
covalent
ionic
secondary
53
_____________ is the term given to the increase of stress around defects within an object.
compression
stress concentration
solubility
viscosity
54
Indications for rubber dam placement include all of the following except one. Which one is the exception?
Visibility
Mositure control
Patient with severe asthma
Patient protection
55
Which of these steps occurs first?
Trim the sides of the casts
Trim the heels of the cast
Carve away excess stone
Trim the anterior of the casts
56
Combination of compression and tensile (tension) forces, with shear forces present within the object.
Bending
Torsion
Tension
Shear
57
A mixture of two liquids that do not blend together to form one liquid is termed a(an) ___________.
colloid
composite
emulsion
solution
58
Which of the following helps prevent gingival irritation while nightguard whitening?
using a small dot of whitening in facial surfaces of tray
using a mouth rinse prior to whitening
using a mouth rinse prior to whitening
using a scalloped tray
59
A statement on safety and effectiveness of whitening products is available through the _______________.
whitening product manufacturer
ADA
MSDS sheets
ADHA
60
Patients may clean oral appliances with a soft-bristled, wet toothbrush.
True
False
61
Which of the following would be a purpose for using the non-eugenol mineral oxide surgical dressing?
To help hold the healing tissues in place
To keep bacteria away from the healing tissues
To stop post-surgical bleeding
To decrease healing time
62
Which of these steps occurs third?
Carve away excess stone
Trim the anterior of the casts
Trim the sides of the casts
Trim the heels of the cast
63
Teeth with a moderate degree of ___________ are the most difficult to successfully whiten.
yellow intrinsic discoloration
extrinsic tobacco stain
extrinsic food and beverage stain
Tetracycline stain
64
Describe setting reactions as well as the decay or degredation of materials.
Biologic properties
Physical properties
Mechanical properties
Chemical properties
65
Pulling stress.
Shear
Tension
Torsion
Compression
66
No commercial products are available in which to soak oral appliances.
True
False
67
Which of the following statements is NOT TRUE regarding tooth sensitivity from tooth whitening?
It is a common side effect
It is NOT reversible
It may be caused by a tray that is too rigid
It can be treated by topical application of potassium nitrate
68
Dental professionals fabricate stock mouthguards. Custom-made mouthguards can be purchased at athletic & drug stores.
The first statement is true; the second is false.
Both statements are false.
The first statement is false; the second is true.
Both statements are true.
69
During power bleaching, a patient must be anesthetized.
False
True
70
When stress is induced in a material that's greater than its yield strength, it ________ return to its original shape.
does
does not
71
The modulus of elasticity is an indication of what property of a material?
strength
tension
resilience
stiffness
72
Athletic mouthguards may prevent a concussion. However, they must be worn correctly and consistently.
Both statements are true
Both statements are false
The first statement is false; the second is true
The first statement is true; the second is false
73
Which of the following would NOT be included in post-surgical instructions following periodontal flap surgery?
Do NOT smoke for 2 hours following the surgery
Do NOT consume warm foodstuffs for 2 hours following surgery
If a small piece of dressing crumbles off, simply discard it
If a piece of dressing breaks off causing discomfort, seek emergency care
74
A hardened cement having "low" _________ can firmly hold a patient's gold crown in place for years in a wet environment.
compression
stress concentration
viscosity
solubility
75
Density, vapor pressure, conductivity, heat capacity, coefficient of thermal expansion, viscosity, hardness, solubility.
Chemical properties
Biologic properties
Physical properties
Mechanical properties
76
The term "nonvital" may be used to describe a tooth that has _________.
all of these
been treated with a root canal procedure
a necrotic pulp
no pulp tissue in the pulp cavity
77
Which of the following statements is the most accurate?
Carbamide peroxide is often applied to teeth as a gel at 35% concentration
Hydrogen peroxide decomposes into water and true radicals of oxygen
Carbamide peroxide is used in the walking bleach whitening technique
Hydrogen peroxide is more stable than carbamide peroxide
78
Athletic mouth guards should be properly fitted, stay in place comfortably, _______________ and ________________.
have a fresh scent
increase the amount of force placed on the occlusion
be made of resilient material approved by the FDA
be physiologically compatible with the wearer
79
Which of the following esthetic tooth treatments requires no removal of tooth structure?
vital tooth whitening
facial veneer
nonvital tooth whitening
porcelain-bonded-to-metal crown
80
The rate of heat flow through a material is referred to as ______________.
heat capacity
coefficient of thermal expansion
heat of fusion
thermal conductivity
81
What type of bond is this: all atoms share e^-, & e^- may be thought of as "+" cores in a cloud of "-" mobile valence e^-?
Ionic
Covalent
Secondary
Metallic
82
_____________ is the force used to condense an amalgam ina preparation.
compression
viscosity
solubility
stress concentration
83
A measurement of change in volume in relation to change in temperature is called the coefficient of thermal expansion.
False
True
84
Which of these steps occurs second?
Carve away excess stone
Trim the sides of the casts
Trim the anterior of the casts
Trim the heels of the cast
85
Patients wearing an oral appliance during sleep have NOT demonstrated a(an) _______________.
increase in periodontal disease
decrease in periodontal disease
change in periodontal health
frequent occurrence of periodontal abscesses
86
Which of these steps comes second?
Trim mandbular base parallel to maxillary cast
Trim posterior of maxillary cast perpendicular to the midline
Trim maxillary cast to line scribed at equal height
Trim posterior of mandibular cast to match the posterior of maxillary cast
87
Which clamp is used for isolation of the facial surfaces of anterior and some posterior teeth?
butterfly-shaped clamps
none of these
winged clamps
wingless clamps
88
Cooled materials will contract, and heated materials will expand.
False
True
89
Why is the intraoral photograph with the shade guide necessary?
To document for patient records
All of these
To document the final color
To document the initial color
90
The armamentarium for removing the rubber dam is/are ________________.
rubber dam forceps
floss
scissors
explorer
91
When should a bleached tooth be restored with a composite restoration?
immediately
1-2 weeks
1-2 days
3-4 days
92
Fluoride custom trays are recommended for which of the following patients?
Three-year-old patient with early childhood caries
Adult patient undergoing head or neck radiation therapy
Elderly patient with severe periodontal disease
Adolescent patient with severe halitosis

IWCC DHY Fall 2021 Biomaterials Test #2 Study Guide Flashcards | StudBud